Details

Autor(en) / Beteiligte

• Aihara, H.
• Atmacan, H.
• Aushev, T.
• Ayad, R.
• Babu, V.
• Bahinipati, S.
• Behera, P.
• Bessner, M.
• Bhuyan, B.
• Bilka, T.
• Borah, J.
• Bozek, A.
• Bračko, M.
• Branchini, P.
• Budano, A.
• Chekelian, V.
• Cheon, B.  G.
• Choi, Y.
• Czank, T.
• Das, S.
• De Nardo, G.
• De Pietro, G.
• Di Capua, F.
• Doležal, Z.
• Dong, T.  V.
• Ferber, T.
• Garg, R.
• Gaur, V.
• Gabyshev, N.
• Giri, A.
• Goldenzweig, P.
• Graziani, E.
• Gu, T.
• Gudkova, K.
• Halder, S.
• Hayashii, H.
• Iwasaki, M.
• Jacobs, W.  W.
• Jia, S.
• Kaliyar, A.  B.
• Kim, C.  H.
• Kinoshita, K.
• Kodyš, P.
• Kovalenko, E.
• Križan, P.
• Krokovny, P.
• Kumar, M.
• Kumara, K.
• Lam, T.
• Laurenza, M.
• Levit, D.
• Lieret, K.
• Masuda, M.
• Mizuk, R.
• Mohanty, G.  B.
• Mrvar, M.
• Nayak, L.
• Nisar, N.  K.
• Nishida, S.
• Ogawa, S.
• Pakhlova, G.
• Pardi, S.
• Park, S. -H.
• Passeri, A.
• Pedlar, T.  K.
• Pestotnik, R.
• Piilonen, L.  E.
• Podobnik, T.
• Rostomyan, A.
• Rout, N.
• Russo, G.
• Sakai, Y.
• Sandilya, S.
• Sangal, A.
• Santelj, L.
• Savinov, V.
• Seino, Y.
• Shen, C.  P.
• Shiu, J. -G.
• Sokolov, A.
• Solovieva, E.
• Sumihama, M.
• Sumisawa, K.
• Sutcliffe, W.
• Tanida, K.
• Tenchini, F.
• Uglov, T.
• Unno, Y.
• Uno, K.
• Uno, S.
• Urquijo, P.
• van Tonder, R.
• Vinokurova, A.
• Waheed, E.
• Wang, C.  H.
• Wang, X.  L.
• Yabsley, B.  D.
• Yang, S.  B.
• Zhilich, V.
• Zhukova, V.

Titel

First Measurement of the B+→π+π0π0 Branching Fraction and CP Asymmetry

Ist Teil von

• Physical review letters, 2023-05, Vol.130 (18)

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2023

Quelle

American Physical Society

Beschreibungen/Notizen

• We study B+ → π+π0π0 using 711 fb-1 of data collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Here we measure an inclusive branching fraction of (19.0 ±1.5 ±1.4)×10-6 and an inclusive CP asymmetry of (9.2 ±6.8 ±0.7)%, where the first uncertainties are statistical and the second are systematic, and a B+ → ρ(770)+π0 branching fraction of (11.2 ± 1.1 ± 0.9 $^{+0.8}_{-1.6}$)× 10-6, where the third uncertainty is due to possible interference with B+ → ρ(1450)+π0. We present the first observation of a structure around 1 GeV/c2 in the π0π0 mass spectrum, with a significance of 6.4σ, and measure a branching fraction to be (6.9 ±0.9 ±0.6) × 10-6. We also report a measurement of local CP asymmetry in this structure.