Quark mixing, CKM unitarity -: The unitarity problem

被引：38

作者：

Abele, H

Barberio, E

Dubbers, D

Glück, F

Hardy, JC

Marciano, WJ

Serebrov, A

Severijns, N

机构：

[1] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[2] So Methodist Univ, Dept Phys, Dallas, TX 75275 USA

[3] Res Inst Nucl & Particle Phys, H-1525 Budapest, Hungary

[4] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA

[5] Brookhaven Natl Lab, Upton, NY 11973 USA

[6] Petersburg Nucl Phys Inst, Gatchina 188350, Leningrad Distr, Russia

[7] Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium

[8] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

EUROPEAN PHYSICAL JOURNAL C | 2004年 / 33卷 / 01期

关键词：

D O I：

10.1140/epjc/s2003-01574-8

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 the Standard Model of elementary particles, quark-mixing is expressed in terms of a 3 x 3 unitary matrix V, the so called Cabibbo-Kobayashi-Maskawa (CKM) matrix. Significant unitarity checks are so far possible for the first row of this matrix. This article reviews the experimental and theoretical information on these matrix elements. On the experimental side, we find a 2.2 sigma to 2.7 sigma deviation from unitarity, which conflicts with the Standard Model.

引用

页码：1 / 8

页数：8

共 66 条

[1] A measurement of the beta asymmetry A in the decay of free neutrons [J].

Abele, H ;

Baessler, S ;

Dubbers, D ;

Last, J ;

Mayerhofer, U ;

Metz, C ;

Muller, TM ;

Nesvizhevsky, V ;

Raven, C ;

Scharpf, O ;

Zimmer, O .

PHYSICS LETTERS B, 1997, 407 (3-4) :212-218

[2] Is the unitarity of the quark-mixing CKM matrix violated in neutron β-decay? -: art. no. 211801 [J].

Abele, H ;

Hoffmann, MA ;

Baessler, S ;

Dubbers, D ;

Glück, F ;

Müller, U ;

Nesvizhevsky, V ;

Reich, J ;

Zimmer, O .

PHYSICAL REVIEW LETTERS, 2002, 88 (21) :4

[3]

ABELE H, 2003, WORKSH P QUARK MIX C

[4]

[Anonymous], 1999, P 5 INT WEIN S PHYS

[5] Neutron life time value measured by storing ultracold neutrons with detection of inelastically scattered neutrons [J].

Arzumanov, S ;

Bondarenko, L ;

Chernavsky, S ;

Drexel, W ;

Fomin, A ;

Geltenbort, P ;

Morozov, V ;

Panin, Y ;

Pendlebury, J ;

Schreckenbach, K .

PHYSICS LETTERS B, 2000, 483 (1-3) :15-22

[6]

BALL P, 2003, P 2 WORKSH CKM UN TR

[7]

Bargiotti M, 2000, RIV NUOVO CIMENTO, V23, P1

[8]

BATTAGLIA M, 2002, P 1 WORKSH CKM UN TR

[9] RADIATIVE CORRECTION TO 5L3 DECAY [J].

BECHERRAWY, T .

PHYSICAL REVIEW D, 1970, 1 (05) :1452-+

[10]

BEENAKKER W, PHYS LEP2

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