在 Belle 实验中对 B0→ρ±π∓ 时间相关 CP 破坏的研究。
Study of B0-->rho+/- pi-/+ time-dependent CP violation at Belle.
作者信息
Wang C C, Abe K, Abe K, Abe T, Adachi I, Aihara H, Asano Y, Aushev T, Bakich A M, Ban Y, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder T E, Chang P, Chao Y, Chen K-F, Chen W T, Cheon B G, Choi S-K, Choi Y, Chuvikov A, Cole S, Dash M, Dong L Y, Dragic J, Drutskoy A, Eidelman S, Eiges V, Gershon T, Gokhroo G, Guo R, Haba J, Hastings N C, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou W-S, Hsiung Y B, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh K, Itoh R, Iwasaki H, Iwasaki Y, Kakuno H, Kang J H, Kang J S, Kapusta P, Katayama N, Kawasaki T, Khan H R, Kichimi H, Kim H J, Kinoshita K, Krizan P, Krokovny P, Kumar S, Kwon Y-J, Lange J S, Lee S E, Lee Y-J, Lesiak T, Li J, Limosani A, Lin S-W, Macnaughton J, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S L, Ostrowicz W, Ozaki H, Pakhlov P, Park C W, Parslow N, Peak L S, Piilonen L E, Ronga F J, Rozanska M, Sagawa H, Saitoh S, Sakai Y, Sato N, Schietinger T, Schneider O, Schümann J, Schwartz A J, Semenov S, Senyo K, Sevior M E, Shibuya H, Singh J B, Somov A, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S Y, Tajima O, Takasaki F, Tamai K, Tanaka M, Taylor G N, Teramoto Y, Tian X C, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Varvell K E, Villa S, Wang C H, Wang M-Z, Watanabe M, Yabsley B D, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Yusa Y, Zhang J, Zhang L M, Zhang Z P, Zhilich V, Ziegler T, Zontar D
机构信息
Department of Physics, National Taiwan University, Taipei.
出版信息
Phys Rev Lett. 2005 Apr 1;94(12):121801. doi: 10.1103/PhysRevLett.94.121801.
We present a time-dependent analysis of CP violation in B0-->rho(+/-)pi(-/+) decays based on a 140 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at KEKB. We obtain the charge asymmetry A(rhopi)(CP)=-0.16+/-0.10(stat)+/-0.02(syst). An unbinned maximum-likelihood fit to the Deltat distributions yields C(rhopi)=0.25+/-0.17(stat)+0.02-0.06(syst), DeltaC(rhopi)=0.38+/-0.18(stat)+0.02-0.04(syst), S(rhopi)=-0.28+/-0.23(stat)+0.10-0.08(syst), and DeltaS(rhopi)=-0.30+/-0.24(stat)+/-0.09(syst). The direct CP violation parameters for B-->rho(+)pi(-) and B-->rho(-)pi(+) decays are A(+-)(rhopi)=-0.02+/-0.16(stat)+0.05-0.02(syst) and A(-+)(rhopi)=-0.53+/-0.29(stat)+0.09-0.04(syst).
我们基于在KEKB使用Belle探测器于Upsilon(4S)共振处收集的140 fb(-1)数据样本，对B0→rho(+/-)pi(-/+)衰变中的CP破坏进行了时间相关分析。我们得到电荷不对称性A(rhopi)(CP)= -0.16±0.10(统计)±0.02(系统)。对Deltat分布进行无分箱最大似然拟合得到C(rhopi)=0.25±0.17(统计)+0.02 - 0.06(系统)，DeltaC(rhopi)=0.38±0.18(统计)+0.02 - 0.04(系统)，S(rhopi)= -0.28±0.23(统计)+0.10 - 0.08(系统)，以及DeltaS(rhopi)= -0.30±0.24(统计)±0.09(系统)。B→rho(+)pi(-)和B→rho(-)pi(+)衰变的直接CP破坏参数为A(+-)(rhopi)= -0.02±0.16(统计)+0.05 - 0.02(系统)和A(-+)(rhopi)= -0.53±0.29(统计)+0.09 - 0.04(系统)。
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