Measurement of the relative B−→D0/D*0/D**0μ−¯νμ branching fractions using B− mesons from ¯B*0s2 decays; Physical Review D; Vol. 99, iss. 9

Measurement of the relative B−→D0/D*0/D**0μ−¯νμ branching fractions using B− mesons from ¯B*0s2 decays; Physical Review D; Vol. 99, iss. 9

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Parent link:Physical Review D: particles, fields, gravitation, and cosmology
Vol. 99, iss. 9.— 2019.— [092009 , 16 p.]
Korporace: Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники (ОАР), Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Další autoři: Aaij R. Roel, Beteta C. A. Carlos Abellan, Adeva B. Bernardo, Shapkin M. M. Mikhail Mikhaylovich, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich
Shrnutí:Title screen
The decay of the narrow resonance ¯B*0s2→B−K+ can be used to determine the B− momentum in partially reconstructed decays without any assumptions on the decay products of the B− meson. This technique is employed for the first time to distinguish contributions from D0, D*0, and higher-mass charmed states (D**0) in semileptonic B− decays by using the missing-mass distribution. The measurement is performed using a data sample corresponding to an integrated luminosity of 3.0  fb−1 collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV. The resulting branching fractions relative to the inclusive B−→D0Xμ−¯νμ arefD0=B(B−→D0μ−¯νμ)/B(B−→D0Xμ−¯νμ)=0.25±0.06,fD**0=B(B−→(D**0→D0X)μ−¯νμ)/B(B−→D0Xμ−¯νμ)=0.21±0.07,with fD*0=1−fD0−fD**0 making up the remainder.
Jazyk:angličtina
Vydáno: 2019
Témata:
электронный ресурс
труды учёных ТПУ
On-line přístup:https://doi.org/10.1103/PhysRevD.99.092009
Médium: xMaterials Elektronický zdroj Kapitola
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663432
Popis
Shrnutí:Title screen
The decay of the narrow resonance ¯B*0s2→B−K+ can be used to determine the B− momentum in partially reconstructed decays without any assumptions on the decay products of the B− meson. This technique is employed for the first time to distinguish contributions from D0, D*0, and higher-mass charmed states (D**0) in semileptonic B− decays by using the missing-mass distribution. The measurement is performed using a data sample corresponding to an integrated luminosity of 3.0  fb−1 collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV. The resulting branching fractions relative to the inclusive B−→D0Xμ−¯νμ arefD0=B(B−→D0μ−¯νμ)/B(B−→D0Xμ−¯νμ)=0.25±0.06,fD**0=B(B−→(D**0→D0X)μ−¯νμ)/B(B−→D0Xμ−¯νμ)=0.21±0.07,with fD*0=1−fD0−fD**0 making up the remainder.
DOI:10.1103/PhysRevD.99.092009

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