Improved evidence for direct CP violation in B0-->pi+pi- decays and model-independent constraints on phi2.
Improved evidence for direct CP violation in B0-->pi+pi- decays and model-independent constraints on phi2.
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DOI：
10.1103/physrevlett.95.101801
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发表时间：
2005-02
影响因子：
8.6
通讯作者：
K. Abe;I. Adachi;H. Aihara;K. Arinstein;Y. Asano;T. Aushev;A. Bakich;Y. Ban;E. Barberio;M. Barbero;A. Bay;U. Bitenc;I. Bizjak;S. Blyth;A. Bondar;A. Bozek;M. Bračko;J. Brodzicka;T. Browder;P. Chang;Y. Chao;A. Chen;K.F. Chen;W. Chen;B. Cheon;R. Chistov;S. Choi;Y. Choi;Y. Choi;A. Chuvikov;S. Cole;J. Dalseno;M. Dash;L. Dong;A. Drutskoy;S. Eidelman;Y. Enari;F. Fang;S. Fratina;N. Gabyshev;A. Garmash;T. Gershon;G. Gokhroo;B. Golob;A. Gorišek;J. Haba;K. Hara;T. Hara;N. Hastings;H. Hayashii;M. Hazumi;L. Hinz;T. Hokuue;Y. Hoshi;S. Hou;W. Hou;Y. Hsiung;T. Iijima;A. Imoto;K. Inami;A. Ishikawa;H. Ishino;R. Itoh;M. Iwasaki;Y. Iwasaki;H. Kakuno;J. Kang;J. Kang;P. Kapusta;N. Katayama;H. Kawai;T. Kawasaki;H. Khan;A. Kibayashi;H. Kichimi;S. Kim;K. Kinoshita;S. Korpar;P. Križan;P. Krokovny;S. Kumar;C. Kuo;A. Kusaka;A. Kuzmin;Y. Kwon;G. Leder;S. Lee;T. Lesiak;J. Li;S. Lin;J. Macnaughton;G. Majumder;F. Mandl;D. Marlow;A. Matyja;Y. Mikami;W. Mitaroff;K. Miyabayashi;H. Miyake;H. Miyata;R. Mizuk;D. Mohapatra;A. Murakami;T. Nagamine;Y. Nagasaka;I. Nakamura;E. Nakano;M. Nakao;H. Nakazawa;Z. Natkaniec;S. Nishida;O. Nitoh;S. Noguchi;T. Nozaki;S. Ogawa;T. Ohshima;T. Okabe;S. Okuno;S. Olsen;Y. Onuki;W. Ostrowicz;H. Ozaki;P. Pakhlov;H. Palka;H. Park;N. Parslow;L. Peak;R. Pestotnik;L. Piilonen;F. Ronga;M. Różańska;H. Sagawa;Y. Sakai;N. Sato;T. Schietinger;O. Schneider;P. Schönmeier;J. Schümann;A. Schwartz;K. Senyo;M. Sevior;H. Shibuya;B. Shwartz;V. Sidorov;J. Singh;A. Somov;N. Soni;R. Stamen;S. Stanič;M. Starič;K. Sumisawa;T. Sumiyoshi;S. Suzuki;S. Suzuki;O. Tajima;F. Takasaki;K. Tamai;N. Tamura;M. Tanaka;Y. Teramoto;X. Tian;K. Trabelsi;T. Tsuboyama;T. Tsukamoto;S. Uehara;T. Uglov;K. Ueno;Y. Unno;S. Uno;P. Urquijo;Y. Ushiroda;G. Varner;K. Varvell;S. Villa;C. Wang;C. H. Wang;M. Wang;Y. Watanabe;Q. Xie;B. Yabsley;A. Yamaguchi;Y. Yamashita;M. Yamauchi;H. Yang;J. Zhang;L. Zhang;Z. Zhang;V. Zhilich;D. Žontar;D. Zürcher
中科院分区：
文献类型：
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作者：
K. Abe;I. Adachi;H. Aihara;K. Arinstein;Y. Asano;T. Aushev;A. Bakich;Y. Ban;E. Barberio;M. Barbero;A. Bay;U. Bitenc;I. Bizjak;S. Blyth;A. Bondar;A. Bozek;M. Bračko;J. Brodzicka;T. Browder;P. Chang;Y. Chao;A. Chen;K.F. Chen;W. Chen;B. Cheon;R. Chistov;S. Choi;Y. Choi;Y. Choi;A. Chuvikov;S. Cole;J. Dalseno;M. Dash;L. Dong;A. Drutskoy;S. Eidelman;Y. Enari;F. Fang;S. Fratina;N. Gabyshev;A. Garmash;T. Gershon;G. Gokhroo;B. Golob;A. Gorišek;J. Haba;K. Hara;T. Hara;N. Hastings;H. Hayashii;M. Hazumi;L. Hinz;T. Hokuue;Y. Hoshi;S. Hou;W. Hou;Y. Hsiung;T. Iijima;A. Imoto;K. Inami;A. Ishikawa;H. Ishino;R. Itoh;M. Iwasaki;Y. Iwasaki;H. Kakuno;J. Kang;J. Kang;P. Kapusta;N. Katayama;H. Kawai;T. Kawasaki;H. Khan;A. Kibayashi;H. Kichimi;S. Kim;K. Kinoshita;S. Korpar;P. Križan;P. Krokovny;S. Kumar;C. Kuo;A. Kusaka;A. Kuzmin;Y. Kwon;G. Leder;S. Lee;T. Lesiak;J. Li;S. Lin;J. Macnaughton;G. Majumder;F. Mandl;D. Marlow;A. Matyja;Y. Mikami;W. Mitaroff;K. Miyabayashi;H. Miyake;H. Miyata;R. Mizuk;D. Mohapatra;A. Murakami;T. Nagamine;Y. Nagasaka;I. Nakamura;E. Nakano;M. Nakao;H. Nakazawa;Z. Natkaniec;S. Nishida;O. Nitoh;S. Noguchi;T. Nozaki;S. Ogawa;T. Ohshima;T. Okabe;S. Okuno;S. Olsen;Y. Onuki;W. Ostrowicz;H. Ozaki;P. Pakhlov;H. Palka;H. Park;N. Parslow;L. Peak;R. Pestotnik;L. Piilonen;F. Ronga;M. Różańska;H. Sagawa;Y. Sakai;N. Sato;T. Schietinger;O. Schneider;P. Schönmeier;J. Schümann;A. Schwartz;K. Senyo;M. Sevior;H. Shibuya;B. Shwartz;V. Sidorov;J. Singh;A. Somov;N. Soni;R. Stamen;S. Stanič;M. Starič;K. Sumisawa;T. Sumiyoshi;S. Suzuki;S. Suzuki;O. Tajima;F. Takasaki;K. Tamai;N. Tamura;M. Tanaka;Y. Teramoto;X. Tian;K. Trabelsi;T. Tsuboyama;T. Tsukamoto;S. Uehara;T. Uglov;K. Ueno;Y. Unno;S. Uno;P. Urquijo;Y. Ushiroda;G. Varner;K. Varvell;S. Villa;C. Wang;C. H. Wang;M. Wang;Y. Watanabe;Q. Xie;B. Yabsley;A. Yamaguchi;Y. Yamashita;M. Yamauchi;H. Yang;J. Zhang;L. Zhang;Z. Zhang;V. Zhilich;D. Žontar;D. Zürcher
我们提出了一种新的测量B(0)- > pi(+)pi（-）衰变中随时间变化的cp违反参数的方法，该方法使用KEKB非对称能量e(+)e（-）对撞机上的Belle探测器收集275 x 10(6)对BB对，这些BB对在Gamma（4S）共振下运行。我们发现了666 +/- 43个B(0)—> pi(+)pi（-）事件，并测量了违反cp的参数：S(pipi) = -0.67 +/- 0.16(stat) +/- 0.06（syst）和A(pipi) = +0.56 +/- 0.12(stat) +/- 0.06（syst）。我们发现任何S（pipi）值的显著性大于4个标准差的大的直接CP违逆的证据。利用同位旋关系，我们得到了Cabibbo-Kobayashi-Maskawa夸克混合矩阵角φ(2)为0°< phv(2) < 19°和71°< φ(2) < 180°的95.4%置信区间。
We present a new measurement of the time-dependent CP-violating parameters in B(0)--> pi(+)pi(-) decays with 275 x 10(6) BB pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider operating at the Gamma(4S) resonance. We find 666 +/- 43 B(0) --> pi(+)pi(-) events and measure the CP-violating parameters: S(pipi) = -0.67 +/- 0.16(stat) +/- 0.06(syst) and A(pipi) = +0.56 +/- 0.12(stat) +/- 0.06(syst). We find evidence for large direct CP violation with a significance greater than 4 standard deviations for any S(pipi) value. Using isospin relations, we obtain 95.4% confidence intervals for the Cabibbo-Kobayashi-Maskawa quark-mixing matrix angle phi(2) of 0 degree < phiv(2) < 19 degrees and 71 degrees < phi(2) < 180 degrees.