Observation of Bs0 → Ds- π+ and Bs0 → Ds()-s ρ+ and Measurement of the Bs0 → Ds*- ρ+ Longitudinal Polarization Fraction

被引：19

作者：

Louvot, R. ^{[1
]}

Schneider, O. ^{[1
]}

Aushev, T. ^{[1
,13
]}

Arinstein, K. ^{[2
,33
]}

Bakich, A. M. ^{[39
]}

Balagura, V. ^{[13
]}

Barberio, E. ^{[23
]}

Bay, A. ^{[1
]}

Belous, K. ^{[12
]}

Bischofberger, M. ^{[25
]}

Bondar, A. ^{[2
,33
]}

Bozek, A. ^{[29
]}

Bracko, M. ^{[14
,21
]}

Browder, T. E. ^{[8
]}

Chang, P. ^{[28
]}

Chao, Y. ^{[28
]}

Chen, A. ^{[26
]}

Chen, K. -F. ^{[28
]}

Chen, P. ^{[28
]}

Cheon, B. G. ^{[7
]}

Chiang, C. -C. ^{[28
]}

Cho, I. -S. ^{[47
]}

Choi, Y. ^{[38
]}

Danilov, M. ^{[13
]}

Dash, M. ^{[46
]}

Drutskoy, A. ^{[4
]}

Eidelman, S. ^{[2
,33
]}

Goldenzweig, P. ^{[4
]}

Golob, B. ^{[14
,20
]}

Ha, H. ^{[18
]}

Haba, J. ^{[9
]}

Hara, T. ^{[9
]}

Horii, Y. ^{[42
]}

Hoshi, Y. ^{[41
]}

Hou, W. -S. ^{[28
]}

Hsiung, Y. B. ^{[28
]}

Hyun, H. J. ^{[19
]}

Iijima, T. ^{[24
]}

Inami, K. ^{[24
]}

Itoh, R. ^{[9
]}

Iwabuchi, M. ^{[47
]}

Iwasaki, M. ^{[43
]}

Iwasaki, Y. ^{[9
]}

Joshi, N. J. ^{[40
]}

Kah, D. H. ^{[19
]}

Kang, J. H. ^{[47
]}

Kapusta, P. ^{[29
]}

Katayama, N. ^{[9
]}

Kawasaki, T. ^{[31
]}

Kiesling, C. ^{[22
]}

机构：

[1] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[2] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[3] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic

[4] Univ Cincinnati, Cincinnati, OH 45221 USA

[5] Univ Giessen, Giessen, Germany

[6] Grad Univ Adv Studies, Hayama, Japan

[7] Hanyang Univ, Seoul 133791, South Korea

[8] Univ Hawaii, Honolulu, HI 96822 USA

[9] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan

[10] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

[11] Inst High Energy Phys, Vienna, Austria

[12] Inst High Energy Phys, Protvino, Russia

[13] Inst Theoret & Expt Phys, Moscow, Russia

[14] Jozef Stefan Inst, Ljubljana, Slovenia

[15] Kanagawa Univ, Yokohama, Kanagawa, Japan

[16] Karlsruher Inst Technol, Inst Expt Kernphys, Karlsruhe, Germany

[17] Korea Inst Sci & Technol Informat, Taejon, South Korea

[18] Korea Univ, Seoul, South Korea

[19] Kyungpook Natl Univ, Taegu 702701, South Korea

[20] Univ Ljubljana, Fac Math & Phys, Ljubljana, Slovenia

[21] Univ Maribor, SLO-2000 Maribor, Slovenia

[22] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[23] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

[24] Nagoya Univ, Nagoya, Aichi 4648601, Japan

[25] Nara Womens Univ, Nara 630, Japan

[26] Natl Cent Univ, Chungli 32054, Taiwan

[27] Natl United Univ, Miaoli, Taiwan

[28] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan

[29] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[30] Nippon Dent Univ, Niigata, Japan

[31] Niigata Univ, Niigata, Japan

[32] Univ Nova Gorica, Nova Gorica, Slovenia

[33] Novosibirsk State Univ, Novosibirsk 630090, Russia

[34] Osaka City Univ, Osaka 558, Japan

[35] Panjab Univ, Chandigarh 160014, India

[36] Univ Sci & Technol China, Hefei 230026, Peoples R China

[37] Seoul Natl Univ, Seoul, South Korea

[38] Sungkyunkwan Univ, Suwon, South Korea

[39] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

[40] Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India

[41] Tohoku Gakuin Univ, Tagajo, Miyagi, Japan

[42] Tohoku Univ, Sendai, Miyagi 980, Japan

[43] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[44] Tokyo Metropolitan Univ, Tokyo 158, Japan

[45] Tokyo Univ Agr & Technol, Tokyo, Japan

[46] Virginia Polytech Inst & State Univ, IPNAS, Blacksburg, VA 24061 USA

[47] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 23期

关键词：

NONLEPTONIC DECAYS; MESONS; QUARK;

D O I：

10.1103/PhysRevLett.104.231801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

First observations of the B-s(0) -> D-s*(-) pi(+), B-s(0) -> D-s(*)(-)s rho(+) and B-s(0) -> D-s*(-) rho(+) decays are reported together with measurements of their branching fractions. B(B-s(0) -> D-s*(-) pi(+)) = [2.4(-0.4)(+0.5)(stat) +/- 0.3(syst) +/- (0.4(f(s))] x 10(-3), B(B-s(0) -> D-s*(-) rho(+)) = [8.50(-1.2)(+1.3)(stat) +/- 1.1(syst) +/- 1.3(f(s))] x 10(-3) and B-s(0) -> D-s(*)(-)s rho(+) = [11.9(-2.0)(+2.2)(stat) +/- 1.7(syst) +/- 1.8(f(s)) x 10(-3) (f(s) = N-Bs(*)1 ((B) over bars(*)) / N b (b) over bar). From helicity- angle distributions, we measured the longitudinal polarization fraction in B-s(0) -> D-s(*)(-)s rho(+) decays to be f(L)(B-s(0) -> D-s(*)(-)s rho(+)) = 1.05(-0.10)(+0.08)(stat)(-0.04)(+0.03)(syst). These results are based on a 23.6 fb(-1) data sample collected at the Y(5S) resonance with the Belle detector at the KEKB e(+)e(-) collider.

引用

页数：6

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Observation of Bs0 → Ds*- π+ and Bs0 → Ds(*)-s ρ+ and Measurement of the Bs0 → Ds*- ρ+ Longitudinal Polarization Fraction

Observation of Bs0 → Ds- π+ and Bs0 → Ds()-s ρ+ and Measurement of the Bs0 → Ds*- ρ+ Longitudinal Polarization Fraction