Measurements of semileptonic KL decay form factors -: art. no. 092007

被引：68

作者：

Alexopoulos, T ^{[1
]}

Arenton, M

Barbosa, RF

Barker, AR

Bellantoni, L

Bellavance, A

Blucher, E

Bock, GJ

Cheu, E

Childress, S

Coleman, R

Corcoran, MD

Cox, B

Erwin, AR

Ford, R

Glazov, A

Golossanov, A

Graham, J

Hamm, J

Hanagaki, K

Hsiung, YB

Huang, H

Jejer, V

Jensen, DA

Kessler, R

Kobrak, HGE

Kotera, K

LaDue, J

Ledovskoy, A

McBride, PL

Monnier, E

Nelson, KS

Nguyen, H

Niclasen, R

Prasad, V

Qi, XR

Ramberg, EJ

Ray, RE

Ronquest, M

Santos, E

Shanahan, P

Shields, J

Slater, W

Smith, D

Solomey, N

Swallow, EC

Tesarek, RJ

Toale, PA

Tschirhart, R

Wah, YW

机构：

[1] Univ Wisconsin, Madison, WI 53706 USA

[2] Univ Arizona, Tucson, AZ 85721 USA

[3] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[4] Univ Calif San Diego, La Jolla, CA 92093 USA

[5] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[6] Univ Colorado, Boulder, CO 80309 USA

[7] Elmhurst Coll, Elmhurst, IL 60126 USA

[8] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[9] Osaka Univ, Osaka 5600043, Japan

[10] Rice Univ, Houston, TX 77005 USA

[11] Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA

[12] Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22901 USA

[13] Univ Sao Paulo, Sao Paulo, Brazil

[14] CNRS, CPP Marseille, F-75700 Paris, France

来源：

PHYSICAL REVIEW D | 2004年 / 70卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.70.092007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present new measurements of K-L semileptonic form factors using data collected in 1997 by the KTeV (E832) experiment at Fermilab. The measurements are based on 1.9x10(6) K-L-->pi(+/-)e(-/+)nu and 1.5x10(6) K-L-->pi(+/-)mu(-/+)nu decays. For f(+)(t), we measure both a linear and quadratic term: lambda(+)(')=(20.64+/-1.75)x10(-3) and lambda(+)('')=(3.20+/-0.69)x10(-3). For f(0)(t), we find lambda(0)=(13.72+/-1.31)x10(-3). These form factors are consistent with K+/- form factors, suggesting that isospin symmetry breaking effects are small. We use our measured values of the form factors to evaluate the decay phase space integrals, I-K(e)=0.15350+/-0.00105 and I-K(mu)=0.10165+/-0.00080, where errors include uncertainties arising from the form factor parametrizations.

引用

页码：092007 / 1

页数：15

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