Large ΔI=3/2 contribution to ε′/ε in supersymmetry

被引：38

作者：

Kagan, AL ^{[1
]}

Neubert, M ^{[1
]}

机构：

[1] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.83.4929

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that in supersymmetric extensions of the standard model gluino box diagrams can yield a large CP-violating Delta I = 3/2 contribution to s --> d (q) over bar q flavor-changing neutral current processes, which feeds into the I = 2 isospin amplitude in K --> pi pi decays. This contribution requires only moderate mass splitting between the right-handed squarks (u) over tilde(R) and (d) over tilde(R) and persists for squark masses of order 1 TeV. Taking into account current bounds from K-(K) over bar mixing, the reulting contribution to epsilon(1)/epsilon could naturally be an order of magnitude larger than the measured value.

引用

页码：4929 / 4932

页数：4

共 26 条

[1] Observation of direct CP violation in KS,L → ππ decays [J].

Alavi-Harati, A ;

Albuquerque, IF ;

Alexopoulos, T ;

Arenton, M ;

Arisaka, K ;

Averitte, S ;

Barker, AR ;

Bellantoni, L ;

Bellavance, A ;

Belz, J ;

Ben-David, R ;

Bergman, DR ;

Blucher, E ;

Bock, GJ ;

Bown, C ;

Bright, S ;

Cheu, E ;

Childress, S ;

Coleman, R ;

Corcoran, MD ;

Corti, G ;

Cox, B ;

Crisler, MB ;

Erwin, AR ;

Ford, R ;

Glazov, A ;

Golossanov, A ;

Graham, G ;

Graham, J ;

Hagan, K ;

Halkiadakis, E ;

Hanagaki, K ;

Hidaka, S ;

Hsiung, YB ;

Jejer, V ;

Jennings, J ;

Jensen, DA ;

Kessler, R ;

Kobrak, HGE ;

LaDue, J ;

Lath, A ;

Ledovskoy, A ;

McBride, PL ;

McManus, AP ;

Mikelsons, P ;

Monnier, E ;

Nakaya, T ;

Nauenberg, U ;

Nelson, KS ;

Nguyen, H .

PHYSICAL REVIEW LETTERS, 1999, 83 (01) :22-27

[2]

BABU KS, HEPPH9905464

[3]

BAEK S, HEPPH9907572

[4]

BARBIERI R, HEPPH9908255

[5] A NEW MEASUREMENT OF DIRECT CP VIOLATION IN THE NEUTRAL KAON SYSTEM [J].

BARR, GD ;

BUCHHOLZ, P ;

CAROSI, R ;

COWARD, D ;

CUNDY, D ;

DOBLE, N ;

GATIGNON, L ;

GIBSON, V ;

GRAFSTROM, P ;

HAGELBERG, R ;

VANDERLANS, J ;

NELSON, HN ;

WAHL, H ;

PEACH, KJ ;

BLUMER, H ;

HEINZ, R ;

KLEINKNECHT, K ;

MAYER, P ;

PANZER, B ;

RENK, B ;

ROHRER, H ;

SANDER, HG ;

WAGNER, A ;

AUGE, E ;

FOURNIER, D ;

HEUSSE, P ;

ICONOMIDOUFAYARD, L ;

HARRUS, I ;

PERDEREAU, O ;

SCHAFFER, AC ;

SERIN, L ;

BERTANZA, L ;

BIGI, A ;

CALAFIURA, P ;

CALVETTI, M ;

CARROZZA, MC ;

CASALI, R ;

CERRI, C ;

FANTECHI, R ;

MANNELLI, IG ;

MARZULLI, VM ;

NAPPI, A ;

PIERAZZINI, G ;

HOLDER, M ;

KREUTZ, A ;

QUAST, G ;

ROST, M ;

WERTHENBACH, R ;

ZECH, G .

PHYSICS LETTERS B, 1993, 317 (1-2) :233-242

[6]

BELKOV AA, HEPPH9907335

[7]

BERTOLINI S, HEPPH9802405

[8]

BOSCH S, HEPPH9904408

[9] Weak decays beyond leading logarithms [J].

Buchalla, G ;

Buras, AJ ;

Lautenbacher, ME .

REVIEWS OF MODERN PHYSICS, 1996, 68 (04) :1125-1244

[10] Upper bounds on K→πν(ν)over-bar and KL→π0e+e- from ε′/ε and KL→μ+μ- [J].

Buras, AJ ;

Silvestrini, L .

NUCLEAR PHYSICS B, 1999, 546 (1-2) :299-314

← 1 2 3 →