Making Sense of Jet Radiation - Heidelberg Universityplehn/includes/talks/2015/ipm… · IPMU...

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Making Sense of Jet RadiationA Series of Great Lessons

Tilman Plehn

Universitat Heidelberg

IPMU 3/2015

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

WBF Higgs production

Higgs production with jets [w/ Rainwater, Zeppenfeld (1998)]

– the Pheno team (1997)

–

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops



– first paper to use WBF forward jets for light Higgs [ask Dieter and Dave how it all happened]

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops




– technical advances crucial [jet veto from 3jττ process]

– detector simulations by hand [correct is what experimentalists can reproduce]

– b and τ decays fully simulated

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops







⇒ Great LHC ideas also need hard work

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops








What to do with jets

– background control makes the difference

– tagging jets

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops










– tagging jets

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops










– tagging jets

– central (mini-) jet veto

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops










– tagging jets

– central (mini-) jet veto

⇒ Jets are your friends

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Catpiss collaboration

SUSY off-shell diagrams [w/ Kilian, Krauss, Ohl, TP, Rainwater, Reuter, Schumann (2005)]

– from Madgraph to SMadgraphalso Sherpa → Sherpino, Whizard → SWhizard

– including off-shell diagrams...

...up to bbbbχ0χ0 production...

...plus reference tables...

...15 pages of them...

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops








Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops








⇒ BSM physics deserves proper simulation

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops









SUSY in weak boson fusion [w/ Cho, Kanzai, TP, Rainwater, Stelzer (2006)]

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops










– meant to test SUSY properties

– Majorana property in χ±χ± production

– first task: huge squark/gluino background

– second task: proper UV behavior

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops














Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops














– at 100 TeV? [Takeuchi etal, Wang etal]

WBF σ(χiχj+jj) = ●<10-4 || ●10-3 || ●10-2 || ●10-1 || ●1 || ●>10 pb

-4 -3 -2 -1 0 1 2 3 4

m@TeVD1234

M1@Te

VD

0

1

2

3

4

M2@Te

VD

tan β=10

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops














– at 100 TeV? [Takeuchi etal, Wang etal]

WBF σ(χiχj+jj) = ●<10-4 || ●10-3 || ●10-2 || ●10-1 || ●1 || ●>10 pb

-4 -3 -2 -1 0 1 2 3 4

m@TeVD1234

M1@Te

VD

0

1

2

3

4

M2@Te

VD

tan β=10

⇒ Attobarn is a unit for LHC rates

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Tagging jet correlations

Mother of tagging jet analyses [w/ Mawatari, Li (2009)]

– one of my most fun papers... [TP, Rainwater, Zeppenfeld (2001)]

0

0.002

0.004

0.006

0 50 100 150 6\jj

dm/d6\jj (HAoo) [fb]

SM

CP even

CP oddmH=120 GeV

ZAoo

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops




...but not the proper job...

– ∆φjj sensitive to vertex structure

φ1 + φ2 sensitive to spin-2

– UV sensitivity: pmaxT cut, form factor, model at face value?

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops








Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops








– I am too stupid for this paper

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops









Going slowly [Englert, Goncalves, Mawatari, TP (2012), Godbole... (2013), Maltoni, Mawatari... (2013)]

– step back: it’s just Cabibbo angles

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Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops











0 2 4 60

0.2

0.4

0.6

Γ d∆φ1 dΓ

0-

D5

0+

D5

0+

SM

2+

0 2 4 60

0.2

0.4

0.6

σ d∆φjj

1 dσ

0-

D5

0+

D5

0+

SM

2+

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops











– few observables key...

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Tops plus jets

Heavy quarks plus jets [w/ Mukhopadhyay (2013)]

– t t and bb + 2 QCD jets

– threshold production necessary

m-1

dm

/d(q

1-q 2

)

(q1-q2)

Mt}t < 400 GeV

Mt}t > 600 GeV

0.06

0.12

0.18

0.24

0.3

0.36

-/ -//2 0 //2 /

m-1

dm

/d(q

1+q 2

)

(q1+q2)

Mt}t < 400 GeV

Mt}t > 600 GeV

0.12

0.14

0.16

0.18

0.2

-/ -//2 0 //2 /

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Tops plus jets



– threshold production necessary

dm/d

(q1-q 2

) (fb

/0.3

14 ra

dian

)

(q1-q2)

Mb}b > 400 GeVb}b + 2-jets Total

q q b}bq g b}bg g b}b

50

250

450

650

850

1050

-/ -//2 0 //2 /

dm/d

(q1+

q 2) (

fb/0

.314

radi

an)

(q1+q2)

Mb}b > 400 GeV

b}b + 2-jets Totalq q b}bq g b}bg g b}b

50

250

450

650

850

1050

-/ -//2 0 //2 /

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Tops plus jets



– threshold production necessary– series in ∆φ truncated by available helicities [Buckley, TP, Ramsey-Musolf]

dσd∆φ

= A0 + A1 cos ∆φ + A2 cos(2∆φ)

– sign of A2 set by spin of (s)tops

– 3-jet merged stronger correlated than 2-jets exclusive

⇒ The fun will start with Run2

0 0.5 1 1.5 2 2.5 30

0.02

0.04

0.06

0.08

0.1

0.12

>3

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Tops plus jets




dσd∆φ

= A0 + A1 cos ∆φ + A2 cos(2∆φ)




Heavy quarks plus jets [w/ Nakamura (2015)]

– CKKW-L merging up to 3 jets [MLM too time consuming]

– comparison of 1,2,3 hard jets

-3 -2 -1 0 1 2 3

0.10

0.15

0.20

DΦH1,2L1

�Nd

N�dD

Φ

k¦

>30GeV, 3-parton

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Tops plus jets




dσd∆φ

= A0 + A1 cos ∆φ + A2 cos(2∆φ)







-3 -2 -1 0 1 2 3

0.10

0.15

0.20

DΦH1,2L1

�Nd

N�dD

Φ

pT>30GeV, ³2jets

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Tops plus jets




dσd∆φ

= A0 + A1 cos ∆φ + A2 cos(2∆φ)







-3 -2 -1 0 1 2 3

0.10

0.15

0.20

DΦH1,2L1

�Nd

N�dD

Φ

pT>30GeV, ³2jets

⇒ It helps to get your LHC tools right

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Tops plus jets




dσd∆φ

= A0 + A1 cos ∆φ + A2 cos(2∆φ)







⇒ It helps to get your LHC tools right

Jet Radiation

Tilman Plehn

WBF

Catpiss

Tagging jets

Tops

Outlook

Thank you, Kaoru!

Great LHC ideas also beed hard work

Jets are your friends

BSM physics deserves proper simulation

Attobarn is a unit for LHC rates

I am too stupid for this paper

The fun will start with Run2

It helps to get your LHC tools right

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Making Sense of Jet Radiation - Heidelberg Universityplehn/includes/talks/2015/ipm… · IPMU...

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