Measurements of isospin asymmetry and difference of direct CP asymmetries in inclusive B -> X-s gamma decays

  • Watanuki, S.
  • Ishikawa, A.
  • Adachi, I
  • Aihara, H.
  • Al Said, S.
  • ... Won, E.
  • 외 171명
Citations

WEB OF SCIENCE

17
Citations

SCOPUS

24

초록

We report measurements of isospin asymmetry Delta(0-) and difference of direct CP asymmetries Delta A(CP) between charged and neutral B -> X-s gamma decays. This analysis is based on the data sample containing 772 x 10(6)B (B) over bar pairs that was collected with the Belle detector at the KEKB energy-asymmetric ethornecollider. Using a sum-of-exclusive technique with invariant X-s mass up to 2.8 GeV= c2, we obtain Delta(0-) = [0.48 +/- 1.49(stat) +/- 0.97(syst) +/- 1.15(f(+-)/f(00))]% and Delta A(CP) = [+3.69 +/- 2.65(stat) +/- 0.76(syst)]%, where the last uncertainty for.0-is due to the uncertainty on the production ratio of B+B- to B-0(B) over bar (0) in.o4Sthorn decays. The measured value of Delta(0-) is consistent with zero, allowing us to constrain the resolved photon contribution in the B -> X-s gamma, and improve the branching fraction prediction. The result for Delta A(CP) is consistent with the prediction of the SM. We also measure the direct CP asymmetries for charged and neutral B -> X-s gamma decays. All the measurements are the most precise to date.

키워드

VIOLATIONANNIHILATIONMESON
제목
Measurements of isospin asymmetry and difference of direct CP asymmetries in inclusive B -> X-s gamma decays
저자
Watanuki, S.Ishikawa, A.Adachi, IAihara, H.Al Said, S.Asner, D. M.Aushev, T.Ayad, R.Babu, VBadhrees, IBakich, A. M.Bansal, VBehera, P.Beleno, C.Berger, M.Bhardwaj, VBhuyan, B.Bilka, T.Biswal, J.Bobrov, A.Bonvicini, G.Bozek, A.Bracko, M.Browder, T. E.Cao, L.Cervenkov, D.Chang, P.Cheon, B. G.Chilikin, K.Cho, K.Choi, Y.Choudhury, S.Cinabro, D.Cunliffe, S.Di Carlo, S.Dingfelder, J.Dong, T., VEidelman, S.Epifanov, D.Fast, J. E.Ferber, T.Frey, A.Fulsom, B. G.Gaur, VGabyshev, N.Garmash, A.Gelb, M.Giri, A.Goldenzweig, P.Guan, Y.Guido, E.Haba, J.Hayasaka, K.Hayashii, H.Hou, W-SIijima, T.Inami, K.Inguglia, G.Itoh, R.Iwasaki, M.Iwasaki, Y.Jacobs, W. W.Jaegle, IJeon, H. B.Jia, S.Jin, Y.Joo, K. K.Julius, T.Karyan, G.Kawasaki, T.Kiesling, C.Kim, D. Y.Kim, J. B.Kim, S. H.Kinoshita, K.Kodys, P.Korpar, S.Kotchetkov, D.Krizan, P.Kroeger, R.Krokovny, P.Kuhr, T.Kumar, R.Kuzmin, A.Kwon, Y-JLee, I. S.Lee, S. C.Li, L. K.Li, Y. B.Li Gioi, L.Libby, J.Liventsev, D.Lubej, M.Luo, T.Masuda, M.Matsuda, T.Merola, M.Miyabayashi, K.Miyata, H.Mizuk, R.Mohanty, G. B.Mori, T.Nakao, M.Nanut, T.Nath, K. J.Niiyama, M.Nishida, S.Nishimura, K.Ogawa, K.Ogawa, S.Okuno, S.Ono, H.Ostrowicz, W.Pakhlov, P.Pakhlova, G.Pal, B.Park, H.Paul, S.Pedlar, T. K.Pestotnik, R.Piilonen, L. E.Prencipe, E.Ritter, M.Rostomyan, A.Russo, G.Sakai, Y.Sandilya, S.Santelj, L.Savinov, VSchneider, O.Schnell, G.Schueler, J.Schwanda, C.Schwartz, A. J.Seino, Y.Senyo, K.Seon, O.Shebalin, VShibata, T-AShiu, J-GShwartz, B.Sokolov, A.Solovieva, E.Stanic, S.Staric, M.Sumiyoshi, T.Sutcliffe, W.Takizawa, M.Tanida, K.Taniguchi, N.Tenchini, F.Uchida, M.Uglov, T.Unno, Y.Uno, S.Vahsen, S. E.Van Hulse, C.Van Tonder, R.Varner, G.Varvell, K. E.Vossen, A.Wang, B.Wang, C. H.Wang, M-ZWang, P.Watanabe, M.Widmann, E.Won, E.Ye, H.Yin, J. H.Yusa, Y.Zakharov, S.Zhang, Z. P.Zhilich, VZhukova, VZhulanov, VZupanc, A.
DOI
10.1103/PhysRevD.99.032012
발행일
2019-02-20
유형
Article
저널명
Physical Review D
99
3