Title
Search for tth production in the all-jet final state in proton-proton collisions at √s = 13 TeV
Date Issued
01 January 2018
Access level
open access
Resource Type
journal article
Author(s)
Sirunyan A.M.
Tumasyan A.
Adam W.
Ambrogi F.
Asilar E.
Bergauer T.
Brandstetter J.
Brondolin E.
Dragicevic M.
Erö J.
Escalante Del Valle A.
Flechl M.
Friedl M.
Frühwirth R.
Ghete V.M.
Grossmann J.
Hrubec J.
Jeitler M.
König A.
Krammer N.
Krätschmer I.
Liko D.
Madlener T.
Mikulec I.
Pree E.
Rad N.
Rohringer H.
Schieck J.
Schöfbeck R.
Spanring M.
Spitzbart D.
Taurok A.
Waltenberger W.
Wittmann J.
Wulz C.E.
Zarucki M.
Chekhovsky V.
Mossolov V.
Suarez Gonzalez J.
De Wolf E.A.
Di Croce D.
Janssen X.
Lauwers J.
Pieters M.
Van De Klundert M.
Van Haevermaet H.
Van Mechelen P.
Van Remortel N.
Abu Zeid S.
Blekman F.
D’hondt J.
De Bruyn I.
De Clercq J.
Deroover K.
Flouris G.
Lontkovskyi D.
Lowette S.
Marchesini I.
Moortgat S.
Moreels L.
Python Q.
Skovpen K.
Tavernier S.
Van Doninck W.
Van Mulders P.
Van Parijs I.
Beghin D.
Bilin B.
Brun H.
Clerbaux B.
De Lentdecker G.
Delannoy H.
Dorney B.
Fasanella G.
Favart L.
Goldouzian R.
Grebenyuk A.
Kalsi A.K.
Lenzi T.
Luetic J.
Seva T.
Starling E.
Vander Velde C.
Vanlaer P.
Vannerom D.
Yonamine R.
Cornelis T.
Dobur D.
Fagot A.
Gul M.
Khvastunov I.
Poyraz D.
Roskas C.
Trocino D.
Tytgat M.
Verbeke W.
Vermassen B.
Vit M.
Zaganidis N.
Bakhshiansohi H.
Publisher(s)
Springer Verlag
Abstract
A search is presented for the associated production of a Higgs boson with a top quark pair in the all-jet final state. Events√ containing seven or more jets are selected from a sample of proton-proton collisions at s = 13 TeV collected with the CMS detector at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1. To separate the ttH signal from the irreducible tt + bb background, the analysis assigns leading order matrix element signal and background probability densities to each event. A likelihood-ratio statistic based on these probability densities is used to extract the signal. The results are provided in terms of an observed ttH signal strength relative to the standard model production cross section µ = σ/σSM, assuming a Higgs boson mass of 125 GeV. The best fit value is ˆµ = 0.9 ± 0.7(stat) ± 1.3(syst) = 0.9 ± 1.5 (tot), and the observed and expected upper limits are, respectively, µ < 3.8 and < 3.1 at 95% confidence levels.
Start page
1
End page
45
Volume
2018
Issue
6
Language
English
OCDE Knowledge area
Química física
Química analítica
Subjects
Scopus EID
2-s2.0-85049914149
Source
Journal of High Energy Physics
ISSN of the container
11266708
Sponsor(s)
Open Access, Copyright CERN, for the benefit of the CMS Collaboration. Article funded by SCOAP3.
MoER, ERC IUT, and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR and RAEP (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI and FEDER (Spain); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCen-ter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (U.S.A.).
We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWFW and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COL-CIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador);
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