Search for production of four top quarks in final states with same-sign or multiple leptons in proton–proton collisions at √s=13TeV

Standard

Search for production of four top quarks in final states with same-sign or multiple leptons in proton–proton collisions at √s=13TeV. / The CMS collaboration; Барняков, Александр Юрьевич; Блинов, Владимир Евгеньевич.

In: European Physical Journal C, Vol. 80, No. 2, 75, 31.01.2020.

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

BibTeX

@article{b6b49c166b1a48d3beb9a58cde9b1724,

title = "Search for production of four top quarks in final states with same-sign or multiple leptons in proton–proton collisions at √s=13TeV",

abstract = "The standard model (SM) production of four top quarks (t t ¯ t t ¯) in proton–proton collisions is studied by the CMS Collaboration. The data sample, collected during the 2016–2018 data taking of the LHC, corresponds to an integrated luminosity of 137fb-1 at a center-of-mass energy of 13TeV. The events are required to contain two same-sign charged leptons (electrons or muons) or at least three leptons, and jets. The observed and expected significances for the t t ¯ t t ¯ signal are respectively 2.6 and 2.7 standard deviations, and the t t ¯ t t ¯ cross section is measured to be 12.6-5.2+5.8fb. The results are used to constrain the Yukawa coupling of the top quark to the Higgs boson, yt, yielding a limit of |yt/ytSM|<1.7 at 95 % confidence level, where ytSM is the SM value of yt. They are also used to constrain the oblique parameter of the Higgs boson in an effective field theory framework, H^ < 0.12. Limits are set on the production of a heavy scalar or pseudoscalar boson in Type-II two-Higgs-doublet and simplified dark matter models, with exclusion limits reaching 350–470GeV and 350–550GeV for scalar and pseudoscalar bosons, respectively. Upper bounds are also set on couplings of the top quark to new light particles.",

keywords = "DECAY, EXTENSION, INVARIANT, MODEL",

author = "{The CMS collaboration} and Sirunyan, {A. M.} and A. Tumasyan and W. Adam and F. Ambrogi and T. Bergauer and J. Brandstetter and M. Dragicevic and J. Er{\"o} and {Del Valle}, {A. Escalante} and M. Flechl and R. Fr{\"u}hwirth and M. Jeitler and N. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Madlener and I. Mikulec and N. Rad and J. Schieck and R. Sch{\"o}fbeck and M. Spanring and D. Spitzbart and W. Waltenberger and Wulz, {C. E.} and M. Zarucki and V. Drugakov and V. Mossolov and {Suarez Gonzalez}, J. and Darwish, {M. R.} and {De Wolf}, {E. A.} and {Di Croce}, D. and X. Janssen and A. Lelek and M. Pieters and Sfar, {H. Rejeb} and {Van Haevermaet}, H. and {Van Mechelen}, P. and {Van Putte}, S. and {Van Remortel}, N. and F. Blekman and Bols, {E. S.} and Chhibra, {S. S.} and J. D{\textquoteright}Hondt and {De Clercq}, J. and D. Lontkovskyi and S. Lowette and I. Marchesini and T. Dimova and L. Kardapoltsev and Y. Skovpen and Барняков, {Александр Юрьевич} and Блинов, {Владимир Евгеньевич}",

note = "{\textcopyright} CERN for the benefit of the CMS collaboration 2020.",

year = "2020",

month = jan,

day = "31",

doi = "10.1140/epjc/s10052-019-7593-7",

language = "English",

volume = "80",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "2",

}

RIS

TY - JOUR

T1 - Search for production of four top quarks in final states with same-sign or multiple leptons in proton–proton collisions at √s=13TeV

AU - The CMS collaboration

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Ambrogi, F.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Dragicevic, M.

AU - Erö, J.

AU - Del Valle, A. Escalante

AU - Flechl, M.

AU - Frühwirth, R.

AU - Jeitler, M.

AU - Krammer, N.

AU - Krätschmer, I.

AU - Liko, D.

AU - Madlener, T.

AU - Mikulec, I.

AU - Rad, N.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Spanring, M.

AU - Spitzbart, D.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Drugakov, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - Darwish, M. R.

AU - De Wolf, E. A.

AU - Di Croce, D.

AU - Janssen, X.

AU - Lelek, A.

AU - Pieters, M.

AU - Sfar, H. Rejeb

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Putte, S.

AU - Van Remortel, N.

AU - Blekman, F.

AU - Bols, E. S.

AU - Chhibra, S. S.

AU - D’Hondt, J.

AU - De Clercq, J.

AU - Lontkovskyi, D.

AU - Lowette, S.

AU - Marchesini, I.

AU - Dimova, T.

AU - Kardapoltsev, L.

AU - Skovpen, Y.

AU - Барняков, Александр Юрьевич

AU - Блинов, Владимир Евгеньевич

PY - 2020/1/31

Y1 - 2020/1/31

N2 - The standard model (SM) production of four top quarks (t t ¯ t t ¯) in proton–proton collisions is studied by the CMS Collaboration. The data sample, collected during the 2016–2018 data taking of the LHC, corresponds to an integrated luminosity of 137fb-1 at a center-of-mass energy of 13TeV. The events are required to contain two same-sign charged leptons (electrons or muons) or at least three leptons, and jets. The observed and expected significances for the t t ¯ t t ¯ signal are respectively 2.6 and 2.7 standard deviations, and the t t ¯ t t ¯ cross section is measured to be 12.6-5.2+5.8fb. The results are used to constrain the Yukawa coupling of the top quark to the Higgs boson, yt, yielding a limit of |yt/ytSM|<1.7 at 95 % confidence level, where ytSM is the SM value of yt. They are also used to constrain the oblique parameter of the Higgs boson in an effective field theory framework, H^ < 0.12. Limits are set on the production of a heavy scalar or pseudoscalar boson in Type-II two-Higgs-doublet and simplified dark matter models, with exclusion limits reaching 350–470GeV and 350–550GeV for scalar and pseudoscalar bosons, respectively. Upper bounds are also set on couplings of the top quark to new light particles.

AB - The standard model (SM) production of four top quarks (t t ¯ t t ¯) in proton–proton collisions is studied by the CMS Collaboration. The data sample, collected during the 2016–2018 data taking of the LHC, corresponds to an integrated luminosity of 137fb-1 at a center-of-mass energy of 13TeV. The events are required to contain two same-sign charged leptons (electrons or muons) or at least three leptons, and jets. The observed and expected significances for the t t ¯ t t ¯ signal are respectively 2.6 and 2.7 standard deviations, and the t t ¯ t t ¯ cross section is measured to be 12.6-5.2+5.8fb. The results are used to constrain the Yukawa coupling of the top quark to the Higgs boson, yt, yielding a limit of |yt/ytSM|<1.7 at 95 % confidence level, where ytSM is the SM value of yt. They are also used to constrain the oblique parameter of the Higgs boson in an effective field theory framework, H^ < 0.12. Limits are set on the production of a heavy scalar or pseudoscalar boson in Type-II two-Higgs-doublet and simplified dark matter models, with exclusion limits reaching 350–470GeV and 350–550GeV for scalar and pseudoscalar bosons, respectively. Upper bounds are also set on couplings of the top quark to new light particles.

KW - DECAY

KW - EXTENSION

KW - INVARIANT

KW - MODEL

UR - http://www.scopus.com/inward/record.url?scp=85078848913&partnerID=8YFLogxK

U2 - 10.1140/epjc/s10052-019-7593-7

DO - 10.1140/epjc/s10052-019-7593-7

M3 - Article

C2 - 32108833

AN - SCOPUS:85078848913

VL - 80

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 2

M1 - 75

ER -

ID: 23329989