分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-09-17
摘要： Large Nc relations among baryonic Isgur-Wise functions appearing at the order of 1/mQ areanalyzed. An application to b → c weak decays is given.
分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-09-17
摘要： LHCb collaboration has recently announced a measurement of the difference of time-integrated CP asymmetries between D → K+K− and D → #25;+#25;−. This result provides the evidence of large direct CP violation in D meson and reveals some important implications on underlying new physics. It is shown that the direct CP violation in D meson can be enhanced by R-parityviolating supersymmetry, while CP violations in K and B mesons are suppressed by this newphysics, which is in consistence with previous experiments. Constraints on the model parametersand some consequences are also discussed.
分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-09-17
摘要： b → c semi-leptonic decays are studied in details. Relevant helicity amplitudes are written down. Both unpolarized and polarized b cases are considered. Decay angular distributions,asymmetry parameters and semileptonic decay rates are calculated, with numerical results usingleading order results of the large Nc heavy quark effective theory.
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