Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at (Formula presented.)

The ATLAS Collaboration

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The mass of the top quark is measured in a data set corresponding to 4.6 (Formula presented.) of proton–proton collisions with centre-of-mass energy (Formula presented.) TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays of top–antitop quark pairs with at least six jets in the final state are selected. The substantial background from multijet production is modelled with data-driven methods that utilise the number of identified $$b$$b-quark jets and the transverse momentum of the sixth leading jet, which have minimal correlation. The top-quark mass is obtained from template fits to the ratio of three-jet to dijet mass. The three-jet mass is calculated from the three jets produced in a top-quark decay. Using these three jets the dijet mass is obtained from the two jets produced in the W boson decay. The top-quark mass obtained from this fit is thus less sensitive to the uncertainty in the energy measurement of the jets. A binned likelihood fit yields a top-quark mass of (Formula presented.).

    Original languageEnglish
    Pages (from-to)1-26
    Number of pages26
    JournalEuropean Physical Journal C
    Volume75
    Issue number4
    DOIs
    Publication statusPublished - 2015 Apr 1

    Fingerprint

    quarks
    decay
    Electric power measurement
    Bosons
    transverse momentum
    center of mass
    Momentum
    templates
    bosons
    Detectors
    collisions
    energy
    detectors

    Keywords

    • ATLAS
    • Fully hadronic
    • LHC
    • Proton–proton collisions
    • Top quark
    • Top-quark mass

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)
    • Engineering (miscellaneous)

    Cite this

    Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at (Formula presented.). / The ATLAS Collaboration.

    In: European Physical Journal C, Vol. 75, No. 4, 01.04.2015, p. 1-26.

    Research output: Contribution to journalArticle

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    title = "Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at (Formula presented.)",
    abstract = "The mass of the top quark is measured in a data set corresponding to 4.6 (Formula presented.) of proton–proton collisions with centre-of-mass energy (Formula presented.) TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays of top–antitop quark pairs with at least six jets in the final state are selected. The substantial background from multijet production is modelled with data-driven methods that utilise the number of identified $$b$$b-quark jets and the transverse momentum of the sixth leading jet, which have minimal correlation. The top-quark mass is obtained from template fits to the ratio of three-jet to dijet mass. The three-jet mass is calculated from the three jets produced in a top-quark decay. Using these three jets the dijet mass is obtained from the two jets produced in the W boson decay. The top-quark mass obtained from this fit is thus less sensitive to the uncertainty in the energy measurement of the jets. A binned likelihood fit yields a top-quark mass of (Formula presented.).",
    keywords = "ATLAS, Fully hadronic, LHC, Proton–proton collisions, Top quark, Top-quark mass",
    author = "{The ATLAS Collaboration} and G. Aad 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 R. Abreu and Y. Abulaiti and Acharya, {B. S.} and L. Adamczyk and Adams, {D. L.} and J. Adelman and S. Adomeit and T. Adye and T. Agatonovic-Jovin and Aguilar-Saavedra, {J. A.} and M. Agustoni and Ahlen, {S. P.} and F. Ahmadov and G. Aielli and H. Akerstedt and {\AA}kesson, {T. P A} and G. Akimoto and Akimov, {A. V.} and Alberghi, {G. L.} and J. Albert and S. Albrand and {Alconada Verzini}, {M. J.} and M. Aleksa and Aleksandrov, {I. N.} and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and G. Alimonti and L. Alio and J. Alison and Allbrooke, {B. M M} and Allison, {L. J.} and Allport, {P. P.} and J. Almond and A. Aloisio and T. Iizawa and Kohei Yorita",
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    TY - JOUR

    T1 - Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at (Formula presented.)

    AU - The ATLAS Collaboration

    AU - Aad, G.

    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 - Abreu, R.

    AU - Abulaiti, Y.

    AU - Acharya, B. S.

    AU - Adamczyk, L.

    AU - Adams, D. L.

    AU - Adelman, J.

    AU - Adomeit, S.

    AU - Adye, T.

    AU - Agatonovic-Jovin, T.

    AU - Aguilar-Saavedra, J. A.

    AU - Agustoni, M.

    AU - Ahlen, S. P.

    AU - Ahmadov, F.

    AU - Aielli, G.

    AU - Akerstedt, H.

    AU - Åkesson, T. P A

    AU - Akimoto, G.

    AU - Akimov, A. V.

    AU - Alberghi, G. L.

    AU - Albert, J.

    AU - Albrand, S.

    AU - Alconada Verzini, M. J.

    AU - Aleksa, M.

    AU - Aleksandrov, I. N.

    AU - Alexa, C.

    AU - Alexander, G.

    AU - Alexandre, G.

    AU - Alexopoulos, T.

    AU - Alhroob, M.

    AU - Alimonti, G.

    AU - Alio, L.

    AU - Alison, J.

    AU - Allbrooke, B. M M

    AU - Allison, L. J.

    AU - Allport, P. P.

    AU - Almond, J.

    AU - Aloisio, A.

    AU - Iizawa, T.

    AU - Yorita, Kohei

    PY - 2015/4/1

    Y1 - 2015/4/1

    N2 - The mass of the top quark is measured in a data set corresponding to 4.6 (Formula presented.) of proton–proton collisions with centre-of-mass energy (Formula presented.) TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays of top–antitop quark pairs with at least six jets in the final state are selected. The substantial background from multijet production is modelled with data-driven methods that utilise the number of identified $$b$$b-quark jets and the transverse momentum of the sixth leading jet, which have minimal correlation. The top-quark mass is obtained from template fits to the ratio of three-jet to dijet mass. The three-jet mass is calculated from the three jets produced in a top-quark decay. Using these three jets the dijet mass is obtained from the two jets produced in the W boson decay. The top-quark mass obtained from this fit is thus less sensitive to the uncertainty in the energy measurement of the jets. A binned likelihood fit yields a top-quark mass of (Formula presented.).

    AB - The mass of the top quark is measured in a data set corresponding to 4.6 (Formula presented.) of proton–proton collisions with centre-of-mass energy (Formula presented.) TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays of top–antitop quark pairs with at least six jets in the final state are selected. The substantial background from multijet production is modelled with data-driven methods that utilise the number of identified $$b$$b-quark jets and the transverse momentum of the sixth leading jet, which have minimal correlation. The top-quark mass is obtained from template fits to the ratio of three-jet to dijet mass. The three-jet mass is calculated from the three jets produced in a top-quark decay. Using these three jets the dijet mass is obtained from the two jets produced in the W boson decay. The top-quark mass obtained from this fit is thus less sensitive to the uncertainty in the energy measurement of the jets. A binned likelihood fit yields a top-quark mass of (Formula presented.).

    KW - ATLAS

    KW - Fully hadronic

    KW - LHC

    KW - Proton–proton collisions

    KW - Top quark

    KW - Top-quark mass

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    U2 - 10.1140/epjc/s10052-015-3373-1

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    VL - 75

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    JO - European Physical Journal C

    JF - European Physical Journal C

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