Teruki Kamon

on behalf of the CMS CollaborationMitchell Institute for Fundamental Physics and Astronomy

Texas A&M University

Mitchell Conference on Collider Physics, Dark Mateer, Neutrino Physics

21-23 May 2018, College Station, TX (United States)

1May 23, 2018 CMS SUSY

[Credits]

Images of Baryon Acoustic Bscillations with Cosmic Microwave Background

by E.M. Huff, the SDSS-III team, and the South Pole Telescope team. Graphic

by Zosia Rostomian (Lawrence Berkeley National Laboratory)

Image of Neutrino Astrophysics, taken from https://astro.desy.de/

Image of the LHC by CERN Photo

Image of Bullet Cluster by NASA/ Chandra X-ray Center

Search for Supersymmetry

at CMS

CMS Operation and Papers in Numbers

Teruki Kamon 2CMS SUSY

Schematic view of the 12,500-ton CMS Detector with its main components.

𝑁papers

ℒ𝑖𝑛𝑡

50

100

25

CMS Physics

Teruki Kamon 3

https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResults

https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsSUS

https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsEXO

https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsB2G

Particle IDs with Particle Flow – JINST 12 (2017) P10003

1) Tagging energetic jets (+ MET) from cascade decays

2) Tagging leptons3) Tagging photons4) Tagging with timing5) ISR jet(s), VBF dijet6) …

Triggers – JINST 12 (2017) P01020

links

CMS SUSY

𝐸𝑇miss

𝐸𝑇miss

D4 = Digging Down, Down, and Down

Teruki Kamon 4CMS SUSY

[1982] W and Z with 𝒆, 𝝁Now full measurements

[1995] 𝒕 ҧ𝒕 with ℓ + 𝐣𝐞𝐭𝐬/𝐛 + 𝑬𝑻𝐦𝐢𝐬𝐬

Now full measurements

σ

𝟏 𝐟𝐛

[2012] H(125) with 𝛾𝛾, 4ℓNow full measurements

CMS Preliminary

This demonstrates the CMS detector is functioning well to test the SM.

Teruki Kamon 5CMS SUSY

Deviation from the SM

SM

Shadowsof BSM

The SM is successful in explaining a wide variety of physics, aside fromtwo to three standard deviation effects, despite possessing “structural”defects.

Supersymmetry (SUSY)

SM BSM

Nature of colored and non-colored sectors?

Teruki Kamon 6CMS SUSY

The SM is successful in explaining a wide variety of physics, aside fromtwo to three standard deviation effects, despite possessing “structural”defects. So far, no sign of “Beyond the SM” (e.g., SUSY) in very diversesearch programs. SUSY in splitting scenario? Compressed-mass spectrascenarios? We should continue studying various challenging final states.

© S. Kamon

0

1 ( B, , , )d uW H H 1 ( , )dW H + +

1 ( , )uW H

LHC SUSY Probe Metric

Teruki Kamon 7CMS SUSY

(I) 1st/2nd generation squarks and gluino, (II) 3rd generation squarks,(III) non-colored sectors and (IV) (very) small DM (mass differencebetween NLSP and LSP)

Triggers:1) Tagging energetic jets (+ MET)

from cascade decays2) Tagging b’s, top’s, Higgs3) Tagging leptons, photons4) Tagging ISR jet5) Tagging VBF jets WW Collider6) Tagging with timing

1) Selected CMS searches for SUSY in colored sectors and non-colored sectors.

2) Summary & Remarks

𝑚 𝑔 or 𝑞

Compressed Mass (<50 GeV)Scenario?

𝑚 𝜒10

𝑚 𝑞 = ∞

𝑔 → ത𝑞 𝑞 → ത𝑞𝑞 𝜒10

8

SUSY Exploration Map

Teruki Kamon CMS SUSY

0

1 ( B, , , )d uW H H 1 ( , )dW H + +

1 ( , )uW H

Teruki Kamon 9

Multi-dimensional Search Regions

CMS SUSY

HT

mis

s

HT

SUS-16-033

𝐻𝑇miss > 300 GeV𝐻𝑇 > 300 GeV𝑁𝑗𝑒𝑡𝑠 ≥ 2

XX

𝑁𝑗, 𝑁𝑏, 𝑁ℓ, 𝑁𝜏

Teruki Kamon 10

Squarks/Gluinos

CMS SUSY

𝑚 𝑞 = ∞

𝑔 → ത𝑞 𝑞 → ത𝑞𝑞 𝜒10 𝑔 → ത𝑏෨𝑏 → ത𝑏𝑏 𝜒1

0

𝑚 ෨𝑏 = ∞𝑞 = 𝑢, ሚ𝑑, ǁ𝑠, ǁ𝑐

Teruki Kamon 11

Bottom Squarks

CMS SUSY

g

VBF: SUS-14-019

Monojet: SUS-14-001

[Q] Do we still care of the extremely compressed mass (< 10 GeV) scenario?

Monojet & 2bSUS-14-001 (8 TeV)

250 GeV

315 GeV

𝑚෨ 𝑏−𝑚

𝜒10

=5GeV∆𝒎 ≈ 𝟐𝟓 𝐆𝐞𝐕

CMS-PAS-BTV-15-002

Teruki Kamon 12CMS SUSY

Gluino with H(bb)

𝑚 𝑞 = ∞

𝑚 𝑔 −𝑚𝜒20 = 50

𝑔 → ത𝑞 𝑞 → ത𝑞𝑞 𝜒20

“Gluino with H(bb)” Results

Teruki Kamon 13CMS SUSY

CMS-SUS-17-006; CERN-EP-2017-322 𝜒20 → 𝐻 𝜒1

0 or Z 𝜒10 in heavy gluino ( 𝑔) decay …

high 𝑝𝑇 𝐻 → 𝑏𝑏 decay with small opening angle

Event with 𝑝𝑇𝑚𝑖𝑠𝑠 > 300 GeV; Use large cone

(AK8) jets to capture full Higgs decay (presence of two displaced subjets).

Jet mass shows clear peaking structure Search for 2H and 1H events (T5HH and

T5HZ models)

T5HZ

T5HH

𝒎𝑱

Teruki Kamon 14

Top Squarks

1 3 24 3

CMS SUSY

Stop decay Stop mixing & neutralino/chargino composition & 01

tm m m

D

1

1 2 3 4

Δ𝑚=𝑚

ሚ 𝑡−𝑚

𝜒10

g

“Tops”

Teruki Kamon 15CMS SUSY

CMS-SUS-16-050; CERN-EP-2017-257 Top (𝑡) quarks in top squarks ( ǁ𝑡) or gluinos ( 𝑔) decay … high 𝑝𝑇 𝑡 decay with small opening angle

Event with 𝑝𝑇miss > 250 GeV and 𝐻𝑇 >

300 GeV; Use AK8 jets to capture full top decay (3 subjets); two or three AK4 jets

Search for ≥ 1𝑡 and ≥ 1𝑏 events

Teruki Kamon 16

Top Sqaurk Results

CMS SUSY

2 3

CMS-PAS-SUS-16-052 CMS-SUS-16-050; CERN-EP-2017-257

4

“Gluino with Tops” Results

Teruki Kamon 17CMS SUSY

CMS-SUS-16-050; CERN-EP-2017-257

m( ǁ𝑡)-m( 𝜒10)=20 GeV 𝑚 ሚ𝑡 = ∞

Teruki Kamon 18LHC SUSY Searches (II)

Non-colored SUSY Probe Metric

kjiijkuiikjiijkkjiijkRPV DDUHLkDQLELLW

Lepton Number Violation

Baryon Number Violation

Charginos, Neutralinos, Sleptons

“non-pointing” g“delayed” g

Multiple Leptons + MET Photons + MET

Multiple Leptons + no “MET”Outside a box …

Selected topics, here

Teruki Kamon 19

Wino-Chargino and Bino-LSP Up to ~1150 and ~700 GeV for light slepton case; Up to 450 and 150 GeV for W and Z cases Weaker limits for Heavy slepton; being Higgsinos; small mass

difference (compressed mass spectra)CMS SUSY

x = 0.5 (maximum sensitivity)

Dimuon (3 GeV) + MET (50 GeV) trigger (offline: pT > 5 GeV and MET > 125 GeV) Soft OS dilepton in compressed mass spectra (DM < 20 GeV).

Limits on 𝝈(𝝌𝟏±𝝌𝟐

𝟎) with decays via (a) sleptons or (b) W/Z/H

Chargino-Neutralino

Chargino-Neutralino with Taus

Teruki Kamon 20CMS SUSY

CMS-PAS-SUS-17-002

𝜏ℎ + ℓ or 𝑒 + 𝜇 Event with 𝛥𝜙(𝜏𝜏), 𝛴𝑀𝑇,

and/or 𝑝𝑇miss

Search for OS 2𝜏

x = 0.95 (200, 197,5, 150) x = 0.05 (200, 152,5, 150) x = 0.50 (200, 175, 150)

Can we access to the compressed mass scenarios ( )?

(𝒎𝝌𝟐𝟎 ,𝒎𝝉,𝒎𝝌𝟏

𝟎)

LL Results (2016)

Teruki Kamon 21CMS SUSY

Summary of Run2 in 2016-17 Covering a large variety of possible final states even with <PU> ~25

Setting stringent limits on many SUSY scenarios including compressed mass SUSY. See the public result pages: http://cms-results.web.cern.ch/cms-results/public-results/publications/

Teruki Kamon 22CMS SUSY

Gluinos

Squ

ark

sElect

roweak

Gaug

inos

2000 GeV 1000 GeV

Hunting for SUSY

23Teruki Kamon CMS SUSY

How can we probe non-colored SUSY sector?1) Tagging energetic jets

(+ MET) from cascadedecays

2) Tagging leptons3) Tagging photons4) Tagging with ISR jet,

VBF jets5) Tagging with timing6) Any other means?

Heavy 1st/2nd generation squarks and gluino, not-so light 3rd

generation squaks, but light non-colored sector with (very)small ∆M (mass difference between NLSP and LSP)

2010-2017

2018-

We examined pp collisions for (i) Simplified Model Spectra (SMS) Scenarios; (ii) Minimal and non-minimal scenarios in Supersymmetric SM; (iii) Minimal and non-minimal scenarios in AMSB, GMSB, SUGRA/CMSSM; (iii) Natural SUSY, Split SUSY; (iv) RPV

© S. Kamon

Teruki Kamon 24CMS SUSY

Remarks on Run2 and Beyond

Good LHC duty cycle in 2018; Fills with 2 × 1034 cm−2s−1; CMS: ~10 fb−1;

Hadron Collider (s )

𝑔/ 𝑞 Mass Reach (M)

M/s

Tevatron (2 TeV) ~400 GeV 0.20

LHC (8 TeV) ~1.7 TeV 0.21

LHC (14 TeV) ~2.8 TeV* 0.20*

FCC (100 TeV) ~20 TeV* 0.20*

(*) just use a naïve scaling

Various improvements and optimizations: Dedicated heavy object tagging by

utilizing Deep Learning DeepAK8: tagger for boosted t/W DeepResolved: tagger for resolved top

with 3-jet combination Dedicated triggers for compressed-mass

spectra scenarios

Appendix

Teruki Kamon 25CMS SUSY

Challenges with High Luminosity (= PU)

Teruki Kamon 26CMS SUSY

CMS-PAS-JME-16-004

𝑬𝑻𝐦𝐢𝐬𝐬

𝒖⊥

𝒖∥

𝒖∥/𝒒𝑻

Data

/MC

𝝁 𝒆

𝝉 𝒋 → 𝝉

Tagging Boosted Objects

Teruki Kamon CMS SUSY 27

CMS-PAS-BTV-15-002 CMS-PAS-JME-10-013

Δ𝑅~2𝑚𝑝𝑎𝑟𝑡𝑖𝑐𝑙𝑒

𝑝𝑇

Tau Spelton Pair with Taus

Teruki Kamon 28CMS SUSY

CMS-PAS-SUS-17-003 Hadronically decayoing tau (𝜏ℎ) leptons in tau slepton ( ǁ𝜏) decay

Event with 𝑀𝑇2, Δ𝜙(𝜏𝜏), Σ𝑀𝑇, and/or 𝑝𝑇miss

Search for OS 2𝜏

Tau Slepton Pair with Taus

Teruki Kamon 29CMS SUSY

CMS-PAS-SUS-17-003

𝑚( 𝜒10)= 1 GeV

𝑚( ǁ𝜒10)= 1

GeV

𝑚( ǁ𝜒10)= 20

GeV

𝑚( ǁ𝜒10)= 50 GeV

ǁ𝜏𝐿

ǁ𝜏𝐿 ǁ𝜏𝑅ǁ𝜏𝑚𝑖𝑥𝑒𝑑

Tau Slepton Pair with Taus

Teruki Kamon 30CMS SUSY

CMS-PAS-SUS-17-002

𝑚( ǁ𝜒10)= 1

GeV

𝑚( ǁ𝜒10)= 20

GeV

𝑚( ǁ𝜒10)= 30 GeV𝑚( ǁ𝜒1

0)= 20 GeV

𝜏ℎ + ℓ or 𝑒 + 𝜇 from tau leptom decays Event with Δ𝜙(𝜏𝜏), Σ𝑀𝑇, and/or 𝑝𝑇

miss

Search for OS 2𝜏