Details

Autor(en) / Beteiligte

• Garg, R.
• Bhardwaj, V.
• Singh, J. B.
• Adachi, I.
• Al Said, S.
• Asner, D. M.
• Aushev, T.
• Babu, V.
• Bilka, T.
• Biswal, J.
• Bobrov, A.
• Bračko, M.
• Cao, L.
• Chen, A.
• Cheon, B. G.
• Choi, S.-K.
• Choi, Y.
• Cunliffe, S.
• Dash, N.
• Fast, J. E.
• Gaur, V.
• Gabyshev, N.
• Garmash, A.
• Giri, A.
• Grzymkowska, O.
• Hsu, C.-L.
• Ishikawa, A.
• Iwasaki, M.
• Jacobs, W. W.
• Jeon, H. B.
• Jia, S.
• Jin, Y.
• Joffe, D.
• Joo, K. K.
• Julius, T.
• Kaliyar, A. B.
• Kawasaki, T.
• Kim, D. Y.
• Kim, S. H.
• Korpar, S.
• Križan, P.
• Kroeger, R.
• Kumar, R.
• Lange, J. S.
• Lee, J. K.
• Lee, S. C.
• Li, C. H.
• Li, L. K.
• Li, Y. B.
• Libby, J.
• Lu, P.-C.
• MacNaughton, J.
• Masuda, M.
• Matsuda, T.
• Matvienko, D.
• Merola, M.
• Mizuk, R.
• Mohanty, G. B.
• Mussa, R.
• Nath, K. J.
• Ono, H.
• Onuki, Y.
• Pakhlov, P.
• Pakhlova, G.
• Pal, B.
• Pardi, S.
• Patra, S.
• Paul, S.
• Pestotnik, R.
• Piilonen, L. E.
• Prasanth, K.
• Prencipe, E.
• Rostomyan, A.
• Russo, G.
• Sakai, Y.
• Sandilya, S.
• Schneider, O.
• Schnell, G.
• Schueler, J.
• Schwanda, C.
• Seino, Y.
• Senyo, K.
• Shibata, T.-A.
• Shiu, J.-G.
• Sokolov, A.
• Stottler, Z. S.
• Sumiyoshi, T.
• Tenchini, F.
• Trabelsi, K.
• Uchida, M.
• Unno, Y.
• Uno, S.
• Varner, G.
• Wang, B.
• Wang, P.
• Wang, X. L.
• Won, E.
• Yang, S. B.
• Ye, H.
• Zhang, Z. P.

Titel

Search for the B → Y ( 4260 ) K , Y ( 4260 ) → J / ψ π + π − decays

Ist Teil von

• Physical review. D, 2019-04, Vol.99 (7), Article 071102

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We report the results of a search for the B → Y ( 4260 ) K , Y ( 4260 ) → J / ψπ+π- decays. This study is based on a data sample corresponding to an integrated luminosity of 711 fb-1 , collected at the Υ ( 4S ) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We investigate the J / ψπ+π- invariant mass distribution in the range 4.0 to 4.6 GeV/c2 using both B+ → J / ψπ+π-K+ and B0 → J / ψπ+π-KS0 decays. We find excesses of events above the background levels, with significances of 2.1 and 0.9 standard deviations for charged and neutral B → Y ( 4260 ) K decays, respectively, taking into account the systematic uncertainties. These correspond to upper limits on the product of branching fractions, B ( B+ → Y ( 4260 ) K+ ) × B ( Y ( 4260 ) → J / ψπ+π- ) <1.4×10-5 and B ( B0 → Y ( 4260 ) K0 ) × B ( Y ( 4260 ) → J / ψπ+π- ) <1.7×10-5 at the 90% confidence level.