Measurement of the mass difference between top and anti-top quarks in pp collisions at √s=7 TeV using the ATLAS detector

ATLAS Collaboration

doi:10.1016/j.physletb.2013.12.010

Measurement of the mass difference between top and anti-top quarks in pp collisions at √s=7 TeV using the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb⁻¹ data sample of proton–proton collisions at s=7 TeV recorded with the ATLAS detector at the LHC, events consistent with tt¯ production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields Δm≡m_t−m_t¯=0.67±0.61(stat)±0.41(syst) GeV, consistent with CPT invariance.

Original language	English
Pages (from-to)	363-379
Number of pages	17
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	728
DOIs	https://doi.org/10.1016/j.physletb.2013.12.010
State	Published - 20 Jan 2014
Externally published	Yes

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10.1016/j.physletb.2013.12.010

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@article{b9add67c311f449a9e191f0472cd5fd0,

title = "Measurement of the mass difference between top and anti-top quarks in pp collisions at √s=7 TeV using the ATLAS detector",

abstract = "A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb−1 data sample of proton–proton collisions at s=7 TeV recorded with the ATLAS detector at the LHC, events consistent with tt¯ production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields Δm≡mt−mt¯=0.67±0.61(stat)±0.41(syst) GeV, consistent with CPT invariance.",

author = "\{ATLAS Collaboration\} and G. Aad and T. Abajyan and B. Abbott and J. Abdallah and \{Abdel Khalek\}, S. and O. Abdinov and R. Aben and B. Abi and M. Abolins and AbouZeid, \{O. S.\} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and S. Adomeit and T. Adye and S. Aefsky and T. Agatonovic-Jovin and Aguilar-Saavedra, \{J. A.\} and M. Agustoni and Ahlen, \{S. P.\} and A. Ahmad and F. Ahmadov and M. Ahsan and G. Aielli and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and Alam, \{M. A.\} and J. Albert and S. Albrand and \{Alconada Verzini\}, \{M. J.\} and M. Aleksa and Aleksandrov, \{I. N.\} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and M. Aliev and G. Alimonti and L. Alio and J. Alison and Allbrooke, \{B. M.M.\} and L. Yuan",

note = "Publisher Copyright: {\textcopyright} 2013 The Authors",

year = "2014",

month = jan,

day = "20",

doi = "10.1016/j.physletb.2013.12.010",

language = "英语",

volume = "728",

pages = "363--379",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Measurement of the mass difference between top and anti-top quarks in pp collisions at √s=7 TeV using the ATLAS detector

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abajyan, T.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.

AU - Abdinov, O.

AU - Aben, R.

AU - Abi, B.

AU - Abolins, M.

AU - AbouZeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adye, T.

AU - Aefsky, S.

AU - Agatonovic-Jovin, T.

AU - Aguilar-Saavedra, J. A.

AU - Agustoni, M.

AU - Ahlen, S. P.

AU - Ahmad, A.

AU - Ahmadov, F.

AU - Ahsan, M.

AU - Aielli, G.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Alconada Verzini, M. J.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Aliev, M.

AU - Alimonti, G.

AU - Alio, L.

AU - Alison, J.

AU - Allbrooke, B. M.M.

AU - Yuan, L.

PY - 2014/1/20

Y1 - 2014/1/20

N2 - A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb−1 data sample of proton–proton collisions at s=7 TeV recorded with the ATLAS detector at the LHC, events consistent with tt¯ production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields Δm≡mt−mt¯=0.67±0.61(stat)±0.41(syst) GeV, consistent with CPT invariance.

AB - A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb−1 data sample of proton–proton collisions at s=7 TeV recorded with the ATLAS detector at the LHC, events consistent with tt¯ production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields Δm≡mt−mt¯=0.67±0.61(stat)±0.41(syst) GeV, consistent with CPT invariance.

UR - https://www.scopus.com/pages/publications/85042515656

U2 - 10.1016/j.physletb.2013.12.010

DO - 10.1016/j.physletb.2013.12.010

M3 - 文章

AN - SCOPUS:85042515656

SN - 0370-2693

VL - 728

SP - 363

EP - 379

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Measurement of the mass difference between top and anti-top quarks in pp collisions at √s=7 TeV using the ATLAS detector

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