ΔACP within the Standard Model and beyond

被引：55

作者：

Chala, Mikael ^{[1
]}

Lenz, Alexander ^{[1
]}

Rusov, Aleksey V. ^{[1
]}

Scholtz, Jakub ^{[1
]}

机构：

[1] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2019年 / 2019卷 / 07期

关键词：

CP violation; Heavy Quark Physics; CP-VIOLATION; DISCARDING 1/N(C); QCD; RULE; DIFFERENCE; SEARCH; DECAYS; BEAUTY; D-0;

D O I：

10.1007/JHEP07(2019)161

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In light of the recent LHCb observation of CP violation in the charm sector, we review standard model (SM) predictions in the charm sector and in particular for Delta A(CP). We get as an upper bound in the SM |Delta A| <= 3.6 x 10(-4), which can be compared to the measurement of Delta ALHCb2019 = (-15.4 +/- 2.9) x 10(-4). We discuss resolving this tension within an extension of the SM that includes a flavour violating Z ' that couples only to ss and cu. We show that for masses below 80 GeV and flavour violating coupling of the order of 10(-4), this model can successfully resolve the tension and avoid constraints from dijet searches, D-0 - 0 mixing and measurements of the Z width.

引用

页数：18

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