A measurement of the Higgs boson Yukawa coupling to the top quark is presented using proton-proton collision data at √s=13 TeV, corresponding to an integrated luminosity of 137 fb^{-1}, recorded with the CMS detector. The coupling strength with respect to the standard model value, Yt, is determined from kinematic distributions in ttbar final states containing ee, μμ, or eμ pairs. Variations of the Yukawa coupling strength lead to modified distributions for ttbar production. In particular, the distributions of the mass of the ttbar system and the rapidity difference of the top quark and antiquark are sensitive to the value of Yt. The measurement yields a best fit value of Yt=1.16-0.35+0.24, bounding Yt<1.54 at a 95% confidence level.

Measurement of the top quark Yukawa coupling from t-tbar kinematic distributions in the dilepton final state in proton-proton collisions at √s=13  TeV

Amapane N.;Argiro S.;Bellan R.;Cappati A.;Costa M.;Covarelli R.;Kiani B.;Migliore E.;Monaco V.;Monteil E.;Obertino M. M.;Pacher L.;Pinna Angioni G. L.;Salvatico R.;Siviero F.;Sola V.;Solano A.;Soldi D.;Shchelina K.;Rumerio P.;Ravera F.;
2020-01-01

Abstract

A measurement of the Higgs boson Yukawa coupling to the top quark is presented using proton-proton collision data at √s=13 TeV, corresponding to an integrated luminosity of 137 fb^{-1}, recorded with the CMS detector. The coupling strength with respect to the standard model value, Yt, is determined from kinematic distributions in ttbar final states containing ee, μμ, or eμ pairs. Variations of the Yukawa coupling strength lead to modified distributions for ttbar production. In particular, the distributions of the mass of the ttbar system and the rapidity difference of the top quark and antiquark are sensitive to the value of Yt. The measurement yields a best fit value of Yt=1.16-0.35+0.24, bounding Yt<1.54 at a 95% confidence level.
2020
Inglese
Esperti anonimi
102
9
1
29
29
GERMANIA
1 – prodotto con file in versione Open Access (allegherò il file al passo 6 - Carica)
262
2364
Sirunyan A.M.; Tumasyan A.; Adam W.; Ambrogi F.; Bergauer T.; Dragicevic M.; Ero J.; Escalante Del Valle A.; Fruhwirth R.; Jeitler M.; Krammer N.; Lec...espandi
info:eu-repo/semantics/article
open
03-CONTRIBUTO IN RIVISTA::03A-Articolo su Rivista
File in questo prodotto:
File Dimensione Formato  
Sirunyan2020_Measurement-of-the-top-quark-Yukawa-coupling-from-ttbar-kinematic-distributions.pdf

Accesso aperto

Tipo di file: PDF EDITORIALE
Dimensione 1.06 MB
Formato Adobe PDF
1.06 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1840879
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 18
  • ???jsp.display-item.citation.isi??? 11
social impact