作者机构：
[Li, Yiming; Chen, Shanzhen] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.;[Qian, Wenbin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.;[Shen, Zhihong; Zhang, Yanxi; Yang, Zhenwei] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.;[Shen, Zhihong; Zhang, Yanxi; Yang, Zhenwei] Peking Univ, Sch Phys, Beijing 100871, Peoples R China.;[Xie, Yuehong] Cent China Normal Univ, Key Lab Quark & Lepton Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Yiming Li] I;Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
关键词：
LHCb;flavour physics;CP vioation
摘要：
Heavy flavour physics provides excellent opportunities to indirectly search for new physics at very high energy scales and to study hadron properties for deep understanding of the strong interaction. The LHCb experiment has been playing a leading role in the study of heavy flavour physics since the start of the LHC operations about ten years ago, and made a range of high-precision measurements and unexpected discoveries, which may have far-reaching implications on the field of particle physics. This review highlights a selection of the most influential physics results on CP violation, rare decays, and heavy flavour production and spectroscopy obtained by LHCb using the data collected during the first two operation periods of the LHC. The upgrade plan of LHCb and the physics prospects are also briefly discussed.
作者机构：
[Lu, Cai-Dian; Bhutta, Faisal Munir] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.;[Li, Ying] Yantai Univ, Dept Phys, Yantai 264005, Peoples R China.;[Lu, Cai-Dian] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.;[Xie, Yue-Hong] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.;[Bhutta, Faisal Munir] Beijing Univ Technol, Coll Appl Sci, Inst Theoret Phys, Beijing 100124, Peoples R China.
通讯机构：
[Bhutta, Faisal Munir] C;[Bhutta, Faisal Munir] B;Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.;Beijing Univ Technol, Coll Appl Sci, Inst Theoret Phys, Beijing 100124, Peoples R China.
关键词：
wrong sign weak decay;new physics;PQCD
摘要：
<jats:title>Abstract</jats:title>
<jats:p>The doubly weak transition
<jats:inline-formula>
<jats:tex-math><?CDATA $b\to dd{\bar s}$?></jats:tex-math>
<jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_7_073102_M2.jpg" xlink:type="simple" />
</jats:inline-formula> is highly suppressed in the Standard Model, which makes it a potential channel for exploring new physics signals. We present a study of the exclusive two-body wrong sign weak decay
<jats:inline-formula>
<jats:tex-math><?CDATA $\smash{\overline B}^0\to K^+\pi^-$?></jats:tex-math>
<jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_7_073102_M3.jpg" xlink:type="simple" />
</jats:inline-formula> , which belongs to this class, in the perturbative QCD framework. We perform a model independent analysis for various effective dimension-6 operators for which large effects are possible. We further analyze the considered process in the Randall-Sundrum model, including the custodially protected and the bulk-Higgs Randall-Sundrum models. Exploring the experimentally favored parameter space of these models leads to a large and significant enhancement of the decay rate compared to the Standard Model, which might be accessible in future experiments. We propose to search for the wrong sign decay
<jats:inline-formula>
<jats:tex-math><?CDATA $\smash{\overline B}^0\to K^+\pi^-$?></jats:tex-math>
<jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_7_073102_M4.jpg" xlink:type="simple" />
</jats:inline-formula> via flavor-tagged time-dependent analyses, which can be performed at LHCb and Belle-II.
</jats:p>
通讯机构：
[Liu, Xin] J;Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China.
摘要：
We formulate the most general time-dependent distributions of Bs→J/ψ(→l+l−)ϕ(→K+K−) in which the direct charge parity ( CP) violation is explicitly incorporated. We investigate the B→J/ψV decays in the perturbative QCD approach where V is a light vector meson. Apart from the leading-order factorizable contributions, we also take into account QCD vertex corrections and the hard-spectator diagrams. With the inclusion of these sizable corrections, most of our theoretical results for CP-averaged branching ratios, polarization fractions, CP-violating asymmetries, and relative phases are consistent with the available data. Based on the global agreement, we further explore the penguin contributions and point out that the ϕs extracted from Bs→J/ψϕ can be shifted away by O(10−3).
期刊：
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2001年25(6):465-475 ISSN：0254-3052
通讯作者：
Rong, G
作者机构：
[Rong, G] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.;Univ Sci & Technol China, Dept Modern Phys, Anhua 230026, Peoples R China.;Shandong Univ, Dept Phys, Jinan 250100, Peoples R China.;Hangzhou Univ, Dept Phys, Hangzhou 310028, Peoples R China.;Shanghai Jiao Tong Univ, Dept Appl Phys, Shanghai 200030, Peoples R China.
通讯机构：
[Rong, G] C;Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
关键词：
Beijing Electron Positron Collider (BEPC);Beijing Spectrometer (BES);D-s(+) Meson;D-s(+) single tag;branching fraction;production cross section;radiative correction
摘要：
Measurement of the production cross section of the D-s(+) D-s(-) in e(+) e(-) annihilation at the Center-of-Mass Energy of roots = 4.03 GeV is reported in the paper. The cross section for the D: DI production has been measured using a data sample of 22.3 pb(-1) collected with BES detector at BEPC e(+) e(-) collider. The D-s(+) measons are reconstructed in the phi pi (+), (K*(0)) over barK(+) and (K-0) over barK(+) decay modes. A total number of 94 +/- 13 singly tagged D-s(+) events is obtained from the three modes. This yelds the cross section value sigmaD(s)(prod+)D(s)(-) = (451 +/- 63 +/- 118)pb for D-s(+) D-s(-) production. Based on the numbers of singly tagged D-s(+) events for each of the three decay modes,the decay branching fractions for D-s(+) --> (K*(0)) over barK(+) and (K-0) over barK(+) have been determined to be (3.02 +/- 0.94 +/- 0.91)% and (3.28 +/- 1.22 +/- 0.94)%, respectively.
