Measurement of the Mass Difference between Top and Antitop Quarks - INSPIRE

DataBETA

Measurement of the Mass Difference between Top and Antitop Quarks

CMS

Collaboration

Apr, 2012

33 pages

Published in:

JHEP 06 (2012) 109

e-Print:

1204.2807 [hep-ex]

DOI:

10.1007/JHEP06(2012)109

PDG:

{\mathit m}_{{{\mathit t}}}

{\mathit m}_{{{\overline{\mathit t}}}}

Report number:

CMS-TOP-11-019,
CERN-PH-EP-2012-104

Experiments:

CERN-LHC-CMS

View in:

reference search48 citations

Citations per year

Abstract: (arXiv)

A measurement of the mass difference between the top and the antitop quark (Delta m(t) = m(t) - m(anti-t)) is performed using events with a muon or an electron and at least four jets in the final state. The analysis is based on data collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.96 +/- 0.11 inverse femtobarns, and yields the value of Delta m(t) = -0.44 +/- 0.46 (stat) +/- 0.27 (syst) GeV. This result is consistent with equality of particle and antiparticle masses required by CPT invariance, and provides a significantly improved precision relative to existing measurements.

top: mass
invariance: CPT
CMS
p p: interaction
top: pair production
mass difference: (top anti-top): measured
final state: ((n)jet lepton)
lepton: charge
anti-top: mass
data analysis method

References(37)

Figures(12)

[1]

Review of particle physics

K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
H. Murayama
(
- LBL, Berkeley and
- UC, Berkeley and
- Tokyo U., IPMU
)
,
M. Tanabashi
(
- Nagoya U.
)

et al.

- J.Phys.G 37 (2010) 075021
•
DOI:
- 10.1088/0954-3899/37/7A/075021

[2]

Direct measurement of the mass difference between top and antitop quarks

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 103 (2009) 132001
•
e-Print:
- 0906.1172
•
DOI:
- 10.1103/PhysRevLett.103.132001

[3]

Measurement of the Mass Difference between $t$ and $\bar{t}$ Quarks

CDF

Collaboration

•

T. Aaltonen
(
- Helsinki Inst. of Phys.
)

et al.

- Phys.Rev.Lett. 106 (2011) 152001
•
e-Print:
- 1103.2782
•
DOI:
- 10.1103/PhysRevLett.106.152001

[4]

Direct measurement of the mass difference between top and antitop quarks

D0

Collaboration

•

Victor Mukhamedovich Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.D 84 (2011) 052005
•
e-Print:
- 1106.2063
•
DOI:
- 10.1103/PhysRevD.84.052005

[5]

LHC Machine

Lyndon Evans
(
- CERN
)
(ed.)
,
Philip Bryant
(
- CERN
)
(ed.)

- JINST 3 (2008) S08001
•
DOI:
- 10.1088/1748-0221/3/08/S08001

[6]

Measurement of the Mass and Width of the $W$ Boson in $e^{+} e^{-}$ Collisions at $\sqrt{s}$ = 161-GeV - 209-GeV

DELPHI

Collaboration

•

J. Abdallah
(
- Paris U., VI-VII
)

et al.

- Eur.Phys.J.C 55 (2008) 1-38
•
e-Print:
- 0803.2534
•
DOI:
- 10.1140/epjc/s10052-008-0585-7

[7]

Measurement of the Top Quark Mass in the Lepton + Jets Channel using the Ideogram Method

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.D 75 (2007) 092001
•
e-Print:
- hep-ex/0702018
•
DOI:
- 10.1103/PhysRevD.75.092001

[8]

Measurement of the top-quark mass in all-hadronic decays in p anti-p collisions at CDF II

CDF

Collaboration

•

T. Aaltonen
(
- Helsinki Inst. of Phys.
)

et al.

- Phys.Rev.Lett. 98 (2007) 142001
•
e-Print:
- hep-ex/0612026
•
DOI:
- 10.1103/PhysRevLett.98.142001

[9]

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

[10]

MadGraph 5 : Going Beyond

Johan Alwall
(
- Fermilab
)
,
Michel Herquet
(
- NIKHEF, Amsterdam
)
,
Fabio Maltoni
(
- Louvain U., CP3
)
,
Olivier Mattelaer
(
- Louvain U., CP3
)
,
Tim Stelzer
(
- Illinois U., Urbana
)

- JHEP 06 (2011) 128
•
e-Print:
- 1106.0522
•
DOI:
- 10.1007/JHEP06(2011)128

[11]

PYTHIA 6.4 Physics and Manual

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)
,
Stephen Mrenna
(
- Fermilab
)
,
Peter Z. Skands
(
- Fermilab
)

- JHEP 05 (2006) 026
•
e-Print:
- hep-ph/0603175
•
DOI:
- 10.1088/1126-6708/2006/05/026

[12]

Matching matrix elements and shower evolution for top-quark production in hadronic collisions

Michelangelo L. Mangano
(
- CERN
)
,
Mauro Moretti
(
- Ferrara U. and
- INFN, Ferrara
)
,
Fulvio Piccinini
(
- INFN, Pavia
)
,
Michele Treccani
(
- Ferrara U. and
- INFN, Ferrara
)

- JHEP 01 (2007) 013
•
e-Print:
- hep-ph/0611129
•
DOI:
- 10.1088/1126-6708/2007/01/013

[13]

Matching NLO QCD computations with Parton Shower simulations: the POWHEG method

Stefano Frixione
(
- INFN, Genoa
)
,
Paolo Nason
(
- INFN, Milan Bicocca
)
,
Carlo Oleari
(
- INFN, Milan Bicocca and
- Milan Bicocca U.
)

- JHEP 11 (2007) 070
•
e-Print:
- 0709.2092
•
DOI:
- 10.1088/1126-6708/2007/11/070

[14]

Electroweak gauge boson production at hadron colliders through $O(\alpha_s^2)$

Kirill Melnikov
(
- Hawaii U.
)
,
Frank Petriello
(
- Wisconsin U., Madison
)

- Phys.Rev.D 74 (2006) 114017
•
e-Print:
- hep-ph/0609070
•
DOI:
- 10.1103/PhysRevD.74.114017

[15]

MCFM for the Tevatron and the LHC

John M. Campbell
(
- Fermilab
)
,
R.K. Ellis
(
- Fermilab
)

- Nucl.Phys.B Proc.Suppl. 205-206 (2010) 10-15
•
e-Print:
- 1007.3492
•
DOI:
- 10.1016/j.nuclphysbps.2010.08.011

[16]

Geant4 developments and applications

et al.

- IEEE Trans.Nucl.Sci. 53 (2006) 270
•
DOI:
- 10.1109/TNS.2006.869826

[17]

Commissioning of the Particle-Flow reconstruction in Minimum-Bias and Jet Events from pp Collisions at 7 TeV

CMS

Collaboration

[18]

Performance of muon identification in pp collisions at s**0.5 = 7 TeV

CMS

Collaboration

[19]

Electron reconstruction and identification at sqrt(s) = 7 TeV

CMS

Collaboration

[20]

The anti- $k_t$ jet clustering algorithm

- JHEP 04 (2008) 063
•
e-Print:
- 0802.1189
•
DOI:
- 10.1088/1126-6708/2008/04/063

[21]

Determination of Jet Energy Calibration and Transverse Momentum Resolution in CMS

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 6 (2011) P11002
•
e-Print:
- 1107.4277
•
DOI:
- 10.1088/1748-0221/6/11/P11002

[22]

Measurement of the Top-antitop Production Cross Section in $pp$ Collisions at $\sqrt{s}=7$ TeV using the Kinematic Properties of Events with Leptons and Jets

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Eur.Phys.J.C 71 (2011) 1721
•
e-Print:
- 1106.0902
•
DOI:
- 10.1140/epjc/s10052-011-1721-3

[23]

Measurement of the $t \bar{t}$ Production Cross Section in $pp$ Collisions at 7 TeV in Lepton + Jets Events Using $b$ -quark Jet Identification

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Rev.D 84 (2011) 092004
•
e-Print:
- 1108.3773
•
DOI:
- 10.1103/PhysRevD.84.092004

[24]

Calibration of the jet energy scale using top quark events at the LHC

P. Van Mulders

[25]

Fitting of event topologies with external kinematic constraints in CMS

et al.

1-25 of 37
1
2
25 / page