Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Evidence for Isospin Violation and Measurement of CP Asymmetries in B →k∗ (892)γ. / Belle Collaboration.
в: Physical Review Letters, Том 119, № 19, 191802, 07.11.2017.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Evidence for Isospin Violation and Measurement of CP Asymmetries in B →k∗ (892)γ
AU - The BELLE collaboration
AU - Horiguchi, T.
AU - Ishikawa, A.
AU - Yamamoto, H.
AU - Adachi, I.
AU - Aihara, H.
AU - Al Said, S.
AU - Asner, D. M.
AU - Aulchenko, V.
AU - Aushev, T.
AU - Ayad, R.
AU - Babu, V.
AU - Badhrees, I.
AU - Bakich, A. M.
AU - Bansal, V.
AU - Behera, P.
AU - Bhardwaj, V.
AU - Bhuyan, B.
AU - Biswal, J.
AU - Bobrov, A.
AU - Bonvicini, G.
AU - Bozek, A.
AU - Bračko, M.
AU - Browder, T. E.
AU - Červenkov, D.
AU - Chekelian, V.
AU - Chen, A.
AU - Cheon, B. G.
AU - Chilikin, K.
AU - Cho, K.
AU - Choi, Y.
AU - Cinabro, D.
AU - Czank, T.
AU - Dash, N.
AU - Di Carlo, S.
AU - DoleŽal, Z.
AU - Drásal, Z.
AU - Dutta, D.
AU - Eidelman, S.
AU - Epifanov, D.
AU - Gabyshev, N.
AU - Garmash, A.
AU - Krokovny, P.
AU - Kuzmin, A.
AU - Matvienko, D.
AU - Shebalin, V.
AU - Usov, Y.
AU - Vinokurova, A.
AU - Vorobyev, V.
AU - Zhilich, V.
AU - Zhulanov, V.
N1 - Publisher Copyright: © 2017 American Physical Society.
PY - 2017/11/7
Y1 - 2017/11/7
N2 - We report the first evidence for isospin violation in B→K∗γ and the first measurement of the difference of CP asymmetries between B+→K∗+γ and B0→K∗0γ. This analysis is based on the data sample containing 772×106BB pairs that was collected with the Belle detector at the KEKB energy-asymmetric e+e- collider. We find evidence for the isospin violation with a significance of 3.1σ, Δ0+=[+6.2±1.5(stat)±0.6(syst)±1.2(f+-/f00)]%, where the third uncertainty is due to the uncertainty on the fraction of B+B- to B0B0 production in (4S) decays. The measured value is consistent with predictions of the standard model. The result for the difference of CP asymmetries is ΔACP=[+2.4±2.8(stat)±0.5(syst)]%, consistent with zero. The measured branching fractions and CP asymmetries for charged and neutral B meson decays are the most precise to date. We also calculate the ratio of branching fractions of B0→K∗0γ to Bs0→φγ.
AB - We report the first evidence for isospin violation in B→K∗γ and the first measurement of the difference of CP asymmetries between B+→K∗+γ and B0→K∗0γ. This analysis is based on the data sample containing 772×106BB pairs that was collected with the Belle detector at the KEKB energy-asymmetric e+e- collider. We find evidence for the isospin violation with a significance of 3.1σ, Δ0+=[+6.2±1.5(stat)±0.6(syst)±1.2(f+-/f00)]%, where the third uncertainty is due to the uncertainty on the fraction of B+B- to B0B0 production in (4S) decays. The measured value is consistent with predictions of the standard model. The result for the difference of CP asymmetries is ΔACP=[+2.4±2.8(stat)±0.5(syst)]%, consistent with zero. The measured branching fractions and CP asymmetries for charged and neutral B meson decays are the most precise to date. We also calculate the ratio of branching fractions of B0→K∗0γ to Bs0→φγ.
KW - K-ASTERISK-GAMMA
KW - TO-LEADING ORDER
KW - DECAYS
KW - ANNIHILATION
KW - SYMMETRY
KW - BREAKING
UR - http://www.scopus.com/inward/record.url?scp=85034018409&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.119.191802
DO - 10.1103/PhysRevLett.119.191802
M3 - Article
AN - SCOPUS:85034018409
VL - 119
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 19
M1 - 191802
ER -
ID: 9872012