Invariant-mass and fractional-energy dependence of inclusive production of dihadrons in e +
annihilation at √s = 10.58 GeV
The inclusive cross sections for dihadrons of charged pions and kaons (e+e− → hhX) in electron-positron annihilation are reported. They are obtained as a function of the total fractional energy and invariant mass for any di-hadron combination in the same hemisphere as defined by the thrust event-shape variable and its axis. Since same-hemisphere dihadrons can be assumed to originate predominantly from the same initial parton, di-hadron fragmentation functions are probed. These di-hadron fragmentation functions are needed as an unpolarized baseline in order to quantitatively understand related spin-dependent measurements in other processes and to apply them to the extraction of quark transversity distribution functions in the nucleon. The di-hadron cross sections are obtained from a 655 fb−1 data sample collected at or near the ϒð4SÞ resonance with the Belle detector at the KEKB asymmetric-energy eþe− collider.
Seidl, R; Adachi, I; Aihara, H; Al Said, S; Asner, DM; Aushev, T; Ayad, R; Badhrees, I; Bakich, AM; Bansal, V; Behera, P; Bhardwaj, V; Bhuyan, B; Biswal, J; Bobrov, A; Bozek, A; Bračko, M; Browder, TE; Červenkov, D; Chekelian, V; Chen, A; Cheon, BG; Chilikin, K; Cho, K; Choi, SK; Choi, Y; Cinabro, D; Dash, N; Di Carlo, S; Doležal, Z; Drásal, Z; Eidelman, S; Farhat, H; Fast, JE; Ferber, T; Fulsom, BG; Gaur, V; Gabyshev, N; Garmash, A; Gillard, R; Goldenzweig, P; Guido, E; Haba, J; Hayasaka, K; Hayashii, H; Hou, WS; Iijima, T; Inami, K; Ishikawa, A; Itoh, R; Iwasaki, Y; Jacobs, WW; Jaegle, I; Jeon, HB; Jia, S; Jin, Y; Joffe, D; Joo, KK; Julius, T; Kang, KH; Karyan, G; Kim, DY; Kim, JB; Kim, KT; Kim, MJ; Kim, SH; Kim, YJ; Kinoshita, K; Kodyš, P; Korpar, S; Kotchetkov, D; Križan, P; Krokovny, P; Kulasiri, R; Kumita, T; Kuzmin, A; Kwon, YJ; Lange, JS; Li, L; Li Gioi, L; Libby, J; Liventsev, D; Lubej, M; Luo, T; Masuda, M; Matsuda, T; Matvienko, D; Merola, M; Miyabayashi, K; Miyata, H; Mizuk, R; Moon, HK; Mori, T; Mussa, R; Nakano, E; Nakao, M; Nanut, T; Nath, KJ; Natkaniec, Z; Niiyama, M
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