Searches for Physics Beyond the Searches for Physics Beyond the Standard Model (Exotica) in pp collisions Standard Model (Exotica) in pp collisions

at 7 TeV at the CMS Experimentat 7 TeV at the CMS ExperimentSergei Shmatov

Joint Institute for Nuclear Research, Dubna on behalf of CMS Collaboration

The NPD RAS Conference "The Physics of Fundamental Interactions”

21-25 Nov 2011, ITEP, Moscow

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 2

Exotica at LHC is Physics beyond SM/SUSY/Higgs

Heavy Resonances (extended gauge models, extra dimensions,

technicolor) dileptons, dijets, diphotons, ttbar, WZ

Non-Resonant Signals Mono-particle + Missing ET (extended gauge models, extra

dimensions, technicolor) mono-jet + MET, mono-photon + MET, mono-lepton + MET

Black Holes (extra dimensions) high-multiplicity events

Leptoquarks

4th Generation lepton + jet, dilepton

CMS Exotica Public Physics Results https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsEXO

OUTLINE

Total weight 12 500 tOverall diameter 15.00 mOverall length 21.6 mMagnetic field 3.8 Tesla

Total weight 12 500 tOverall diameter 15.00 mOverall length 21.6 mMagnetic field 3.8 Tesla

Large general-purpose particle physics detector

Compact Muon SolenoidCompact Muon Solenoid

Detector subsystems are designed to measure:the energy and momentum of photons, electrons, muons, jets, missing ET up to a few TeV

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 3

LHC provided 5.7 fb-1 at a 7 TeVcenter-of-mass energy for this year

5.2 fb-1 was recorded by CMS

The results covered by this talk were

produced with ~ 1fb-1

LHC provided 5.7 fb-1 at a 7 TeVcenter-of-mass energy for this year

5.2 fb-1 was recorded by CMS

The results covered by this talk were

produced with ~ 1fb-1

Heavy Resonances Extra gauge bosons predicted by extended gauge models (left-right symmetric models and GUT-inspired models) Kaluza-Klein graviton excitations arising in extra dimensions models with curved bulk space (Randall-Sundrum model) Small extra spatial dimensions, Curved

bulk space (AdS5 - slice)

Well separated graviton mass spectrum

Kaluza-Klein excitations of SM gauge

bosons in large flat extra-dimensions (TeV-1 Models) Bosons could also propagate in the bulk Fermions are localized at the same (opposite) orbifold point: destructive

(constructive) interference between SM gauge bosons and KK excitations

TechnicolorSignals: di-leptons/di-jets/di-photons resonance states in high (~TeV) invariant mass range new particles would be observed as a bump, excess in the mass spectrum

Excellent momentum and energy resolutions are required !! Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 4

Dileptons: Spectra

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 5

CMS PAS EXO-11-019

New Physics (Z/ZKK/GKK) contributions to SM processes:

llqq llgg

Part. of Russian Inst.: JINR

Dileptons: Limits

A Z’ with standard-model-like couplings can be excluded below 1940 GeV, the superstring-inspired Z’ below 1620 GeV, and RS Kaluza–Klein gravitons below

1450 (1780) GeV for couplings of 0.05 (0.10)

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 6

CMS PAS EXO-11-019

Part. of Russian Inst.: JINR

Highest Dilepton Mass at CMS

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 7

CMS PAS EXO-11-019

Dielectron, M = 971 GeV Dimuon, M = 1203 GeV

Part. of Russian Inst.: JINR

Diphotons

RS Kaluza–Klein gravitons below 1.7 TeV for couplings of 0.10

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 8

CMS PAS EXO-11-038

Dijets

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 9

CMS PAS EXO-11-015arXiv:1107.4771Phys. Lett. B, 3 (704) 2011, 123

Highest Dijets Mass at CMS

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 10

CMS PAS EXO-11-015

ttbar

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 11

CMS PAS EXO-11-006

CMS PAS EXO-11-055Sub-picobarn limits on (Z ttbar

in the all-hadronic channel) for Z heavier than 1.1 TeV

CMS excludes KK gluon with mass of 1.0-1.5 TeV

Sub-picobarn limits on (Z ttbar (W+b) (W-bbar)) for Z heavier than 1.35 TeV

CMS excludes topcolor Z in mass regions 850-935 GeV andf 960-1060 GeV

WZ Resonances

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 12

CMS PAS EXO-11-041

(Lepton-Lepton) + (Jet-Jet) Resonance

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 13

WR and heavy neutrino from LR models

CMS PAS EXO-11-002

for details see talk by N.V. Krasnikov

Part. of Russian Inst.: INR

Non-Resonant Signals ADD-graviton contribution in the SM processes (Drell-Yan,

diphotons productions)

Compositeness

Signals: excess in di-particle spectrum

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 14

llqq llgg

d=2d=2

d=4d=4

SMSM

Exclusion Limits for ADD

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 15

Dimuons Diphotons

CMS PAS EXO-11-038

CMS PAS EXO-11-039

Mono-Particle + MET Extra gauge bosons (W) predicted by extended gauge

models (left-right symmetric models and GUT-inspired

models)

Kaluza-Klein graviton emission in large

flat extra-dimensions (ADD model)

Technicolor

Signals: lepton + MET, photon +MET, jet +MET

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 16

Lepton + MET

Signature is W-like at high masBackground is SM W production!

W’ with SM-like coupling is exluded with MW’ = 2.27 TeV

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 17

CMS PAS EXO-11-024

Photon + MET

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 18

CMS PAS EXO-11-058

CMS extends the current limits to be MD > 1.25-1.31 TeV for n = 2 - 6

Jet + MET

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 19

CMS PAS EXO-11-059

Black Holes

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 20

for details see talk by M.V. Savina

Black HolesThe CMS analysis - 2010, 35 pb-1:

arXiv:1012.3375v1, Phys. Lett. B V697 (2011), p. 434The CMS analysis - 2011, 1.09 fb-1:recent CMS analysis - EXO-11-071

CMS set limits on theminimum BH mass of 4.4-5.1 TeV

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 21

Part. of Russian Inst.: JINR

Leptoquarks

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 22

An LQ carries color, has fractional electric charge, can have spin 0 or spin 1, and couples to a lepton and a quark with coupling strength β!

An LQ would decay to a charged lepton and a quark, with an unknownbranching fraction λ, or a neutrino and a quark, with branching fraction 1- β

Leptoquarks

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 23

CERN-PH-EP-2010-052

ST is the sum of the magnitudes of the pT

of the two leading electrons and two leading jets.

A 95% C.L. lower limit is set on the mass of a first-generation scalar leptoquark at 384 GeV

4th Generation

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 24

Recently renewed interest, since it has been shown that the EWKbounds are less constraining for a non-degenerate fourthgeneration!

With a fourth generation, indirect bounds on the Higgs boson masscan be relaxed, and an additional generation of quarks maypossess enough intrinsic matter and anti-matter asymmetry to berelevant for the baryon asymmetry of the Universe!

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 25

bt + W

CMS PAS EXO-11-036

Mb > 495 GeV

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 26

Searching of t(1)

Mt > 417 GeV

CMS PAS EXO-11-005

CMS PAS EXO-11-050

Mt > 422 GeV

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 27

Searching of t(2)CMS PAS EXO-11-

051

Mt > 450 GeV

CMS Exotica Summary

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 28

Conclusions and Outlook

CMS demonstrates excellent performance TeV leptons, photons, jets Mono-particle + associated missing energy Complex signatures

Physics analysis with ~ 1 fb-1 set stringent limits to many benchmarks models (more than 20 papers and public Physics Analysis Notes)

Unfortunately, no evident deviations from Standard Model have been seen so far

~ 5 fb-1 are in analysis

Sergei Shmatov, Searches for Physics Beyond the Standard Model at the CMS Experiment, NPD RAS Conference 2011, Moscow 29