First measurement of the CP-violating phase ϕdd¯¯¯sϕsdd¯ in B s 0  → (K+π−)(K−π+) decays

First measurement of the CP-violating phase ϕdd¯¯¯sϕsdd¯ in B s 0  → (K+π−)(K−π+) decays

Bibliographic Details
Parent link:Journal of High Energy Physics
Vol. 3.— 2018.— [140, 32 p.]
Corporate Author: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Other Authors: Aaij R., Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich, Vagner A. R. Aleksandr Rudolfovich
Summary:Title screen
A flavour-tagged decay-time-dependent amplitude analysis of B s 0  → (K+π−)(K−π+) decays is presented in the K±π∓ mass range from 750 to 1600MeV/c2. The analysis uses pp collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb−1. Several quasi-two-body decay modes are considered, corresponding to K±π∓ combinations with spin 0, 1 and 2, which are dominated by the K 0 *(800)0 and K 0 * (1430)0, the K*(892)0 and the K 2 * (1430)0 resonances, respectively. The longitudinal polarisation fraction for the B0s→K∗(892)∘K¯¯¯¯¯∗(892)0Bs0→K∗(892)∘K¯∗(892)0 decay is measured as fL = 0.208 ± 0.032 ± 0.046, where the first uncertainty is statistical and the second is systematic. The first measurement of the mixing-induced CP-violating phase, ϕdd¯¯¯sϕsdd¯, in b→dd¯¯¯sb→dd¯s transitions is performed, yielding a value of ϕdd¯¯¯s=−0.10±0.13(stat)±0.14ϕsdd¯=−0.10±0.13(stat)±0.14 (syst) rad.
Режим доступа: по договору с организацией-держателем ресурса
Published: 2018
Subjects:
электронный ресурс
труды учёных ТПУ
нейтральные частицы
ток
нарушения
осцилляция
Online Access:https://doi.org/10.1007/JHEP03(2018)140
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658163
Description
Summary:Title screen
A flavour-tagged decay-time-dependent amplitude analysis of B s 0  → (K+π−)(K−π+) decays is presented in the K±π∓ mass range from 750 to 1600MeV/c2. The analysis uses pp collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb−1. Several quasi-two-body decay modes are considered, corresponding to K±π∓ combinations with spin 0, 1 and 2, which are dominated by the K 0 *(800)0 and K 0 * (1430)0, the K*(892)0 and the K 2 * (1430)0 resonances, respectively. The longitudinal polarisation fraction for the B0s→K∗(892)∘K¯¯¯¯¯∗(892)0Bs0→K∗(892)∘K¯∗(892)0 decay is measured as fL = 0.208 ± 0.032 ± 0.046, where the first uncertainty is statistical and the second is systematic. The first measurement of the mixing-induced CP-violating phase, ϕdd¯¯¯sϕsdd¯, in b→dd¯¯¯sb→dd¯s transitions is performed, yielding a value of ϕdd¯¯¯s=−0.10±0.13(stat)±0.14ϕsdd¯=−0.10±0.13(stat)±0.14 (syst) rad.
Режим доступа: по договору с организацией-держателем ресурса
DOI:10.1007/JHEP03(2018)140

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