Search for flavor-changing neutral-current couplings between the top quark and the Z boson with proton-proton collisions at √s=13  TeV with the ATLAS detector

Atlas Collaboration

doi:10.1103/PhysRevD.108.032019

Search for flavor-changing neutral-current couplings between the top quark and the Z boson with proton-proton collisions at √s=13 TeV with the ATLAS detector

Atlas Collaboration

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

Abstract

A search for flavor-changing neutral-current couplings between a top quark, an up or charm quark, and a Formula Presented boson is presented, using proton-proton collision data at Formula Presented collected by the ATLAS detector at the Large Hadron Collider. The analyzed data set corresponds to an integrated luminosity of Formula Presented. The search targets both single-top-quark events produced as Formula Presented (with Formula Presented, Formula Presented) and top-quark-pair events, with one top quark decaying through the Formula Presented channel. The analysis considers events with three leptons (electrons or muons), a Formula Presented-tagged jet, possible additional jets, and missing transverse momentum. The data are found to be consistent with the background-only hypothesis and 95% confidence-level limits on the Formula Presented branching ratios, assuming only tensor operators of the Standard Model effective field theory framework contribute to the Formula Presented vertices. These are Formula Presented (Formula Presented) for Formula Presented (Formula Presented) for a left-handed Formula Presented coupling, and Formula Presented (Formula Presented) in the case of a right-handed coupling. These results are interpreted as 95% CL upper limits on the strength of the corresponding couplings, yielding limits for Formula Presented and Formula Presented (Formula Presented and Formula Presented) of 0.15 (0.16), and limits for Formula Presented and Formula Presented (Formula Presented and Formula Presented) of 0.22 (0.21), assuming a new-physics energy scale Formula Presented of 1 TeV.

Original language	English (US)
Article number	032019
Journal	Physical Review D
Volume	108
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.108.032019
State	Published - Aug 1 2023

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevD.108.032019

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@article{aca956c705b54bb4bb2162be1494868d,

title = "Search for flavor-changing neutral-current couplings between the top quark and the Z boson with proton-proton collisions at √s=13 TeV with the ATLAS detector",

abstract = "A search for flavor-changing neutral-current couplings between a top quark, an up or charm quark, and a Formula Presented boson is presented, using proton-proton collision data at Formula Presented collected by the ATLAS detector at the Large Hadron Collider. The analyzed data set corresponds to an integrated luminosity of Formula Presented. The search targets both single-top-quark events produced as Formula Presented (with Formula Presented, Formula Presented) and top-quark-pair events, with one top quark decaying through the Formula Presented channel. The analysis considers events with three leptons (electrons or muons), a Formula Presented-tagged jet, possible additional jets, and missing transverse momentum. The data are found to be consistent with the background-only hypothesis and 95% confidence-level limits on the Formula Presented branching ratios, assuming only tensor operators of the Standard Model effective field theory framework contribute to the Formula Presented vertices. These are Formula Presented (Formula Presented) for Formula Presented (Formula Presented) for a left-handed Formula Presented coupling, and Formula Presented (Formula Presented) in the case of a right-handed coupling. These results are interpreted as 95% CL upper limits on the strength of the corresponding couplings, yielding limits for Formula Presented and Formula Presented (Formula Presented and Formula Presented) of 0.15 (0.16), and limits for Formula Presented and Formula Presented (Formula Presented and Formula Presented) of 0.22 (0.21), assuming a new-physics energy scale Formula Presented of 1 TeV.",

author = "{Atlas Collaboration} and P. Jackson and Kong, {A. X.Y.} and H. Potti and Ruggeri, {T. A.} and Sharma, {A. S.} and Ting, {E. X.L.} and White, {M. J.} and Gingrich, {D. M.} and Lindon, {J. H.} and N. Nishu and Pinfold, {J. L.} and O. Cakir and {Duran Yildiz}, H. and S. Kuday and {Turk Cakir}, I. and S. Sultansoy and {Adam Bourdarios}, C. and M. Belfkir and N. Berger and F. Costanza and M. Delmastro and {Di Ciaccio}, L. and L. Franco and C. Goy and T. Guillemin and T. Hryn{\textquoteright}ova and S. J{\'e}z{\'e}quel and I. Koletsou and R. Lafaye and J. Lev{\^e}que and {Lorenzo Martinez}, N. and L. Portales and E. Rossi and {Sanchez Pineda}, A. and E. Sauvan and L. Selem and I. Wingerter-Seez and Y. Abulaiti and Bhopatkar, {V. S.} and S. Chekanov and S. Darmora and Hopkins, {W. H.} and E. Kourlitis and T. LeCompte and J. Love and J. Metcalfe and Mete, {A. S.} and Hooberman, {B. H.} and Neubauer, {M. S.} and Sickles, {A. M.}",

note = "Publisher Copyright: {\textcopyright} 2023 CERN, for the ATLAS Collaboration.",

year = "2023",

month = aug,

day = "1",

doi = "10.1103/PhysRevD.108.032019",

language = "English (US)",

volume = "108",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - Search for flavor-changing neutral-current couplings between the top quark and the Z boson with proton-proton collisions at √s=13 TeV with the ATLAS detector

AU - Atlas Collaboration

AU - Jackson, P.

AU - Kong, A. X.Y.

AU - Potti, H.

AU - Ruggeri, T. A.

AU - Sharma, A. S.

AU - Ting, E. X.L.

AU - White, M. J.

AU - Gingrich, D. M.

AU - Lindon, J. H.

AU - Nishu, N.

AU - Pinfold, J. L.

AU - Cakir, O.

AU - Duran Yildiz, H.

AU - Kuday, S.

AU - Turk Cakir, I.

AU - Sultansoy, S.

AU - Adam Bourdarios, C.

AU - Belfkir, M.

AU - Berger, N.

AU - Costanza, F.

AU - Delmastro, M.

AU - Di Ciaccio, L.

AU - Franco, L.

AU - Goy, C.

AU - Guillemin, T.

AU - Hryn’ova, T.

AU - Jézéquel, S.

AU - Koletsou, I.

AU - Lafaye, R.

AU - Levêque, J.

AU - Lorenzo Martinez, N.

AU - Portales, L.

AU - Rossi, E.

AU - Sanchez Pineda, A.

AU - Sauvan, E.

AU - Selem, L.

AU - Wingerter-Seez, I.

AU - Abulaiti, Y.

AU - Bhopatkar, V. S.

AU - Chekanov, S.

AU - Darmora, S.

AU - Hopkins, W. H.

AU - Kourlitis, E.

AU - LeCompte, T.

AU - Love, J.

AU - Metcalfe, J.

AU - Mete, A. S.

AU - Hooberman, B. H.

AU - Neubauer, M. S.

AU - Sickles, A. M.

PY - 2023/8/1

Y1 - 2023/8/1

N2 - A search for flavor-changing neutral-current couplings between a top quark, an up or charm quark, and a Formula Presented boson is presented, using proton-proton collision data at Formula Presented collected by the ATLAS detector at the Large Hadron Collider. The analyzed data set corresponds to an integrated luminosity of Formula Presented. The search targets both single-top-quark events produced as Formula Presented (with Formula Presented, Formula Presented) and top-quark-pair events, with one top quark decaying through the Formula Presented channel. The analysis considers events with three leptons (electrons or muons), a Formula Presented-tagged jet, possible additional jets, and missing transverse momentum. The data are found to be consistent with the background-only hypothesis and 95% confidence-level limits on the Formula Presented branching ratios, assuming only tensor operators of the Standard Model effective field theory framework contribute to the Formula Presented vertices. These are Formula Presented (Formula Presented) for Formula Presented (Formula Presented) for a left-handed Formula Presented coupling, and Formula Presented (Formula Presented) in the case of a right-handed coupling. These results are interpreted as 95% CL upper limits on the strength of the corresponding couplings, yielding limits for Formula Presented and Formula Presented (Formula Presented and Formula Presented) of 0.15 (0.16), and limits for Formula Presented and Formula Presented (Formula Presented and Formula Presented) of 0.22 (0.21), assuming a new-physics energy scale Formula Presented of 1 TeV.

AB - A search for flavor-changing neutral-current couplings between a top quark, an up or charm quark, and a Formula Presented boson is presented, using proton-proton collision data at Formula Presented collected by the ATLAS detector at the Large Hadron Collider. The analyzed data set corresponds to an integrated luminosity of Formula Presented. The search targets both single-top-quark events produced as Formula Presented (with Formula Presented, Formula Presented) and top-quark-pair events, with one top quark decaying through the Formula Presented channel. The analysis considers events with three leptons (electrons or muons), a Formula Presented-tagged jet, possible additional jets, and missing transverse momentum. The data are found to be consistent with the background-only hypothesis and 95% confidence-level limits on the Formula Presented branching ratios, assuming only tensor operators of the Standard Model effective field theory framework contribute to the Formula Presented vertices. These are Formula Presented (Formula Presented) for Formula Presented (Formula Presented) for a left-handed Formula Presented coupling, and Formula Presented (Formula Presented) in the case of a right-handed coupling. These results are interpreted as 95% CL upper limits on the strength of the corresponding couplings, yielding limits for Formula Presented and Formula Presented (Formula Presented and Formula Presented) of 0.15 (0.16), and limits for Formula Presented and Formula Presented (Formula Presented and Formula Presented) of 0.22 (0.21), assuming a new-physics energy scale Formula Presented of 1 TeV.

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UR - http://www.scopus.com/inward/citedby.url?scp=85175415464&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.108.032019

DO - 10.1103/PhysRevD.108.032019

M3 - Article

AN - SCOPUS:85175415464

SN - 2470-0010

VL - 108

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - 032019

ER -