Details

Autor(en) / Beteiligte

• Adachi, I
• Aihara, H
• Al Said, S
• Asner, D M
• Atmacan, H
• Aulchenko, V
• Ayad, R
• Bahinipati, S
• Bessner, M
• Bhuyan, B
• Bobrov, A
• Bozek, A
• Chen, A
• Cheon, B G
• Chilikin, K
• Cho, K
• Choi, S-K
• Choi, Y
• Cunliffe, S
• Czank, T
• De Pietro, G
• Dhamija, R
• Ferber, T
• Fulsom, B G
• Garg, R
• Giri, A
• Goldenzweig, P
• Graziani, E
• Guan, Y
• Hayasaka, K
• Higuchi, T
• Iijima, T
• Inami, K
• Iwasaki, M
• Iwasaki, Y
• Jacobs, W W
• Jin, Y
• Kaliyar, A B
• Kim, C H
• Kim, K-H
• Korobov, A
• Korpar, S
• Križan, P
• Krokovny, P
• Laurenza, M
• Lee, S C
• Li, L K
• Libby, J
• Lieret, K
• Martini, A
• Meier, F
• Merola, M
• Metzner, F
• Mizuk, R
• Mohanty, G B
• Moon, T J
• Mrvar, M
• Mussa, R
• Nayak, L
• Ogawa, S
• Pakhlova, G
• Pang, T
• Park, S-H
• Patra, S
• Paul, S
• Pedlar, T K
• Podobnik, T
• Prim, M T
• Russo, G
• Sahoo, D
• Sakai, Y
• Sangal, A
• Santelj, L
• Sanuki, T
• Schwanda, C
• Seino, Y
• Senyo, K
• Sharma, C
• Shen, C P
• Shiu, J-G
• Solovieva, E
• Strube, J F
• Sumisawa, K
• Tamponi, U
• Tanida, K
• Trabelsi, K
• Uglov, T
• Uno, K
• Uno, S
• van Tonder, R
• Varvell, K E
• Waheed, E
• Wang, C H
• Wang, X L
• Won, E
• Yabsley, B D
• Yan, W
• Zhai, Y
• Zhilich, V
• Zhukova, V

Titel

First Measurement of the B^{+}→π^{+}π^{0}π^{0} Branching Fraction and CP Asymmetry

Ist Teil von

• Physical review letters, 2023-05, Vol.130 (18), p.181804-181804

Ort / Verlag

United States

Erscheinungsjahr

2023

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We study B^{+}→π^{+}π^{0}π^{0} using 711  fb^{-1} of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. 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)^{+}π^{0} branching fraction of (11.2±1.1±0.9_{-1.6}^{+0.8})×10^{-6}, where the third uncertainty is due to possible interference with B^{+}→ρ(1450)^{+}π^{0}. We present the first observation of a structure around 1  GeV/c^{2} in the π^{0}π^{0} 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.