- 1 -

APPENDIX I

AGS COUNTER :E:XPERI!V1CNTS _... . ._ .... __ . ....- -~ " - ............. .......-.. .. -.- ... ..-.--

1 • STRONG I NTERACTIONS

65/498/5 p/sb

~ ... .-..=u. - ---- - ...,,..._~~-a.~

1 01 1 Baker e . a . Phys.Rev . Lott.], 101 (1961).

Results

v

Differential Cerenkov counter method

p a nd rr production in Al and Bo at 10, 20, 25, and 29.5 GoV/c

lab . anglo 4.75, 9, 13, and 20° p spectr wn 15 momenta

rr spectr um 10 + +

also I~ /rr- and p/rr ratios given .

Production ratio Al/Bo = 1 .1 - 1 .4

pp c . m. distributions give transverse momenta ~ 0.5- 1 GoV/c

Low mome ntum K' s from K pairs, high momentum K' s from associated production .

1 02 2 Fitch e . a . Phys.Rev . 12..§ , 1849 (1962) .

Results

Time-of-flight method

production of rr, I~ , p, p, d, t , and Hc3 in Al and Bo at 30 and 33 GeV

33 GoV,lab . anglo 13°: spectra (7 momenta) 2 to 5 GoV/c

30 GcV, 45° spectra (10 mom0ntn) 0.2 to 2 .5 GeV/c

30 GoV, 90° spectra (3 points) 0 .2 to 1.2 GeV/c .

Al/Be factor ·J . 3 for rr at 13° , for d 1 . 3 at 13°, 2 .0 a t 45°. At 45 and 90° p:d:t = 100: 10:1 at 13° p:d = 100:1

Most 90° (lab . ) particlos cFtnnot stem directly from pp collisions since p- p c .m. distributions ar e found not to bo symm0tric 1·1i th r ospoct to 90° ( c . m. ) . They must bo products of ca scades . d soom to stom from pick-up processes .

- 2 -

1 03 2 3chwarzschild a . a . Phys . Rvv . }29 , 854 (1963) .

Rosul ts

Time-of-flight mvthod

production under 30° of rr, p , d, t in Al , Bo , nnd Fe at 30 GoV, nnd of I\ and j3 in Bo

Jpoctr a 1 to 3 GoV/c

p/rr , t/d, cl/p, Al/Bo and Fe/Al retios given.

d and t production in p- p collision improbable. Collective phcnomona . For rr and p o. model (Cool) giving tho protons 400 MoV/c and tho pions 300 "A1cV/c a.vcrngc trnn::ivcrsc momontun gives r casonGblc agreement .

1.2 Total cross- sections

04 1 Lindenbaum c.a . Phys .Rev . Lott . ] , 185 ( 1961 ) . 18

pp , 15 points from 4 to 20 . 3 GcV/c

precision 1 - 2 mb

pp same r c..ngc , 2 - 3 mb precision.

Results pp constant at nbout 40 mb, pp falling . ·- - --- ----------- - - - -- ·- - --

65/498/5 p/sb

1 05 1 idem. Phys .Rev.Lott . J, 352 (1961) +

rr-p 13 points from 8 to 20 GcV/c

procision 0 .5 - 1 mb .

Fall ing for both signs , diffor0ncc about constant . Fits given.

1 06 2 Bakor e . a. Phys .Rav . .1?2, 2285 (1963) . 11 5

Results

K+p 13 points from 3 . 25 to 19 GcV/c

precision 1 mb

K-p 12 points L. .• O to 19 .1 GcV/c

prec ision 1 to 2 mb.

+ K flat at nbout 18 .4 mb , no drop found as in Experiment 2 07 O.

re is higher' decreases slowly .

1 07 2 Diddcns

TI.csult ..-.. .... - .

.--. . ., ...... . .. .

- 3 -

f'hys .R'-v . 1)~, 2721 ('1'.,JG3) .

K-p 13 points from 2 . 67 to .') . 18 GoV/c

precision 0 . 7 - 0 . 8 mb .

'Somu structuru' .:11. 3 .5 GoV/c .

1 08 3 Didd<..;ns c . o. . Phys .Rev .Lott . _1.Q , 262 (1963).

+ rr-p 25 points from 1.51 to 5 . 79 GcV/c

precision 0 . 2 - 0 .4 mb .

Two penks I= 1/2 at 2 . 19 GoV (cm . total ener gy) I - % nt 2 . 36 GeV.

----- - --- --- -·- -

1 09 4 Citron o . n . Phys .Rev .Lott . ~1], 205 (1 964) . 205

Rosult

1+5 points 2. 1 to 6 . 9 GcV / c

precision < 25 µb point to point 0 . 3 mb absolute .

Two more I = 1/2 at 2 . 64 GcV ponks I = % nt 2 .84 GoV .

·------ ---- ~ - -- -----

65/498/5 p/sb

110 2 :::3l'.lrnr0 .a . Phys .Rcv.L0tt . 2 , 221 (1962). 109

Results

pp with internal CH nnd C target

mngn . ana.lyBis of both umittod protons

2 points p = 11 . 2 GcJT/c -t = 6 . 15 (Gc::V/c) 2, 15 nnd

30° lab . angl <..; .

p = 16 . 0 G,N / c -t = 11 . 1 ( GeV / c) 2 , 15 and

2 c". . 5° lab . nnt;l o

error < 25%.

In conjunction .ri th Exp . 2 15 2 , a ch:->ngo of slope in a ( t) , d0fine:d by

( ) ( ·/ )2a:(t)-2 X ;o; di~(~) optical X = F t s s 0 -d dt t = 0

at t = 1 indicated .

65/498/5 p/sb

- 4 -

1 11 3 DnJwr o . a . J'hys .Rov .Lvtt • .U, l~95' (1963). 109

Rvsults

pp S'lfno us 1 10 2, but difft;l'\ .. n t l:'..b • .'.1.n[,h.s .

18 points p from 13.0 to 21.9 G0V/c - t :i 2.2G to 19 .65 (GoV/c) 2

precision ,-tbout 1 o% calibration by a '1.Ctivntion.

Abov0 60° c . m. 10:-:;s c ckp·.nd.·~ncu . At l".rgG t moro s­cle:p._,ndcmco . Fit by

(tnX)//p = f(cos 4 {) c . m.)

p = incid0nt momentum (lab) •

----- -------- --- ··--··- ·-

1 12 4 B.".Jmr e , ,., , Phys .Rov .I,0tt . J2, 132 (1964) . 109

Rosul ts

pp continue. ti on of 1 11 3 11 now points - p :: 18 . 9 to 30.9 GoV/c

-t = 2 . 25 to 24 . 39 (G0V/c) 2

errors 25%, uorsc nt high t.

~"..mo onclusions ns 1 11 3. 3o~ ~lso J. Oronr, Phys .Rev .Lot t. j 2, 11 2 (1 964) . All d"..tn f it ono c::cponontinl in p1/Po . p0 = 151 McV/c, ~L. = tr."..nsvcrso momentum.

------- --· - ·- - --

1 13 3 Foley c . et . Phys .Rev.Lett • .1.Q, 376 (1 963). 172

Results

pp , recoil me thod (hodoscope s mo".surc sco..ttoring nnd r E:coil "..ngl o )

7 1noment.'.'. 6 .8 to 19 .6 GcV/c for e"..ch p up to 8 cnglcs - t = 0.2 - 0. 9 (GcV/c ) 2

error 1 Cl/6 1r-p , s."..mo ruothod 6 momonto.. 7 ,1 t o ·16,9 GeV/c up to 8 ~nslos -t = 0.2 to 0 . 9 (GoV/c) 2

c rror ".bout 15%.

For pp 1 shrink.".ge·1• 'rho slope of a ( t ) i s 0 . 75 ( GoV / c )-2

,

somewhat loss .-~t hit;h s . Fo r rr-p no shrink~gc , s l ope 0 .008! 0. 080 .

65/498/5 p/sb

1 14 3 Foley 172

Re;sults

- 5 -

o . ::. . Phys .Rev.Lott . jQ , 543 (1 963) .

+ . rr p r e coil mot,h od

6 morno nt.'1 6 .8 to 16 . 7 r.-oV/c

up to 9 '1.nglvf{ - t = 0 . 2 to 1 . O (GoV/c) 2

precision 10 to '1570.

No shrink~.(,o , slopo 0 .086.!: 0.097

1 15 3 Foley e . n. I'hys.Rov.Lott. 1.1., 425 (1963). 172

Rosul t s

pp, m:'.gnctic rno thod , i. e . nngl o "..nrl momentum of sc1:i.ttorvd pnrticlo observed , Dc..tn Givon in t ."..bl os .

7 momontn 6 . 8 to 19 .6 GeV/c 6 nov1 ."..ngles in 1.a_a.i tion to Exp . 1 1 3 3 - t = 0.02 to 0 . 9 (GeV/c ) 2

precision 7%

rr-p S':mo method 7 momenta 7 . O to 18.9 GoV/c 6 new ::.ngks -t = O . O~- to c , 95 (GeV/c) 2

precision 6 - 1 afo +

1T p S.'.',mG i'.lOthod 6 momenta 6 . 8 to 16 . 7 GoV/c 6 neH "..ngl es - t = 0 , 03 to 0 . 96 (GeV/c) 2

procision 6 - 10%.

pp shrink:i.go , slope 0 . 71+6 :!: 0. 060 rr-·p no shrinkn.go , slope 0 . 081 :!: 0 . 073 rr-fp no signific ·1nt shrink".go , slopu 0 .103:!: 0 . 074

Tot~l e l nstic cross-suctions give n , Zero ~nglo extrnpol ·:cion s ov1:1s to como out '.1..bovo tho optic.'.'.l t hoorum point , 08p0cit1.lly for pp .

65/498/5 p/sb

- 6 -

1 16 3 Foley e .n . f hys . R0v .Lutt . -~~· ' 503 (1 963). 172

R0sul ts

pp bo t h m0 t liods

4 rnom_, n t r. 7 . 2 t o 12 . 0 GoV/c 6 - 12 o..nglu::> - t = 0 . 0 3 to 0 . 6 (GoV/c ) 2

K+ p 4 morh,nt·:. G. 8 to 11., . 8 Gc.Y / c 12 - 15 · nglus - t :.: 0 . 05 to 1 .2 ( GoV/c) 2

ICp 2 momont:i. 7 . 2 , 9 . 0 GoV/c 1 O ·'.'...1ghs - t = O . 27 to 1 . 2 ( GoV/ c) 2

pp,,_ non-s i gnific·1nt e:x p n.ns i on ; s l ope -0 .87 .!: 0 .66 K+p shrink"..go 11 0 . 50 :!: 0 . 1 6 K- p no ovidcmco ".bout shrinkn.go

+ t = 0 cxtr"..po l tion i dic"..tos r uci. l pnrt f or IC- .

·------- ------- -·- --------

1 17 4- .Jod i ckson o •. '.'. . Phys3.ov .Lott . ~- ' 485 (1964) . 188

Re sult

Ob sorv".t i on of tho ducci.y f 0 ~ 2rr0

I n 10 GcV/c rr- cha r ge oxcha n go eve nts l n spar k che .. mb c rs t wo cloarly s c pa r c..t od go.mmn pni r s s ol o c t ed , nb ou t 300 uvo nts . 00 . 1 . - t h 1r rr oponine ".nf;, (; in rr p c . ra . sys on s ows n

of "' 5 0 ovGnts ( ~ .. b ovo 50 b nckground) f or just minimum ['.. nt;l 0 fo r f 0

( 1250 i'IcV) . Chock on sum opcnin[; " .. ngfos of th0 tno pnirs .

pcnk nbov0 of tho

f 0 clo cn.y s int o 2rr0, t hus h"..s ove n spin, oven pnri ty ,

oven isospin ( if conserve d) .

1 18 4 :"!c.hl i g .:: .o.. . Phys .:<.c.;-v .r,.., t t • . 1 j , 103 ( 1964). 188

Rosul ts

Tuio r o chnrgc uxch''.n eu ru su lts

17 r.1om<..mtn 2 .I+ to G. 0 GuV / c ( 13 momvnt:i., b u t Viovn 2 .4 "..nd 3 .8 , wi t h 1 a% e rrors , ou tsidc n i th 30/o 1..;rror s )

•1Fo r w1r d 1..;v vnts · oul .., ct1..;d ui t h cos D cm > 0 . 99 ( {) = angle. b e t'1:e:c n b ise:cto r of' g "..;:inn r o..y s "..nd rr - ) . yy opvnint; ".n t.,lc s up to 1 . 16 timos t ho minimum o..c c c. rt...:d , thio cont"'.i r:.s 50%.

( do/ dO) forH1.r d ve r sus p shows c.n I = 1/2 r o s on"..nco at mnss 2 . 6 G-cV/c 2

, ".nd/or t wo I =% rv son:mcos nt 2.4 r.nd 2.7 GoV/ c2

•

65/498/5 p/sb

- 7 -

1 19 3 8odickson o .n . Phys .Rev . ill, B757 (1964) . 56

Re sult

--- -· -----

K-p scn.ttoring i.i. th cylindric ·:-.1 sp~.rk ch"mbors

4 momc ntn. 820 to 1260 MoV / c

16 1.ngl 0s

vrrors 10 to 3ry.;;o

cosn nd Le Evnd r e polynomi 0..l oxv'.nsions, co­efficients up to 5 signif icnnt

Tofo.l v l '1stic cross-se ction show::; 7 mb peak nt 1,0 GeV/c. l•'if' t h powe r coefficients nr o l nrgo t.he r 0 't nd chnne;t~ mpidl y.

~' Tho Yo (1815) r c son1.ncc consists pr ob<.ibly of two l'2 stnt e s of diffe r ent pnrity.

1 20 4 Leipuner e . n . Phys .Rev . Lott • . 11., 423 (196L~) .

'l..,,sults

Son.rch for qunrk production by 28 GoV p on Bo

Detector: counte rs in CACACAC n.rr .nr:;cm0nt with pul su hoiL:;ht discrimin.".. tion

1. 11ehind 1600 e; cm-2 of' o..bsorber, 3 107 po.ssin~ muons found , no quer ks.

2 . without absorber in 4 .5 GoV/c b ..:i run (1 . 5 GeV/c quark momuntum) . No counts .

1 • 1;J u:i..r k s th~'..t clo not couph. strongly to ordinary mr.ttcr less thnn on o in 101 0 pions produce d . Ele ctromngne tic produc tion vrnuld gi ve 500 time s more .

2 • . ;,trongly coupl e d quo..r ks 10ss thc.n 5/101 0 pions produced. Elvctromngnotic production rJOuld give 100 time s more .

Production cross- se ction s ml'..llor th--.n 10-3 4 cm2,

much sm--.lle r th".n ol o ctromngnotic production cross­soction. No qu1.rks lighte r th.'1n 2 GeV/ c 2 exi:Jt ,

65/498/5 p/sb

- 8 -

1 21 2 Collins o.n . I'hys .Ikv • . 1.2J., 2326 (1963) .

Rosul ts

1.!ae,nc tic monopolos p:couucod in 1.n inturnnJ. tnq;ot cmtc r oil ba th through n foil , :cr0 o.ccol l-rn.t8d ''.nd oxtrnctc d by 500 C-.1.uss sol enoid, '.'..lso ·10 kG'.'..uss tri0d.

Dt::tcctor xonon countl,rs <1.nd t:J'ilulsion.

Also monopolv production by photons in tho oil con­sidorod.

Highost fll/' .. ss th'.'..t c ...... n b e pair produce d in nucloon­nucloon collisi on 2 . 9 GoV/c

2•

No counts for 6·101 5 protons

production cross-section in tho to..rgo t < 2 • 1 o-4 o cm2 /nucLon photo production cross-section in H < 1 .3 • 10-34 cm2

in C < 7· 10-37 cm2 /nuclc..u s on tho nssumption of mnss 2 .4 G:oV/ c

2 n.nd <.mor~,y

indepund0nco of thc cross-section, '.'..nd bnrrinh somo speci·:l '1.ssumptions <'..bout mo no pole binding to a.toms n.nd mol uculos .

No Brookhn.vcm r e sults publishcd .

No Brookho..vun r~sults published .

- 9 -

3 . :lEAh INIBRAC'I' IOJ\TS

65/498/5 p/sb

1 2:? 2 Dnnby e " ' . Phys .Ruv . Lott. .2, 36 ( 1962) • 130

Rusul ts ~~~~

.::lp".rk chrw1bur ~-xpu riment

113 uvunts in fiduci.".l volume , r1i th no spnrk in upstr0~tn1 (;,!.ps , l ess than 60° to incident bonm.

49 'short.i trn.cks µ or n 34 ,1 :.bovo 30C McV/ c 22 vurt0x ov0nts 8 shorrcrs

1. electron "nu muon neutrino ~ro di ffor ont

2 . mnss of thu intormodlr:tc: boson gre.:itor the.n 1 trev/ c) 2

3 . thv ve.luo for t hu 010.stic cross-s(; ct i on c ::m be gi von to within 3CJf~ rmcl :.gr oos wi th thuory

4 , t hu inul nstic cr oss - socti on i s of the s rnno order of :n.:.gni t udo

5 • . :.v0rl'.gu t r l'.nsvor so momu n t um 350 , oV/ c

6 . no neutrino flip .

1 23 4 Christonson u.~ . Phys .Ruv . L(.,tt . 11 , 1 38 ( 1764) 181

Resul t

H0 b,:.g is i r rn.di:l.tod by n K~ b onrn . ~ff<.,ctivo mass of pi on pr.ir s originating in it cnl cul o.tod f r om direction nnd rno1nc.n t um of t.hu pi on s . I n mass r .:.ngo cor r cspond­inG to K m'l.s:> (2 body docny) t he ".ngulnr di strib ution shows n 45.!: 9 -.;vc.nt p0n.L of 4 . 0:!.: 0 . 7 mr~Ld \lidth round 0° , outsi do this ITk.:.ss r o.ngo no s uch po'l.k . Mnss {l.nd width of p<.,t'.k ngroe with I~ deco.y f r om t un1.>ston r csunerntor plncod nt locntion of Ifo brig . Tfolium re ­gonor a.ti on much too woal· to exp la.in tho effect . Also data r1ith hydrog0n -W.rgct .

K~ shon 2-b ody docny , br:-- nching ro.t i o 27T/ chc..rgcd = (2.0:!:: 0 .4) 10- 3 corresponding to an :idmi xturo <£of

tho wrong CP nnvu in tho K~ of 2 , 3 • 10-3•

I n hydrogen tc.rBe;t 45:!.: 1(1 2-body decays , 10 cnn be att ributed to cohorunt r ee,onc.r" tion . Host consistent with Hu r 1.. sults , but too snr.11 by f.'.'..ctor 15 to confirm Ade.ir ' s obscrvntion ( Phys . Rev . -~ ' 2285 (1 963) .

65/498/5 p/sb

- 10 -

1 24 4 Abnshian c . n . Phys .Ruv .Lctt . J], 243 (1964) . 106

In 1' run fornrn.rd pc.:-:.k soon in m'l.ss rt~ngo 500 to 03 ? ( ) 510 r.loV/c could bu 495 to 505 , 1~. mr ad wi cll.; ,

14 events in pc -::k .

No significe.nt po·~k in K run . /13

If there is u. CP viol c~tion them E ~. 2 . 2 • 10-3•

1 25 4 Fuji o . n . Phys .Rov.I.ott . 1,2, 253 (1964). 116

Hosult

I~ r ot:,enorC'.tion in Fe sle.b of varyinc thickness, to find J~ - 1\b moss difference from .i.nterforcnce patt ern .

6 thicknesses 3 to 25 cm

45 , 000 ov0nts n.nnlysoc:i , 1600 i n 12 mrad forward nngle .

Mu.s s dif fe r ence ( 0 . 82 :!: 0 . '12) h/ t 1

~ = 0.89 • 10-1 0 sec = K~ lifetime.

This r e sult ch.nn g0d by 9% for 0 .3% GP viola tion.

4 . nELATIVITY

65/498/5 p/sb

- 11 -

l'~o Brookh:ivun oxpurirn(; nts publ isho d.

- 12 -

APPENDIX II

P3 com~TER EXPERD:IBNTS

1 • STRONC:- INTERi\.CTIONS

65/498/5 p/sb

~~ ..... •"- • • L. ,,_. --~- . ...._ ----...

2 01 0 V. Cocconi e . a . Phys .Rov .I.ott . ~' 19 (1960) .

Rosul ts

25 GcV p on Al 'tnd Pt tc.rget. Time of f light spectra nt 6 mom0nta botnoen 2 and 5 . 5 GcV/c, under 15 . 9° . n- momentum spe ctrn given for Al.

Doutcr ons found .

p/1F+ ro.tio rising from ono to three v1i th rising momcntwn. d/1f+ risi nc, f r om 2 to 6% in Al , from 6 to 1 CJ/o in Pt . d/p c.bout constn.nt nt 2% for Al , 3% for Pt .

K+/1f~ 1% nt 2 GoV/c , IC-/1r- O . l~?~ ; at tc..rgot about 25 times ns mnny.

p/ 1r- 0.4 to 1.5%.

nntiproton m.1.ss 1 . 008:1: 0.005 t imes proton m<'.ss.

No <'.ntideutcrons soun

No other pnrticlos of ,.-.,bundrm co nbove 0 .17;; of tho pions.

--- -· -----------------·---

2 0 2 3 Ji'iclccf'.ro 0 . 11. Nuovo Cirnento ~J, 476 (1963) .

Results

d 1.nd nlphr. procluction in H, by C- CH2 difference. 26 .6 GeV/c protons used, 11.25° lc.b . "'..nglc, 1l~80 and 1550 \\ioV / c particl e morn.:. ntum. Alpha used n::i

monitors for nuclonr internctions in C, sinco kinoma.ticC'.lly impossi\)10 from E .

q/cYc = - 0 , 027 :1: 0 . 035 , thus little diroct d pro­duction. 98% conf . limit on 1550 HeV/c cross­se ction from H: 34 µb/sternd GoV/c . Vo.luo from C, 1560 µb/stornd.

65/498/5 p/sb

- 13 -

2 03 0 i.L Fidecaro u , 1: .• Nuovo Cin11.mto 19, 382 ('1961) . B5

R"sults

;3u1~v0y of nGutr".l pti..rticlvs usin;:, :t tot,:cl nbsorption Cerenkov spuctromctor.

B0 nnd Al used, ~t j ,21° for 10.5, 17 .5, and 211 .5 GoV proton unore.y spectrn from 1 to 16 GoV.

At 1~.9° nnd 2l,. , 5 GcV spectrn from 1 to 5 GcV .

Also neutron flux '1nd C'ttenuntion meo.surumonts .

Yinl<l from Be 1 ,5 timos f\.l. Comparison with tho st:-tistico.l modol using isotropy in th0 c .m. s . shmrs tho.t th0re is :.'.. forward pen.king . Ro.to do­cronso with prirri.ary ene rgy n.nrly componsntud by higher r epetition rate.:, y/n ['..bovo 2 GeV 2 . 2:': 0. 5

Attenuation curves for y give 50 10 61

o.ttonu.;.tion length in carbon t1 .l in l end

for n II II Tl in lithium 11 8 11 II in l ead

-------~ . . - -- ----- ··---· ~-------

2 04 1 M. Fidocar o o . o. . Nuovo Ciinunto 24, 73 (1962) . B5

Results

Same a.s 2 03 0 nt 23 .1 GoV on hydrogen under 1 • 75 , 3, 6, 1 0, 15, und 27° .

Also some Bo o.nd Al do.to. .

Spcctrn n.bout oxponontinl , c . m. o.ngul.::i.r distributions puakod forrn:i.rd . o/nuclL;On 1 .4 times smnller in Bo thnn in H. In Al 1 • 8 times •

IntcGration ovor o.11 solid nngll; givos good agr eement vri th lbgodorn' s stn.tistical model .

2 05 3 Diddens o . a . Nuovo Cimcnto 21, 961 ( 1964). N4

Results

Charged pa.rticlo S~L;ctrn from H under 116 mra.d , at 19 o.nd 2l1- GeV / c . C0runkov nnd timo-of-flight.

rr 0.5 to 6 . 77 GeV/c 17 momenta. rr ·1 O.L.i-8 to 7, 96 22 11

K..!: 1 • 75 ' 2 .40 p 3,35 , 4 .60 d 0.96 to 9.2 p 0 .48 to 6 .5

Cross-suction tabulated . ~d > 0 nbove 1 .9 GoV/c . Compc.rison vii th statisticnl model poor . d with lnrgu tro.nsvcrso rnomontum found .

65/498/5 p/sb

- 14 -

1 .2 Total cross-se ctions

2 OG 0 Ashmore e . a . Phys .Rev .Lett. ,,'2 , 576 (1960) .

2 07 0 von Da rdel D2 ,

2 08 1

Results

v on Dardol D4

Re sults

p- p CH2 -H difference method, 8 points 9 . 9 to 28 . 4 GoV/c, errors 1 .5 rnb .

p-d 3 points errors 2 rob. At 25 GcV also Be, C, Al, Cu, Cd, and Pb.

pp flat above 10 GoV/c at about 40 rob , pn at 36 mb. For the nuclei good fit with

1/3 2 <:J = 1T ( ro 11. ) ,

using r 0 = 1 . 26 Fermi .

Phys.Rev.Lett. 2, 333 (1 960)

p ,-:> points 4 . 6 to 11 GeV/c

p 6 points same range K- 3 " 4 , 5, and 8 11

K+ 4 ii 3, 3 .5 , 5, and 8 rr- 13 ., 4 . 5 to 10 rr+ 2 " 5 , a nd 10

prec . 2 mb

2- 5 it

1-3 0 .5 , l a rge mu correction 0 . 5

p flat a t li-2 rob, fl falls , K- falls f rom 30 to 25 rnb , K+ from 23 to 20 mb ( a t 5 GeV/c), t hen flat , rr- drops initially to about 30 rob , rr·1 to 26 .

o . a . Phys . Rev.Lett . ] , 127 (1961) .

+ rr- Li- points , li-.5 to 10 GeV/c , pr ec . 0 .4 mb muons e liminated .

A slight drop , difference of the two charge sta t es decreases only very sl0\'1ly . No asymptotic behaviour.

2 09 2 von D:-:rdel e . a . Phys .Rev . Le t t . _§ , '173 (1962) . D4

Result s

f-

7T- 5 points , 10 to 20 GeV/c, precision 0 . 3 - 0 . 7 mb .

Dit'fe r t)nce cons tant within precision . Fit given .

65/498/5 /p/sb

- 15 -

2 10 2 Diddens e . a . Phys.Rov . Lett. 2, 32 (1962).

Results ~----· -

pp and p"n" C-CE2,re np. rhO-D20 difference. 4 points 4 .• 37 to 7 . 75 GeV/c . precision 0.7 to 1.1 mb in pp, 0.8 to 1 . 6 mb in pn .

pp f alling, pn i'lc...t, tho 4- mb Glauber correction eliminates the difference ab ove 3 GeV/c.

-- - -·--------·-------- - ·------- ------ -- - --------

2 11 4 Amal di e . a. Nuovo Cimento .2_4;, 825 ( 1964) . F3

Result

pp 30 points 0 . 575 to 7.8 GeV/c, errors 0. 25 to 7 . 8 mb , also some differ ential cross-sections.

Smooth drop.

2 12 1 Cocconi e .a . Phys. Rev . Lo tt . 2, 231 ( 1961) . G3

Results

Scattering of protons off internal Be target. Obse rvation under 60 mrad at 9 momenta bet~·reen 8 . 95 and 25 . 0 GeV/c , also at 20 mra.d 25 GoV/c , 40 mrad 16 and 25 GeV/c . 30 point spectra taken rd.th 1% resolution. Relative errors 20'/~ .

Elastic pe<ik, quasielDstic peak and quasiclastic continuum observed . The quasielastic r,eak is there whenever tho elo.stic is observed . At 22 and 25 GeV/c bot h vanish . Dis tu.nee of the two peaks about 1 GoV. "Diffraction disintegration" of the nucleus?

- 16 -

2 13 1 Cocconi C3

c . a . Phys . Rev . Lett . ] , 4-50 (1961) .

Results

- - - ---- - -----

65/4-98/5 /p/sb

2 14- 2

2 15 2

Diddens e . a. C5

Results

Diddons e . a . C3

Results

As 2 1 2 1 intornnl beam now on CH2 and C : r esolution (o . 6%) . 56 , 5 and 60 . 5 mrad lab angle .

better

13 momenta for p botween 13 and 27 .8 GeV/c -t 1

' 0. 52 and 2. 37 (GeV/c) 2 .

Statistical errors 5%, syst. 50~ .

ontical 1. the quantity X = (d~/dt)/(d~/dt)t:o

plotted as a function of t fans out ab ove -t = o.6, becomes explicit function of momentum .

2. tvro ttuas i ela.stic peaks observed corresponding to eff ective masses of the recoiling system of 1. 51 :!:0.01 and 1. 69:!: 0. 01 GeV/c 2 •

Phys . Rev . Lett . 2, 108 (1962) .

External p-beam on H t a rget, scattered p analysed, 5% r esolution, che cked vri th 1%. Elustic scattering only.

5 momenta be t Heen 12 .1 and 26 . 2 GeV/c 5 angles beh1een - t = 0. 011 t o 1. 055 ( GeV/c) 2

errors 20 to 30~ total elastic c r oss-section calculated, using optical theorem point for 0° extrapolation . ~rrors 10 to 1 5?J·

Total e l astic cross-section fall s be t ween 2 and 6 GeV/c from 20 to 10 mb, then stays constant up to 26 GeV/c.

Phys.Rev . Lett . 2, 11 1 (1962)

Continuation of 2 13 1 Rt 110 mrad, elastic sca tter­ing only.

7 momenta 8. 9 to 23 GeV/c - t = 0. 91 to 5. 55 (GeV/c) 2 .

Dat a tabula t ed with r e- evaluations of' 2 13 1 .

Shrinka ge: a(t) in the expression

X = F(t) (s/so) 2 a ( t)-2

falls b et neen t = 0 and - t = +1. 5 (GeV/c )2 from 1 to - 0. 7, then less . Slope about +1 .

65/498/5 /p/sb

2 16 1 Cocconi e . o. . S19

Rosul ts

2 17 3 Co0coni e .a. S25

Re sults

2 18 3 Cocconi u.a .

Re sults

- 17 -

Phys . l~ev . . 126, 277 (1962).

i.: i n terncl on C, CH2, and CD2 , observation unddr ~6 . 5 and 60 mr~d . For 12 momenta 13 to 26 GeV/c cn.rbon c ross-se c ti on given . At 16, 18 . 3 c.nd 2C. G ... N/r: 25 point C spe ctrn tr1kon> f~t 1.'L31 G. V/c u.lso D s1.;octrum.

In c a rbon t h•3 0lastic pent i s bron.dened and s hifted to~Htrci.s higher ene rgy \Ii t .: r espe ct to fre e pp collisions . ;~t 26 GeV/c it splits. Agr ees id th double s ca tte ring 9r edi ctions .

In deute rium t ·. rn distinct peaks, one shifte d to highereneI'"gy by % the recoil loss . Double scattering or D r ecoiling as <.L whole?

Phys .Lett. 1, 222 (1963) .

p + p = rr + + d. Usw1l internal C-CH2 target method, deute ron obsorvod unde r 60 mrad. 1% r esolution fiv e spe ctra from _) . 6 to 8. 9 GeV/c . d shows up as a peak above pp elastic pee .. k. Che cks : d time of flight l'md mis sing mass equal to pion mass .

Cross-secti on f nlls from 129 to 5 µb ar/sr (lab) . Together v.ri th published data a t lower ene rgy, a pee..k in the momentum distribution a t 2.9 GeV/c 2 (mass scale ) shows up . It can b e an angular distribution effect or Q diba ryon r esonance. N+ N~'(1920)?

Phys . Lett . ~ ' 134 (1964 ) .

:::ntorna l C and CI-h target, inelastic studies unde r 60 mra d . 9 momenta 3 . 6 to 1i.8 GeV/c . 25 point spectra, 17 r e solution -t = 0.046 to 0.49 (GeV/c) 2

•

Quo.sielastic peaks obse rved. U:p top = 7 . 7 GeV/c (3/2, 3/2) r esonan ces visibl e , excita tion function drops rapidly (p exchange) . Anothe r peDk 2t mass 1 . 69 GeV/c2 ( 1/2, 5/2) plus a peak moving from 1 . 4 to 1 . 5 GoV/c 2 (1/2, 3/2) (?). Thos e peaks increase with increasing momentum.

A new isobar c t 1 . 4 GeV/c2?

Ba ckground sub t r action attempt e d .

65/498/5 /p/sb

- 18 -

2 19 3 Backenstoss e .a. Nuovo Cimonto 32, 14 (-1964).

2 20 4

S5

Caldwell S1

Results

pion- charge cxch .... ngu at 8 . 9 GeV/c, Gm.i!ne. spectra given for 5 angl es up to 1 . 75° , 6 momenta up to 8 GoV . Neutral pion spectra tuntatively ducluc0cl. Also carbon data .

e . a . Phys .Lett . Q, 288 (1964)

Elastic scn.ttoring of p, 7T+, 1T on II .

Obse rved : direction and momentum of scattered particle a nd direction of recoil.

1T- 3 momenta 8 . 5 to 18 . h GeV/c 17 angles -t = 0 . 13 to 0 . 50 (GeV/c) 2

3 to 1 O'}b e rror . +

1T 2 momenta 8 . 5 and 12 . 4 GaV/c same angles . ·nd errors as above

p same points as for 1T •

Total elas tic cross-sections c~.lculntud.

1T- slope of a(t) 0 . 06±0 . 14- (GeV/c) -2

, no shrinkage r=1 . 07±0 . 15f

1T + slope 0 . 24 ± 0 . 50 no shrinkage r = 1 . 05±0.20f

p slope (0 . 45± 0 . 22) shrinkage r = 1. 098± 0.013 (8 . 5 GeV/c)

1 . 127 ± 0 . 016 (12 . i+. GeV/c) 1 . 107 ± 0 . 021 (18 . 4 GeV/c)

all oxtrc..polation to t = 0 somcnhat low (belovr optical point) .

65/498/5 /p/sb

- 19 -

2 21 2 Cal dwell BS-82

e . a . Phys .Lett. ~' ~53 (1962).

Results

2 22 4 Dekkers o . a. 827

Ro::ml ts

2 23 2 Dmoll e . a . L2 S20

Results

DJ.boson expurinwnt. + -1T + 1) -> F' + 1T + 1T

......... + -:» N" + K +K

12 a nd 17 GeV/c,CH target

J.Ie.gnotic a nc.lysis of tho t wo bosons . diboson mass def 1ni tion ± 10 i'leV rms . In 219 ev ents a p peak at 725 !.leV narroHer than 40 iieV. AnothDr peak fl t 885 ~1IeV (6 events) needs confinnation . Not cortnin whc~the r 7T7r or KK.

p found slightly lmi and nnrrm.'er the.n at lm1er ene rgies . Absence of final sta t e inter a.c b ons since p so fust? 885 l'.foV reson~nce indicated.

Phy s . Lett. jJ_, 161 (1964) .

7T++d-> p + p , the inverse r eC1ction to 2 17 3 . Ce r enkov id.entificvtion in incident 1T b eam, t . o . f. id0ntific~tion of protons.

8 momenta 0. 65 to 1.95 GeV/c 6 a ngles 0 ~ 90° c . m. e rrors 10 to 20%.

diffe r ential forv1ard cross-s ection shows val l ey a t 2.5 GoV/c 2 ( d:i.baryon mass scale ), peak l' t 2 . 8 . But tho total elastic cross-section sh o·Js no structure. Discussion in terms of 1Tp resonances.

Phys .Lett . 1, 53 (1 962) .

Strnnge pr::.rticlG s pectroscopy.

rr - + p -> Y'~ + K+ . K momen tum analysed a nd Cer enkov i dentifie d. 38 momenta 1 to 4 GeV/c K at 0 . 94 GcV/c fixe d moment-um and at o0

e rror 5%. Also observ~tion of 1 . 8 GeV/c p, to look for boson r e sonanc es . 1% e rror .

E-, Yt(1385) and anothe r r e sone.nce seen. backward siem.:t cross-section 10 /lb/ster ad.

11 Y'~ 11 11 3 to 5 µb/s ter ad, widt h ± 30 i"ioV. Possible no\; resonanc e 1550 ± 20 i'leV mass, vridth like Y*. In backVJa rd boson s earch no r e sonances s een . Back-ward elastic s catte:;:·ing 0 . 2 mb/stor a d (c.m . ).

65/498/5 /p/sb

- 20 -

No C:i!:RN counte r r esults i,;ublishvd.

- 21 -

2 . ELECTROIVIAGNE'l'lC I N'rJ•;R11.CTIONS

65/498/5 /p/sb

-·--""-------.. - - ----

2 24 1

2 25 1

H. ]'ide c'l.ro B6

Re sults -~-·-

e . a Nuovo Cimm to 2~, 657 (1961) .

1. A 2 kG solvnoid viow~2 cm Cu plLte irradiated by s oc onde.rios from internol t a rget . Argonne scintillation counters de t c::ct ioniZ[' ti on above 35 HeV . Exposure 6 x 10 1 3 p of 19 Gr)V.

2 . Other subs t.::::nce s irradi\:• tod by 27 . 5 Ge V protons paramagn~tic Al (3x 10

14 ~) di~magnetic CH (1 . 5x 10 1 p) Cu + pnr .'.'fi'in mixture (ncgativt~ magn. susceptibility) (6x1012 p). The s e substnnces first irradiated thon extraction attempt ed .

3 . Search for annihilation of monopoles. Irradia tcd

No

1 • 2.

3 .

sample s (s•w 0ral 10 14 p) put in front of de:tector, also molten to stimulate annihila tion.

events found.

() < 10-3 7 cm2/nucleon . 10-39 -36

() < for Al and CH, 10 for Cu+ CH under assumption of mass < 2 . 8 GeV/c 2

•

() < - 35 -36 10 .

i':i . Fidecnro e, a. Nuovo Cime nto 23, 800 ( 1962) . B8

Results

Absorption of 10 GeV photons in H and C. 13 . 5 GeV photon in Li , C, Cu , Pb.

In oach ca.se two or three absorber thickne sses . Doh:ctor : pair s pec trome t e r, symmetric pairs accepted.

Absorption coefficients in rob H 18.7±1.2 C 347± 12 a t 10 GeV Li 106 ± 6 C 373 ± 12 .1.t 13 . 5 GeV Cu 6300 ± 130 Pb 41890 ± 1000 agrees \·1ith theoretical predicitions quoted.

65/498/5 /p/sb

- 22 -

2 26 2 Fa.biani o . a. Nuovo Cimento 25, 65) (1962) . B3

Results

Positron annihilation i n flight. Homen tum anD.lys..:d positrons annihiln te in target, then total abs orption Cerenkov counter (after anti) . targuts Be end Al , tv;o thickness clS c~uch .

targe t out eff ect up to 2()%.

energy 1. 9~-5. 8 7 . 71 9 . 61+

<r/el ectron o. 520 ::!: o. 014 0. 198::!: 0. 007 0.1 54::!: 0. 005 0. 128 ± o. 007

agr ees vlith theory (better if 3 to 4% radiative correction is not made) .

-1 % QED cut-of f l ength : A < 0. 3 f 950 confidence.

---------------------

2 27 1/2 I3nclcenstoss e . a . Phys.Rev . Lett . 6, 415 (1961). Phys . Rev . 1 2~, 2759 (1 963) . H2

Rosul ts

µe scattering withµ pol arized to 62% at 7 .1 GeV/c 8510 i::.t 8 . 0 GeV/c

in m~gnetizod iron. - 1

b eam intensity about 1000 s ec calculated csymmetry up to 1. 8% i nstrumenta l 1'.symmotry up to 0 . 5% measured rt 5 energies 0 .4 to 1.07 time s maximum energy.

µ helicity is o . 80± 0 . 31, 5. 8 standa rd devintion from - 1, compatible with +1 . (In Lett er: 1.1 7± 0.32). Energy loss distribution a erees with calculated one to 3% ct higher energies.

-1 A < 0. 64 f .

2 . 3 ~!~2!~2~~B~~!~2-~~~2!~~~

2 28 3 von Dardel e . a . Phys . Lott.~' 51 ( 1963) . D6

Rosult

Lif etime of the neutrc l pion . Pair production in foil of t h ickness compa r c.ble to decay l ength. Because of internal conv.:rsion quadratic term in decay l ength has to be measured. Positrons detec t ed. 4 f oil thickness es 3 t o 58 µ

De cay length (1 . 5 ± 0. 25) µ - A. 7'. 2 effect about 1. 5%. _ 1

6 r 0 = (1 . 05::!:0 .1 8) 10 s ec .

Tr

65/498/ 5 /p/sb

- 23 -

2 29 3 Convors i e . n . Phys .L, tL 2, 195 (1963) . s 11

Result

Time-like structuro cf t he proton by n.nnihilc. tion of 2. 5 Gl;V/c p i11to ._· l e ctron v1irs . Pulse he iGh t, sho ·t;r de t ector t•nd kin0mat:i cs .

No ov <.mt founc'l .'h t.Jr ,J three expl;ctod for point­l i kc proton [(d~/dO) . t = 2x 10- 32 cm2/ster~d nt 90° c . ra.]. poin

65/498/5 /p/sb

- 24 -

2 30 4 Faissner e.a . Phys.Le tt •. :Jl, 80 1964.

Results

1963 .s.nd 19Gl1 1 ·x porime nt in spark ch::unb.J rs 196 3 40 triggers and 18 eve n ts/h 1964 60 trigg .;rs Md l+O ov onts/h

1 . Elastic µ event r a t e. 418 e lastic µ ev ents or 5. 8 events/t Expe cte d: 3. 2 under the assumption (0.84 GeV/c cut-off) and vector form axial v <Jc tor form f<~ctor

d 16 an 10 p. of eve factor =

Limits on AV f orm factor cut off i:~: O. 5 ;, HA 5, 1 . 5 GeV for no inte rmediate boson.

2. Elastic e ev ents: 39 found or (1 . 7 :!: 0 . 5)~& of µ events expected 100% for only one neutrino

8% for neutrino f lip. 0 . 6% from K- e decays.

So less than 1/G e neutrinos fr om rr decays ~ µ

20% e neutrinos from Kµ decnys (no neutrino flip . ) electron AV form factor similar to muon 1'...\T form factor, not unity .

3. Sign analysi0 (2 . 7 :!: o.6)% positive trMks found 2% expect ed from a ntineutrino decay. So l epton cons e rve.tion if violated with amplitude a ( which occurs t1icc) limited to a 2 < 0 . 01 .

2 31 Ii Bc rnt.' rdini e . n. Phys. Lett. _1], 85 ( 1964) .

Results

i'uon pnir ' nc.lysis , in exp. 2 30 1, .• 350 cr:.ndid:1 -Lu,;, Tith one prong having a r r.n ge r•. t least 1. 5 tim (;S t !10 nuclenr m2nn free vrth A, the othvr at lo<'S t 0 . 8 A.

1 . 92 inte r a ctions in the s e prongs obse rve d , -.:here from ca librations •:;i th p nnd pions a t l ac.st 96 cxpoctud . No evidence for µ pairs .

2 . Sign analysis: no pairs \\ith r ange ofµ+> 7A and r r.nge of µ > 2 . 4A, nherel'.s from the spectrum of elnstic oven ts, and for an inte rmedi .. ·t e boson muss of 1. 8 GcV/c 2 4 or 9 such e vents expect ed (depending on spactrum) so the pairs do not have the right sign distribution .

3. µo events. Less than 3 ge nuine one s found, wh e r eas 6 to 1G oxpected for 1.8 GeV/c2 boson .

So if l optonic and non- leptonic d ecay mod e of boson comp2. r11bl o , no inte rmcdintc boson light e r than 1. 3 GcV/c 2

•

65/1+98/5 /p/sb

- 25 -

2 32 4 11'0.issn0r e . a. Nuovo Cim._,nio )~ 1 782 (196li) .

Results

Sonrch for e.no!'.l~lous noutrino int· r nc ti.on, in 2 30 Le :1700 kc orgnnic scintillat or in neutrino b eam, 240 kg frc..:c, protons. L ookc.d for ,, v mts vn + p -'> vn + p, rri th n. r roton energy in c..:XC'-1f~s of 15 ·,i0V.

30 cv .. mt s found in proper timint; (20 nsoc int .~rvt'.l) All considur ccl L~s bcc:1 ground., since docroc.se, if shi0lding incro~n0d. _37 If cross-suction oncrgy independent, it is < 2 x 10 cm2

•

If energy do1~,.mdence as sugg~;s icd by Okun < 1 x 10- 3 7 cm2

at 1 GeV/c . _ Al so " limit on Y 11 + n -'> B -'> 11 + f B hns to b0 heavier than 4 GoV/c .

No CERN experiments published.

- 26 -

4 . lU~LA'.LIVlT\

2 33 l+ All.!1:igor e . e . . Phys . rJutt . J~~' 260 (i96l~).

65/4-98/5 /p/sb

H.esult

Check on const<'11 cy of c. Time-of-fl Lght of gcmmc. f'rorn 1T') d.:;cay in flight mec:.sured unuer bunchod PS operr:..t:i.on.

If vclod ty from s ource moving vr.i tl1 speed v is given by c / = c + kv, then k = ( -3 ~ 1 3) 1 0 - 5

.:_ 6

Astronomical me ccsurcmonts put a limit on 10 on k.