A Search for Resonant $t\bar{t}$bar Production in All Final States in pp Collisions at $\sqrt{s}$ = 8 TeV

A Search for Resonant $t\bar{t}$ bar Production in All Final States in pp Collisions at $\sqrt{s}$ = 8 TeV

CMS

Collaboration

May 11, 2015

17 pages

Report number:

CMS-PAS-B2G-13-008

Experiments:

CERN-LHC-CMS

View in:

CERN Document Server

pdf

reference search4 citations

Citations per year

Abstract:

A search is presented for the production of heavy resonances decaying into top-antitop quark pairs in events with three different final states, defined by the number of leptons from the

\rm{t}\bar{\rm{t}} \to \rm{W}\rm{b}\rm{W}\rm{b}

decay. The data correspond to an integrated luminosity of

19.7

~fb

^{-1}

and was collected by the CMS detector in proton-proton collisions at

\sqrt{s}=8

~TeV. The selections are optimized for reconstruction of top quarks with high Lorentz boosts, where jet substructure techniques are used to enhance the sensitivity. No significant excess of events over the expected yield from standard model processes is observed. Upper limits on the production cross section of heavy resonances decaying to

\rm{t}\bar{\rm{t}}

are calculated using all channels. A narrow leptophobic topcolor

\rm{Z}^\prime

resonance with a mass below

2.4

~TeV is excluded at a 95\% confidence level. Limits are also derived for a broad

\rm{Z}^\prime

resonance with 10\% width and a Kaluza-Klein excitation of the gluon in the Randall-Sundrum model.

Note:

Preliminary results

Data
resonance: heavy
new particle: search for
p p: scattering
p p: colliding beams
gluon: Kaluza-Klein
gluon: excited state
quark: pair
top: pair production
Randall-Sundrum model

References(70)

Figures(8)

[1]

Observation of a New Boson at a Mass of 125 GeV with the CMS Experiment at the LHC

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Lett.B 716 (2012) 30-61
•
e-Print:
- 1207.7235
•
DOI:
- 10.1016/j.physletb.2012.08.021

[2]

Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- Phys.Lett.B 716 (2012) 1-29
•
e-Print:
- 1207.7214
•
DOI:
- 10.1016/j.physletb.2012.08.020

[3]

Observation of a New Boson with Mass Near 125 GeV in $pp$ Collisions at $\sqrt{s}$ = 7 and 8 TeV

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 06 (2013) 081
•
e-Print:
- 1303.4571
•
DOI:
- 10.1007/JHEP06(2013)081

[4]

Topcolor: Top quark condensation in a gauge extension of the standard model

Christopher T. Hill
(
- Fermilab
)

- Phys.Lett.B 266 (1991) 419-424
•
DOI:
- 10.1016/0370-2693(91)91061-Y

[5]

Top production: Sensitivity to new physics

Christopher T. Hill
(
- Fermilab
)
,
Stephen J. Parke
(
- Fermilab
)

- Phys.Rev.D 49 (1994) 4454-4462
•
e-Print:
- hep-ph/9312324
•
DOI:
- 10.1103/PhysRevD.49.4454

[6]

Topcolor assisted technicolor

Christopher T. Hill
(
- Fermilab
)

- Phys.Lett.B 345 (1995) 483-489
•
e-Print:
- hep-ph/9411426
•
DOI:
- 10.1016/0370-2693(94)01660-5

[6]

Cross-Section for Topcolor $Z^{\prime}_t$ Decaying to $t\bar{t}$

e-Print:
- hep-ph/9911288

[7]

Cross Sections for Leptophobic Topcolor Z' Decaying to Top-Antitop

Robert M. Harris
(
- Fermilab
)
,
Supriya Jain
(
- SUNY, Buffalo
)

- Eur.Phys.J.C 72 (2012) 2072
•
e-Print:
- 1112.4928
•
DOI:
- 10.1140/epjc/s10052-012-2072-4

[8]

Prominent decay modes of a leptophobic $Z^\prime$

Jonathan L. Rosner
(
- CERN and
- Chicago U., EFI and
- Chicago U.
)

- Phys.Lett.B 387 (1996) 113-117
•
e-Print:
- hep-ph/9607207
•
DOI:
- 10.1016/0370-2693(96)01022-2

[9]

Finding $Z^\prime$ bosons coupled preferentially to the third family at LEP and the Tevatron

- Phys.Rev.D 63 (2001) 035006
•
e-Print:
- hep-ph/0007286
•
DOI:
- 10.1103/PhysRevD.63.035006

[10]

$Z^\prime$ gauge bosons at the Tevatron

Marcela Carena
(
- Fermilab
)
,
Alejandro Daleo
(
- Fermilab and
- La Plata U.
)
,
Bogdan A. Dobrescu
(
- Fermilab
)
,
Timothy M.P. Tait
(
- Fermilab
)

- Phys.Rev.D 70 (2004) 093009
•
e-Print:
- hep-ph/0408098
•
DOI:
- 10.1103/PhysRevD.70.093009

[11]

Chiral Color: An Alternative to the Standard Model

Paul H. Frampton
(
- Harvard U. and
- Boston U.
)
,
Sheldon L. Glashow
(
- Harvard U. and
- Boston U.
)

- Phys.Lett.B 190 (1987) 157-161
•
DOI:
- 10.1016/0370-2693(87)90859-8

[12]

Top production at the Tevatron/LHC and nonstandard, strongly interacting spin one particles

Debajyoti Choudhury
(
- Delhi U.
)
,
Rohini M. Godbole
(
- Bangalore, Indian Inst. Sci. and
- Tata Inst.
)
,
Ritesh K. Singh
(
- Annecy, LAPTH
)
,
Kshitij Wagh
(
- Rutgers U., Piscataway
)

- Phys.Lett.B 657 (2007) 69-76
•
e-Print:
- 0705.1499
•
DOI:
- 10.1016/j.physletb.2007.09.057

[12]

Nonstandard, strongly interacting spin one $t \bar{t}$ resonances

e-Print:
- 0810.3635

[13]

Higgs decay to top quarks at hadron colliders

D. Dicus
(
- Texas U.
)
,
A. Stange
(
- Brookhaven
)
,
S. Willenbrock
(
- Illinois U., Urbana
)

- Phys.Lett.B 333 (1994) 126-131
•
e-Print:
- hep-ph/9404359
•
DOI:
- 10.1016/0370-2693(94)91017-0

[14]

A Large mass hierarchy from a small extra dimension

Lisa Randall
(
- Princeton U. and
- MIT
)
,
Raman Sundrum
(
- Boston U.
)

- Phys.Rev.Lett. 83 (1999) 3370-3373
•
e-Print:
- hep-ph/9905221
•
DOI:
- 10.1103/PhysRevLett.83.3370

[15]

LHC Signals from Warped Extra Dimensions

Kaustubh Agashe
(
- Syracuse U.
)
,
Alexander Belyaev
(
- Michigan State U.
)
,
Tadas Krupovnickas
(
- Brookhaven
)
,
Gilad Perez
(
- YITP, Stony Brook
)
,
Joseph Virzi
(
- LBL, Berkeley
)

- Phys.Rev.D 77 (2008) 015003
•
e-Print:
- hep-ph/0612015
•
DOI:
- 10.1103/PhysRevD.77.015003

[16]

Phenomenology of the Randall-Sundrum Gauge Hierarchy Model

- Phys.Rev.Lett. 84 (2000) 2080
•
e-Print:
- hep-ph/9909255
•
DOI:
- 10.1103/PhysRevLett.84.2080

[17]

Search for Anomalous $t\bar{t}$ Production in the Highly-Boosted All-Hadronic Final State

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 09 (2012) 029,
- JHEP 03 (2014) 132 (erratum)
•
e-Print:
- 1204.2488
•
DOI:
- 10.1007/JHEP09(2012)029

[18]

A search for $t\bar{t}$ resonances in lepton+jets events with highly boosted top quarks collected in $pp$ collisions at $\sqrt{s} = 7$ TeV with the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- JHEP 09 (2012) 041
•
e-Print:
- 1207.2409
•
DOI:
- 10.1007/JHEP09(2012)041

[19]

Search for $t\bar t$ resonances in the lepton plus jets final state with ATLAS using 4.7 fb $^{-1}$ of $pp$ collisions at $\sqrt{s} = 7$ TeV

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- Phys.Rev.D 88 (2013) 1, 012004
•
e-Print:
- 1305.2756
•
DOI:
- 10.1103/PhysRevD.88.012004

[20]

Search for Resonant $t\bar{t}$ Production in Lepton+Jets Events in $pp$ Collisions at $\sqrt{s}=7$ TeV

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 12 (2012) 015
•
e-Print:
- 1209.4397
•
DOI:
- 10.1007/JHEP12(2012)015

[21]

Search for $Z$ ' Resonances Decaying to $t\bar{t}$ in Dilepton + Jets Final States in $pp$ Collisions at $\sqrt{s}=7$ TeV

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Rev.D 87 (2013) 7, 072002
•
e-Print:
- 1211.3338
•
DOI:
- 10.1103/PhysRevD.87.072002

[22]

Searches for New Physics using the $t\bar{t}$ Invariant Mass Distribution in pp Collisions at $\sqrt{s}$ =8 TeV

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Rev.Lett. 111 (2013) 21, 211804,
- Phys.Rev.Lett. 112 (2014) 11, 119903 (erratum)
•
e-Print:
- 1309.2030
•
DOI:
- 10.1103/PhysRevLett.111.211804

[23]

The CMS Experiment at the CERN LHC

CMS

Collaboration

•

S. Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 3 (2008) S08004
•
DOI:
- 10.1088/1748-0221/3/08/S08004

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A Search for Resonant ttˉt\bar{t}ttˉbar Production in All Final States in pp Collisions at s\sqrt{s}s​ = 8 TeV

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A Search for Resonant $t\bar{t}$ bar Production in All Final States in pp Collisions at $\sqrt{s}$ = 8 TeV