New extraction of CP violation in b-baryon decays

被引：5

作者：

Geng, Chao-Qiang ^{[1
,2
]}

Jin, Xiang -Nan ^{[1
,2
]}

Liu, Chia -Wei ^{[1
,2
]}

Wei, Zheng-Yi ^{[1
,2
]}

Zhang, Jiabao ^{[1
,2
]}

机构：

[1] UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100190, Peoples R China

来源：

PHYSICS LETTERS B | 2022年 / 834卷

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.physletb.2022.137429

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study CP violation in b-baryon decays of Xi(-)(b) -> Xi D- with D = D-0, D(over line)(0) and D-i (i = 1, 2). We find that these baryonic decay processes provide an ideal opportunity to measure the weak phase due to the absence of the relative strong phase. Explicitly, we relate rho(over line) and eta(over line) the CKM elements with the decay rate ratios of R-i = gamma(Xi(-)(b) -> Xi D--(i))/gamma(Xi-(-)(b) ->Xi D--(0)) without the charge conjugate states. As a complementary, we also examine the decay distributions of lambda(b) -> lambda(-> p pi(-))D. There are in total 32 decay observables, which can be parameterized by 9 real parameters, allowing the experiments to extract the angle gamma equivalent to arg(-VudVub*/VcdVcb*) in the CKM unitarity triangle. In addition, the feasibilities of the experimental measurements are discussed. We find that rho(over line) and eta(over line) can be extracted at LHCb Run3 from Xi(-)(b) -> Xi D-, and a full analysis of lambda(b) -> lambda(-> p pi(-))D is available at LHCb Run4. (c) 2022 The Author(s). Published by Elsevier B.V.

引用

页数：8

共 45 条

[31] CP-violating polarization asymmetry in charmless two-body decays of beauty baryons [J].

He, Min ;

He, Xiao-Gang ;

Li, Guan-Nan .

PHYSICAL REVIEW D, 2015, 92 (03)

[32] Direct CP violation in Λb decays [J].

Hsiao, Y. K. ;

Geng, C. Q. .

PHYSICAL REVIEW D, 2015, 91 (11)

[33] Restudy of the color-allowed two-body nonleptonic decays of bottom baryons Ξb and Ωb supported by hadron spectroscopy [J].

Li, Yu-Shuai ;

Liu, Xiang .

PHYSICAL REVIEW D, 2022, 105 (01)

[34]

Liu CW, 2022, Arxiv, DOI arXiv:2205.08158

[35] Anatomy of the perturbative QCD approach to the baryonic decays Λb → pπ, pK [J].

Lue, Cai-Dian ;

Wang, Yu-Ming ;

Zou, Hao ;

Ali, Ahmed ;

Kramer, Gustav .

PHYSICAL REVIEW D, 2009, 80 (03)

[36] PARITY VIOLATION AND FLAVOR SELECTION-RULES IN CHARMED-BARYON DECAYS [J].

PAKVASA, S ;

TUAN, SF ;

ROSEN, SP .

PHYSICAL REVIEW D, 1990, 42 (11) :3746-3754

[37] Measurement of the Λb polarization and angular parameters in Λb → J/ψΛ decays from pp collisions at √s=7 and 8 TeV [J].

Sirunyan, A. M. ;

Tumasyan, A. ;

Adam, W. ;

Ambrogi, F. ;

Asilar, E. ;

Bergauer, T. ;

Brandstetter, J. ;

Brondolin, E. ;

Dragicevic, M. ;

Ero, J. ;

Del Valle, A. Escalante ;

Flechl, M. ;

Friedl, M. ;

Fruhwirth, R. ;

Ghete, V. M. ;

Grossmann, J. ;

Hrubec, J. ;

Jeitler, M. ;

Konig, A. ;

Krammer, N. ;

Kratschmer, I. ;

Liko, D. ;

Madlener, T. ;

Mikulec, I. ;

Pree, E. ;

Rad, N. ;

Rohringer, H. ;

Schieck, J. ;

Schofbeck, R. ;

Spanring, M. ;

Spitzbart, D. ;

Taurok, A. ;

Waltenberger, W. ;

Wittmann, J. ;

Wulz, C. -E. ;

Zarucki, M. ;

Chekhovsky, V. ;

Mossolov, V. ;

Gonzalez, J. Suarez ;

DeWolf, E. A. ;

Di Croce, D. ;

Janssen, X. ;

Lauwers, J. ;

Van Haevermaet, H. ;

Van Mechelen, P. ;

Van Remortel, N. ;

Abu Zeid, S. ;

Blekman, F. ;

D'Hondt, J. ;

De Bruyn, I. .

PHYSICAL REVIEW D, 2018, 97 (07)

[38] Perturbative corrections to Λb → Λ form factors from QCD light-cone sum rules [J].

Wang, Yu-Ming ;

Shen, Yue-Long .

JOURNAL OF HIGH ENERGY PHYSICS, 2016, (02)

[39]

Xing ZP, 2022, Arxiv, DOI arXiv:2203.13524

[40]

Zhang C.Q., ARXIV

← 1 2 3 4 5 →