Measurement of B(0)(d)-B_(0)(d) mixing rate from the time evolution of dilepton events at the upsilon(4S)

Autor: K, Abe, I, Adachi, B S, Ahn, H, Aihara, M, Akatsu, G, Alimonti, K, Aoki, K, Asai, M, Asai, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, E, Banas, S, Behari, P K, Behera, D, Beiline, A, Bondar, A, Bozek, T E, Browder, B C, Casey, P, Chang, Y, Chao, B G, Cheon, S K, Choi, Y, Choi, Y, Doi, J, Dragic, S, Eidelman, Y, Enari, R, Enomoto, C W, Everton, F, Fang, H, Fujii, Y, Fujita, C, Fukunaga, M, Fukushima, A, Garmash, A, Gordon, K, Gotow, H, Guler, R, Guo, J, Haba, T, Haji, H, Hamasaki, K, Hanagaki, F, Handa, K, Hara, T, Hara, N C, Hastings, K, Hayashi, H, Hayashii, M, Hazumi, E M, Heenan, I, Higuchi, T, Higuchi, T, Hirai, H, Hirano, T, Hojo, Y, Hoshi, W S, Hou, S C, Hsu, H C, Huang, Y C, Huang, S, Ichizawa, Y, Igarashi, T, Iijima, H, Ikeda, K, Ikeda, K, Inami, Y, Inoue, A, Ishikawa, H, Ishino, R, Itoh, G, Iwai, H, Iwasaki, Y, Iwasaki, D J, Jackson, P, Jalocha, H K, Jang, M, Jones, R, Kagan, H, Kakuno, J, Kaneko, J H, Kang, J S, Kang, P, Kapusta, K, Kasami, N, Katayama, H, Kawai, M, Kawai, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, H, Kim, H J, Kim, S K, Kim, K, Kinoshita, S, Kobayashi, S, Koike, S, Koishi, H, Konishi, K, Korotushenko, P, Krokovny, R, Kulasiri, S, Kumar, T, Kuniya, E, Kurihara, A, Kuzmin, Y J, Kwon, M H, Lee, S H, Lee, C, Leonidopoulos, H B, Li, R S, Lu, Y, Makida, A, Manabe, D, Marlow, T, Matsubara, T, Matsuda, S, Matsui, S, Matsumoto, T, Matsumoto, K, Miyabayashi, H, Miyake, H, Miyata, L C, Moffitt, A, Mohapatra, G R, Moloney, G F, Moorhead, S, Mori, T, Mori, A, Murakami, T, Nagamine, Y, Nagasaka, Y, Nagashima, T, Nakadaira, E, Nakano, M, Nakao, H, Nakazawa, J W, Nam, S, Narita, Z, Natkaniec, K, Neichi, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, Y, Ohshima, T, Okabe, T, Okazaki, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, H, Palka, C S, Park, C W, Park, H, Park, L S, Peak, M, Peters, L E, Piilonen, E, Prebys, J, Raaf, J L, Rodriguez, N, Root, M, Rozanska, K, Rybicki, J, Ryuko, H, Sagawa, Y, Sakai, H, Sakamoto, H, Sakaue, M, Satapathy, N, Sato, A, Satpathy, S, Schrenk, S, Semenov, M E, Sevior, H, Shibuya, B, Shwartz, A, Sidorov, V, Sidorov, S, Stanic, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, J, Suzuki, K, Suzuki, S, Suzuki, S Y, Suzuki, S K, Swain, H, Tajima, T, Takahashi, F, Takasaki, M, Takita, K, Tamai, N, Tamura, J, Tanaka, M, Tanaka, Y, Tanaka, G N, Taylor, Y, Teramoto, M, Tomoto, T, Tomura, S N, Tovey, K, Trabelsi, T, Tsuboyama, Y, Tsujita, T, Tsukamoto, S, Uehara, K, Ueno, N, Ujiie, Y, Unno, S, Uno, Y, Ushiroda, Y, Usov, S E, Vahsen, G, Varner, K E, Varvell, C C, Wang, C H, Wang, M Z, Wang, T J, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, M, Yamaga, A, Yamaguchi, H, Yamaguchi, H, Yamaoka, Y, Yamaoka, Y, Yamashita, M, Yamauchi, S, Yanaka, M, Yokoyama, K, Yoshida, Y, Yusa, H, Yuta, C C, Zhang, H W, Zhao, Y, Zheng, V, Zhilich, D, Zontar
Rok vydání: 2000
Zdroj: Physical review letters. 86(15)
ISSN: 0031-9007
Popis: We report a determination of the B(0)(d)-B_(0)(d) mixing parameter Deltam(d) based on the time evolution of dilepton yields in Upsilon(4S) decays. The measurement is based on a 5.9 fb(-1) data sample collected by the Belle detector at KEKB. The proper-time difference distributions for same-sign and opposite-sign dilepton events are simultaneously fitted to an expression containing Deltam(d) as a free parameter. Using both muons and electrons, we obtain Deltam(d) = 0.463+/-0.008 (stat)+/-0.016 (syst) ps(-1). This is the first determination of Deltam(d) from time evolution measurements at the Upsilon(4S). We also place limits on possible CPT violations.
Databáze: OpenAIRE