利用K介子长寿命衰变确定卡比博-小林-益川参数|Vus|
A determination of the Cabibbo-Kobayashi-Maskawa parameter |V us| using KL decays.
作者信息
Alexopoulos T, Arenton M, Barbosa R F, Barker A R, Bellantoni L, Bellavance A, Blucher E, Bock G J, Cheu E, Childress S, Coleman R, Corcoran M D, Cox B, Erwin A R, Ford R, Glazov A, Golossanov A, Graham J, Hamm J, Hanagaki K, Hsiung Y B, Huang H, Jejer V, Jensen D A, Kessler R, Kobrak H G E, Kotera K, LaDue J, Ledovskoy A, McBride P L, Monnier E, Nelson K S, Nguyen H, Niclasen R, Prasad V, Qi X R, Ramberg E J, Ray R E, Ronquest M, Santos E, Shanahan P, Shields J, Slater W, Smith D, Solomey N, Swallow E C, Toale P A, Tschirhart R, Wah Y W, Wang J, White H B, Whitmore J, Wilking M, Winstein B, Winston R, Worcester E T, Yamanaka T, Zimmerman E D
机构信息
University of Wisconsin, Madison, WI 53706, USA.
出版信息
Phys Rev Lett. 2004 Oct 29;93(18):181802. doi: 10.1103/PhysRevLett.93.181802. Epub 2004 Oct 25.
We present a determination of the Cabibbo-Kobayashi-Maskawa parameter |V(us)| based on new measurements of the six largest K(L) branching fractions and semileptonic form factors by the KTeV (E832) experiment at Fermilab. We find |V(us)|=0.2252+/-0.0008(KTeV)+/-0.0021(ext), where the errors are from KTeV measurements and from external sources. We also use the measured branching fractions to determine the CP violation parameter |eta(+-)|=(2.228+/-0.005(KTeV)+/-0.009(ext))x10(-3).
我们基于费米实验室的KTeV（E832）实验对六个最大的K（L）分支比和半轻子形状因子的新测量结果，给出了卡比博-小林-益川参数|V（us）|的测定值。我们发现|V（us）| = 0.2252±0.0008（KTeV）±0.0021（外部），其中误差来自KTeV测量和外部来源。我们还利用测量的分支比来确定CP破坏参数|η（±）| =（2.228±0.005（KTeV）±0.009（外部））×10^（-3）。
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