Test of lepton universality with Λ0b→pK−ℓ+ℓ−Λb0→pK−ℓ+ℓ− decays; Journal of High Energy Physics; Vol. 2020, iss. 5

Test of lepton universality with Λ0b→pK−ℓ+ℓ−Λb0→pK−ℓ+ℓ− decays; Journal of High Energy Physics; Vol. 2020, iss. 5

Bibliografiska uppgifter
Parent link:Journal of High Energy Physics
Vol. 2020, iss. 5.— 2020.— [40, 26 p.]
Institutionella upphovsmän: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники
Övriga upphovsmän: Aaij R. Roel, Beteta C. A. Carlos Abellan, Ackernley T., Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich
Sammanfattning:Title screen
The ratio of branching fractions of the decays Λ0bΛb0 → pK−e+e− and Λ0bΛb0 → pK−μ+μ−,R−1pKRpK−1, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb−1 recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilepton mass-squared range 0.1 < q2< 6.0 GeV2/c4 and the pK− mass range m(pK−) < 2600 MeV/c2, the ratio of branching fractions is measured to be R−1pK=1.17+0.18−0.16±0.07RpK−1=1.17−0.16+0.18±0.07, where the first uncertainty is statistical and the second systematic. This is the first test of lepton universality with b baryons and the first observation of the decay Λ0bΛb0 → pK−e+e−.
Språk:engelska
Publicerad: 2020
Ämnen:
электронный ресурс
труды учёных ТПУ
B physics
branching fraction
Flavour Changing Neutral Currents
rare decay
Hadron- Hadron scattering (experiments)
Länkar:http://earchive.tpu.ru/handle/11683/64813
https://doi.org/10.1007/JHEP05(2020)040
Materialtyp: Elektronisk Bokavsnitt
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662341

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