Search for pair and single production of vectorlike quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at root s=13 TeV

M. Aaboud; G. Aad; B. Abbott; O. Abdinov; B Abeloos; DK Abhayasinghe; S.H. Abidi; Ossama Sherif Alexander Abouzeid; NL Abraham; H. Abramowicz; H. Abreu; Y. Abulaiti; B.S. Acharya; Sosuke Adachi; L. Adamczyk; J. Adelman; M. Adersberger; A. Adiguzel; T. Adye; A. A. Affolder; Y.  Afik; C. Agheorghiesei; J. A. Aguilar-Saavedra; F. Ahmadov; Alejandro Alonso Diaz; Mogens Dam; Peter Henrik Hansen; Jørn Dines Hansen; Jørgen Beck Hansen; Flavia de Almeida Dias; Geert-Jan Besjes; Milena Bajic; Gorm Aske Gram Krohn Galster; Troels Christian Petersen; Fabian A.J. Thiele; James William Monk; Simon Holm Stark; Graig Wiglesworth; Stefania Xella

doi:10.1103/PhysRevD.98.112010

Search for pair and single production of vectorlike quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at root s=13 TeV

M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B Abeloos, DK Abhayasinghe, S.H. Abidi, Ossama Sherif Alexander Abouzeid, NL Abraham, H. Abramowicz, H. Abreu, Y. Abulaiti, B.S. Acharya, Sosuke Adachi, L. Adamczyk, J. Adelman, M. Adersberger, A. Adiguzel, T. Adye, A. A. AffolderY. Afik, C. Agheorghiesei, J. A. Aguilar-Saavedra, F. Ahmadov, Alejandro Alonso Diaz, Mogens Dam, Peter Henrik Hansen, Jørn Dines Hansen, Jørgen Beck Hansen, Flavia de Almeida Dias, Geert-Jan Besjes, Milena Bajic, Gorm Aske Gram Krohn Galster, Troels Christian Petersen, Fabian A.J. Thiele, James William Monk, Simon Holm Stark, Graig Wiglesworth, Stefania Xella

Eksperimentel subatomar fysik

35 Citationer (Scopus)

43 Downloads (Pure)

Abstract

A search for vectorlike quarks is presented, which targets their decay into a Z boson and a third-generation Standard Model quark. In the case of a vectorlike quark T (B) with charge +2/3e (-1/3e), the decay searched for is T→Zt (B→Zb). Data for this analysis were taken during 2015 and 2016 with the ATLAS detector at the Large Hadron Collider and correspond to an integrated luminosity of 36.1 fb-1 of pp collisions at s=13 TeV. The final state used is characterized by the presence of b-tagged jets, as well as a Z boson with high transverse momentum, which is reconstructed from a pair of opposite-sign same-flavor leptons. Pair and single production of vectorlike quarks are both taken into account and are each searched for using optimized dileptonic exclusive and trileptonic inclusive event selections. In these selections, the high scalar sum of jet transverse momenta, the presence of high-transverse-momentum large-radius jets, as well as - in the case of the single-production selections - the presence of forward jets are used. No significant excess over the background-only hypothesis is found and exclusion limits at 95% confidence level allow masses of vectorlike quarks of mT>1030 GeV (mT>1210 GeV) and mB>1010 GeV (mB>1140 GeV) in the singlet (doublet) model. In the case of 100% branching ratio for T→Zt (B→Zb), the limits are mT>1340 GeV (mB>1220 GeV). Limits at 95% confidence level are also set on the coupling to Standard Model quarks for given vectorlike quark masses.

Originalsprog	Engelsk
Artikelnummer	112010
Tidsskrift	Physical Review D
Vol/bind	98
Udgave nummer	11
Antal sider	53
ISSN	2470-0010
DOI	https://doi.org/10.1103/PhysRevD.98.112010
Status	Udgivet - 1 dec. 2018

Adgang til dokumentet

10.1103/PhysRevD.98.112010Licens: CC BY

PhysRevD.98.112010Forlagets udgivne version, 1,44 MB

Fingeraftryk

Dyk ned i forskningsemnerne om 'Search for pair and single production of vectorlike quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at root s=13 TeV'. Sammen danner de et unikt fingeraftryk.

Citationsformater

Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abhayasinghe, DK., Abidi, S. H., Abouzeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adiguzel, A., Adye, T., ... Xella, S. (2018). Search for pair and single production of vectorlike quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at root s=13 TeV. Physical Review D, 98(11), Artikel 112010. https://doi.org/10.1103/PhysRevD.98.112010

Search for pair and single production of vectorlike quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at root s=13 TeV. / Aaboud, M.; Aad, G.; Abbott, B. et al.
I: Physical Review D, Bind 98, Nr. 11, 112010, 01.12.2018.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, Abouzeid, OSA, Abraham, NL, Abramowicz, H, Abreu, H, Abulaiti, Y, Acharya, BS, Adachi, S, Adamczyk, L, Adelman, J, Adersberger, M, Adiguzel, A, Adye, T, Affolder, AA, Afik, Y, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmadov, F, Alonso Diaz, A, Dam, M , Hansen, PH , Hansen, JD , Hansen, JB, de Almeida Dias, F, Besjes, G-J, Bajic, M, Galster, GAGK, Petersen, TC, Thiele, FAJ, Monk, JW, Stark, SH, Wiglesworth, G & Xella, S 2018, 'Search for pair and single production of vectorlike quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at root s=13 TeV', Physical Review D, bind 98, nr. 11, 112010. https://doi.org/10.1103/PhysRevD.98.112010

@article{2e80f54e6632442799ad955c0a954f2e,

title = "Search for pair and single production of vectorlike quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at root s=13 TeV",

abstract = "A search for vectorlike quarks is presented, which targets their decay into a Z boson and a third-generation Standard Model quark. In the case of a vectorlike quark T (B) with charge +2/3e (-1/3e), the decay searched for is T→Zt (B→Zb). Data for this analysis were taken during 2015 and 2016 with the ATLAS detector at the Large Hadron Collider and correspond to an integrated luminosity of 36.1 fb-1 of pp collisions at s=13 TeV. The final state used is characterized by the presence of b-tagged jets, as well as a Z boson with high transverse momentum, which is reconstructed from a pair of opposite-sign same-flavor leptons. Pair and single production of vectorlike quarks are both taken into account and are each searched for using optimized dileptonic exclusive and trileptonic inclusive event selections. In these selections, the high scalar sum of jet transverse momenta, the presence of high-transverse-momentum large-radius jets, as well as - in the case of the single-production selections - the presence of forward jets are used. No significant excess over the background-only hypothesis is found and exclusion limits at 95% confidence level allow masses of vectorlike quarks of mT>1030 GeV (mT>1210 GeV) and mB>1010 GeV (mB>1140 GeV) in the singlet (doublet) model. In the case of 100% branching ratio for T→Zt (B→Zb), the limits are mT>1340 GeV (mB>1220 GeV). Limits at 95% confidence level are also set on the coupling to Standard Model quarks for given vectorlike quark masses.",

author = "M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B Abeloos and DK Abhayasinghe and S.H. Abidi and Abouzeid, {Ossama Sherif Alexander} and NL Abraham and H. Abramowicz and H. Abreu and Y. Abulaiti and B.S. Acharya and Sosuke Adachi and L. Adamczyk and J. Adelman and M. Adersberger and A. Adiguzel and T. Adye and Affolder, {A. A.} and Y. Afik and C. Agheorghiesei and Aguilar-Saavedra, {J. A.} and F. Ahmadov and {Alonso Diaz}, Alejandro and Mogens Dam and Hansen, {Peter Henrik} and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and {de Almeida Dias}, Flavia and Geert-Jan Besjes and Milena Bajic and Galster, {Gorm Aske Gram Krohn} and Petersen, {Troels Christian} and Thiele, {Fabian A.J.} and Monk, {James William} and Stark, {Simon Holm} and Graig Wiglesworth and Stefania Xella",

year = "2018",

month = dec,

day = "1",

doi = "10.1103/PhysRevD.98.112010",

language = "English",

volume = "98",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "11",

}

TY - JOUR

T1 - Search for pair and single production of vectorlike quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at root s=13 TeV

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B

AU - Abhayasinghe, DK

AU - Abidi, S.H.

AU - Abouzeid, Ossama Sherif Alexander

AU - Abraham, NL

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B.S.

AU - Adachi, Sosuke

AU - Adamczyk, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmadov, F.

AU - Alonso Diaz, Alejandro

AU - Dam, Mogens

AU - Hansen, Peter Henrik

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - de Almeida Dias, Flavia

AU - Besjes, Geert-Jan

AU - Bajic, Milena

AU - Galster, Gorm Aske Gram Krohn

AU - Petersen, Troels Christian

AU - Thiele, Fabian A.J.

AU - Monk, James William

AU - Stark, Simon Holm

AU - Wiglesworth, Graig

AU - Xella, Stefania

PY - 2018/12/1

Y1 - 2018/12/1

N2 - A search for vectorlike quarks is presented, which targets their decay into a Z boson and a third-generation Standard Model quark. In the case of a vectorlike quark T (B) with charge +2/3e (-1/3e), the decay searched for is T→Zt (B→Zb). Data for this analysis were taken during 2015 and 2016 with the ATLAS detector at the Large Hadron Collider and correspond to an integrated luminosity of 36.1 fb-1 of pp collisions at s=13 TeV. The final state used is characterized by the presence of b-tagged jets, as well as a Z boson with high transverse momentum, which is reconstructed from a pair of opposite-sign same-flavor leptons. Pair and single production of vectorlike quarks are both taken into account and are each searched for using optimized dileptonic exclusive and trileptonic inclusive event selections. In these selections, the high scalar sum of jet transverse momenta, the presence of high-transverse-momentum large-radius jets, as well as - in the case of the single-production selections - the presence of forward jets are used. No significant excess over the background-only hypothesis is found and exclusion limits at 95% confidence level allow masses of vectorlike quarks of mT>1030 GeV (mT>1210 GeV) and mB>1010 GeV (mB>1140 GeV) in the singlet (doublet) model. In the case of 100% branching ratio for T→Zt (B→Zb), the limits are mT>1340 GeV (mB>1220 GeV). Limits at 95% confidence level are also set on the coupling to Standard Model quarks for given vectorlike quark masses.

AB - A search for vectorlike quarks is presented, which targets their decay into a Z boson and a third-generation Standard Model quark. In the case of a vectorlike quark T (B) with charge +2/3e (-1/3e), the decay searched for is T→Zt (B→Zb). Data for this analysis were taken during 2015 and 2016 with the ATLAS detector at the Large Hadron Collider and correspond to an integrated luminosity of 36.1 fb-1 of pp collisions at s=13 TeV. The final state used is characterized by the presence of b-tagged jets, as well as a Z boson with high transverse momentum, which is reconstructed from a pair of opposite-sign same-flavor leptons. Pair and single production of vectorlike quarks are both taken into account and are each searched for using optimized dileptonic exclusive and trileptonic inclusive event selections. In these selections, the high scalar sum of jet transverse momenta, the presence of high-transverse-momentum large-radius jets, as well as - in the case of the single-production selections - the presence of forward jets are used. No significant excess over the background-only hypothesis is found and exclusion limits at 95% confidence level allow masses of vectorlike quarks of mT>1030 GeV (mT>1210 GeV) and mB>1010 GeV (mB>1140 GeV) in the singlet (doublet) model. In the case of 100% branching ratio for T→Zt (B→Zb), the limits are mT>1340 GeV (mB>1220 GeV). Limits at 95% confidence level are also set on the coupling to Standard Model quarks for given vectorlike quark masses.

U2 - 10.1103/PhysRevD.98.112010

DO - 10.1103/PhysRevD.98.112010

M3 - Journal article

SN - 2470-0010

VL - 98

JO - Physical Review D

JF - Physical Review D

IS - 11

M1 - 112010

ER -