Measurements of t¯tH Production and the CP Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel

Measurements of t¯tH Production and the CP Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel

Detaylı Bibliyografya
Parent link:Physical Review Letters
Vol. 125, iss. 6.— 2020.— [061801, 18 p.]
Müşterek Yazar: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Diğer Yazarlar: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich
Özet:Title screen
The first observation of the t¯tH process in a single Higgs boson decay channel with the full reconstruction of the final state (H→γγ) is presented, with a significance of 6.6 standard deviations (σ). The CP structure of Higgs boson couplings to fermions is measured, resulting in an exclusion of the pure CP-odd structure of the top Yukawa coupling at 3.2σ. The measurements are based on a sample of proton-proton collisions at a center-of-mass energy √s=13  TeV collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 137  fb−1. The cross section times branching fraction of the t¯tH process is measured to be σt¯tHBγγ=1.56+0.34−0.32  fb, which is compatible with the standard model prediction of 1.13+0.08−0.11  fb. The fractional contribution of the CP-odd component is measured to be fHttCP=0.00±0.33.
Режим доступа: по договору с организацией-держателем ресурса
Baskı/Yayın Bilgisi: 2020
Konular:
электронный ресурс
труды учёных ТПУ
Online Erişim:https://doi.org/10.1103/PhysRevLett.125.061801
Materyal Türü: Elektronik Kitap Bölümü
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666237

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