Delta Gamma_d：标准模型的一个被遗忘的检验
Delta Gamma_d: A Forgotten Null Test of the Standard Model
摘要：
最近的测量异常的喜欢的符号dimuon不对称的D0合作，促使理论上的猜测可能的物理来源超出标准模型，可能会影响寿命和寿命的差异，在中性B介子系统。值得密切关注的一个观测值是B_d系统中的宽度差Δ Gamma_d。由于标准模型对这个量的预测远低于1%，因此它可以作为一个“零检验”，通过测量更大的值可以清楚地揭示新物理的存在。本文综述了当前和未来实验中测量Delta Gamma_d的方法，并提出了一种新的测量方法。
英文摘要：
The recent measurement of an anomalous like-sign dimuon asymmetry by the D0 collaboration has prompted theoretical speculation on possible sources of physics beyond the Standard Model that may affect lifetimes and lifetime differences in neutral B meson systems. One observable that deserves closer attention is the width difference in the B_d system, Delta Gamma_d. Since the Standard Model prediction for this quantity is well below 1%, it serves as a "null test" whereby the measurement of a larger value would cleanly reveal the presence of new physics. Methods to measure Delta Gamma_d at current and future experiments are reviewed and an attractive new approach is proposed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
