Search for standard model production of four top quarks in proton–proton collisions at s=13 TeV

Standard

Search for standard model production of four top quarks in proton–proton collisions at s=13 TeV. / The CMS collaboration.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 772, 10.09.2017, p. 336-358.

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

Harvard

The CMS collaboration 2017, 'Search for standard model production of four top quarks in proton–proton collisions at s=13 TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 772, pp. 336-358. https://doi.org/10.1016/j.physletb.2017.06.064

APA

The CMS collaboration (2017). Search for standard model production of four top quarks in proton–proton collisions at s=13 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 772, 336-358. https://doi.org/10.1016/j.physletb.2017.06.064

Vancouver

The CMS collaboration. Search for standard model production of four top quarks in proton–proton collisions at s=13 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2017 Sept 10;772:336-358. doi: 10.1016/j.physletb.2017.06.064

Author

The CMS collaboration. / Search for standard model production of four top quarks in proton–proton collisions at s=13 TeV. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2017 ; Vol. 772. pp. 336-358.

BibTeX

@article{b47b48ea443b42c9b04d9b6c551807c1,

title = "Search for standard model production of four top quarks in proton–proton collisions at s=13 TeV",

abstract = "A search for events containing four top quarks (tt¯tt¯) is reported from proton–proton collisions recorded by the CMS experiment at s=13 TeV and corresponding to an integrated luminosity of 2.6 fb−1. The analysis considers the single-lepton (e or μ)+jets and the opposite-sign dilepton (μ+μ−, μ±e∓, or e+e−)+jets channels. It uses boosted decision trees to combine information on the global event and jet properties to distinguish between tt¯tt¯ and tt¯ production. The number of events observed after all selection requirements is consistent with expectations from background and standard model signal predictions, and an upper limit is set on the cross section for tt¯tt¯ production in the standard model of 94 fb at 95% confidence level (10.2 × the prediction), with an expected limit of 118 fb. This is combined with the results from the published CMS search in the same-sign dilepton channel, resulting in an improved limit of 69 fb at 95% confidence level (7.4 × the prediction), with an expected limit of 71 fb. These are the strongest constraints on the rate of tt¯tt¯ production to date.",

keywords = "BSM, CMS, Physics, Top, CROSS-SECTION",

author = "{The CMS collaboration} and Sirunyan, {A. M.} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, {V. M.} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and A. K{\"o}nig and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and N. Rad and B. Rahbaran and H. Rohringer and J. Schieck and J. Strauss and W. Waltenberger and Wulz, {C. E.} and O. Dvornikov and V. Makarenko and V. Mossolov and {Suarez Gonzalez}, J. and V. Zykunov and N. Shumeiko and S. Alderweireldt and {De Wolf}, {E. A.} and X. Janssen and J. Lauwers and {Van De Klundert}, M. and {Van Haevermaet}, H. and {Van Mechelen}, P. and {Van Remortel}, N. and {Van Spilbeeck}, A. and {Abu Zeid}, S. and F. Blekman and J. D'Hondt and Y. Skovpen and D. Shtol",

note = "Publisher Copyright: {\textcopyright} 2017 The Author(s)",

year = "2017",

month = sep,

day = "10",

doi = "10.1016/j.physletb.2017.06.064",

language = "English",

volume = "772",

pages = "336--358",

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

issn = "0370-2693",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Search for standard model production of four top quarks in proton–proton collisions at s=13 TeV

AU - The CMS collaboration

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - König, A.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rad, N.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Strauss, J.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Dvornikov, O.

AU - Makarenko, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - Zykunov, V.

AU - Shumeiko, N.

AU - Alderweireldt, S.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Lauwers, J.

AU - Van De Klundert, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

AU - Van Spilbeeck, A.

AU - Abu Zeid, S.

AU - Blekman, F.

AU - D'Hondt, J.

AU - Skovpen, Y.

AU - Shtol, D.

PY - 2017/9/10

Y1 - 2017/9/10

N2 - A search for events containing four top quarks (tt¯tt¯) is reported from proton–proton collisions recorded by the CMS experiment at s=13 TeV and corresponding to an integrated luminosity of 2.6 fb−1. The analysis considers the single-lepton (e or μ)+jets and the opposite-sign dilepton (μ+μ−, μ±e∓, or e+e−)+jets channels. It uses boosted decision trees to combine information on the global event and jet properties to distinguish between tt¯tt¯ and tt¯ production. The number of events observed after all selection requirements is consistent with expectations from background and standard model signal predictions, and an upper limit is set on the cross section for tt¯tt¯ production in the standard model of 94 fb at 95% confidence level (10.2 × the prediction), with an expected limit of 118 fb. This is combined with the results from the published CMS search in the same-sign dilepton channel, resulting in an improved limit of 69 fb at 95% confidence level (7.4 × the prediction), with an expected limit of 71 fb. These are the strongest constraints on the rate of tt¯tt¯ production to date.

AB - A search for events containing four top quarks (tt¯tt¯) is reported from proton–proton collisions recorded by the CMS experiment at s=13 TeV and corresponding to an integrated luminosity of 2.6 fb−1. The analysis considers the single-lepton (e or μ)+jets and the opposite-sign dilepton (μ+μ−, μ±e∓, or e+e−)+jets channels. It uses boosted decision trees to combine information on the global event and jet properties to distinguish between tt¯tt¯ and tt¯ production. The number of events observed after all selection requirements is consistent with expectations from background and standard model signal predictions, and an upper limit is set on the cross section for tt¯tt¯ production in the standard model of 94 fb at 95% confidence level (10.2 × the prediction), with an expected limit of 118 fb. This is combined with the results from the published CMS search in the same-sign dilepton channel, resulting in an improved limit of 69 fb at 95% confidence level (7.4 × the prediction), with an expected limit of 71 fb. These are the strongest constraints on the rate of tt¯tt¯ production to date.

KW - BSM

KW - CMS

KW - Physics

KW - Top

KW - CROSS-SECTION

UR - http://www.scopus.com/inward/record.url?scp=85029863039&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2017.06.064

DO - 10.1016/j.physletb.2017.06.064

M3 - Article

AN - SCOPUS:85029863039

VL - 772

SP - 336

EP - 358

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

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

SN - 0370-2693

ER -

ID: 10068307