Study of the KL0 → π+π-γ direct emission vertex

被引：16

作者：

Alavi-Harati, A

Alexopoulos, T

Arenton, M

Arisaka, K

Averitte, S

Barker, AR

Bellantoni, L

Bellavance, A

Belz, J ^{[1
]}

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

Hamm, J

Hanagaki, K

Hidaka, S

Hsiung, YB

Jejer, V

Jensen, DA

Kessler, R

Kobrak, HGE

LaDue, J

Lath, A

Ledovskoy, A

McBride, PL

Mikelsons, P

Monnier, E

Nakaya, T

Nelson, KS

Nguyen, H

O'Dell, V

Pang, M

Pordes, R

机构：

[1] Rutgers State Univ, Piscataway, NJ 08855 USA

[2] Rice Univ, Houston, TX 77005 USA

[3] Osaka Univ, Toyonaka, Osaka 560, Japan

[4] Fermi Natl Accelerator Lab, Batavia, IL 60510 USA

[5] Elmhurst Coll, Elmhurst, IL 60126 USA

[6] Univ Colorado, Boulder, CO 80309 USA

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

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

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

[10] Univ Arizona, Tucson, AZ 85721 USA

[11] Univ Virginia, Charlottesville, VA 22901 USA

[12] Univ Wisconsin, Madison, WI 53706 USA

[13] Montana State Univ, Bozeman, MT 59717 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.86.761

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have perfomed studies of the K-L(0) --> pi (+) pi (-) gamma direct emission (DE) and inner Bremsstrahlung (IB) vertices, based on data collected by KTeV during the 1996 Fermilab fixed target run. We find a(1)/a(2) = -0.737 +/- 0.034 GeV2 for the DE form-factor parameter in the rho -propagator parametrization, and report on fits of the form factor to linear and quadratic functions as well. We concurrently measure Gamma (K-L(0) --> pi (+) pi (-) gamma ,E-gamma*: > 20 MeV)/Gamma (K-L(0) --> pi (+) pi (-)) = (20.8 +/- 0.3) x 10(-3), and a K-L(0) --> pi (+) pi (-) gamma DE/(DE + IB) branching ratio of 0.683 +/- 0.011.

引用

页码：761 / 764

页数：4

共 16 条

[1] Observation of CP violation in KL→π+π-e+e- decays [J].

Alavi-Harati, A ;

Albuquerque, IF ;

Alexopouos, 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 ;

Hazumi, M ;

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 .

PHYSICAL REVIEW LETTERS, 2000, 84 (03) :408-411

[2] 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

[3] POSSIBLE CP-NONINVARIANT EFFECTS IN PIPIGAMMA DECAY OF NEUTRAL KAONS [J].

COSTA, G ;

KABIR, PK .

NUOVO CIMENTO A, 1967, 51 (02) :564-+

[4] CP violation in kaon decays [J].

D'Ambrosio, G ;

Isidori, G .

INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 1998, 13 (01) :1-93

[5] NONLEPTONIC KAON DECAYS AND THE CHIRAL ANOMALY [J].

ECKER, G ;

NEUFELD, H ;

PICH, A .

NUCLEAR PHYSICS B, 1994, 413 (1-2) :321-352

[6] Final-state interactions and CP violation in K-L->pi(+)pi(-)e(+)e(-) [J].

Elwood, JK ;

Wise, MB ;

Savage, MJ ;

Walden, JW .

PHYSICAL REVIEW D, 1996, 53 (07) :4078-4081

[7] K-L->pi(+)pi(-)e(+)e(-) (vol 52, pg 5095, 1995) [J].

Elwood, JK ;

Wise, MB ;

Savage, MJ .

PHYSICAL REVIEW D, 1996, 53 (05) :2855-2855

[8] K-L-]PI(+)PI(-)E(+)E(-) [J].

ELWOOD, JK ;

WISE, MB ;

SAVAGE, MJ .

PHYSICAL REVIEW D, 1995, 52 (09) :5095-5105

[9] DIRECT AND INDIRECT CP VIOLATION IN THE DECAY KL-]PI+PI-E+E- [J].

HEILIGER, P ;

SEHGAL, LM .

PHYSICAL REVIEW D, 1993, 48 (09) :4146-4154

[10] MINUIT - SYSTEM FOR FUNCTION MINIMIZATION AND ANALYSIS OF PARAMETER ERRORS AND CORRELATIONS [J].

JAMES, F ;

ROOS, M .

COMPUTER PHYSICS COMMUNICATIONS, 1975, 10 (06) :343-367

← 1 2 →