Measurement of Bc (2S) + and Bc ? (2S) + Cross Section Ratios İn Proton-Proton Collisions at ? s = 13 TeV

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Küçük Resim

Tarih

2020

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

The CMS Collaboration

Erişim Hakkı

Özet

The ratios of the Bc (2S) + to Bc +, Bc ? (2S) + to Bc +, and Bc ? (2S) + to Bc (2S) + production cross sections are measured in proton-proton collisions at ? s = 13 TeV, using a data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 143 fb?1 . The three measurements are made in the Bc + meson phase space region defined by the transverse momentum pT > 15 GeV and absolute rapidity |y| < 2.4, with the excited Bc (?) (2S) + states reconstructed through the Bc (?)+? +? ?, followed by the Bc + ? J/? ?+ and J/? ? µ +µ ? decays. The Bc (2S) + to Bc +, Bc ? (2S) + to Bc +, and Bc ? (2S) + to Bc (2S) + cross section ratios, including the unknown Bc (?) (2S) + ? Bc (?)+? +? ? branching fractions, are (3.47 ± 0.63 (stat) ± 0.33 (syst))%, (4.69 ± 0.71 (stat) ± 0.56 (syst))%, and 1.35 ± 0.32 (stat) ± 0.09 (syst), respectively. None of these ratios shows a significant dependence on the pT or |y| of the Bc + meson. The normalized dipion invariant mass distributions from the decays Bc (?) (2S) + ?Bc (?)+? +? ? are also reported

Açıklama

Anahtar Kelimeler

Branching fraction, Bottom mesons, Charmed mesons, Hadron colliders

Kaynak

WoS Q Değeri

Q1

Scopus Q Değeri

Q2

Cilt

Sayı

Künye

Phys. Rev. D 102, 092007