ITA
ENG

Study of the K-L(0) -> pi(+)pi(-)gamma direct emission vertex

Authors

Alavi-Harati, A 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 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 Prasad, V Quinn, B Ramberg, EJ Ray, RE Roodman, A Sadamoto, M Schnetzer, S Senyo, K Shanahan, P Shawhan, PS Shields, J Slater, W Solomey, N Somalwar, SV Stone, RL Suzuki, I Swallow, EC Taegar, SA Tesarek, RJ Thomson, GB Toale, PA Tripathi, A Tschirhart, R Turner, SE Wah, YW Wang, J White, HB Whitmore, J Winstein, B Winston, R Yamanaka, T Zimmerman, ED

Citation

A. Alavi-harati et al., Study of the K-L(0) -> pi(+)pi(-)gamma direct emission vertex, PHYS REV L, 86(5), 2001, pp. 761-764

Citations number

Categorie Soggetti

Physics

Journal title

PHYSICAL REVIEW LETTERS

ISSN journal

00319007 → ACNP

Volume

Issue

Year of publication

2001

Pages

761 - 764

Database

ISI

SICI code

0031-9007(20010129)86:5<761:SOTK-P>2.0.ZU;2-Y

Abstract

We have perfomed studies of the K-L(0) --> pi (+) pi (-) gamma direct emiss ion (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 par ametrization, 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 ra tio of 0.683 +/- 0.011.