MEASUREMENT OF THE BRANCHING FRACTION OF THE DECAY K-L-]PI(-)E(+)E(-)()PI()

Authors
ADAMS J ALAVIHARATI A ALBUQUERQUE IF ALEXOPOULOS T ARENTON M ARISAKA K AVERITTE S BARKER AR BELLANTONI L BELLAVANCE A BELZ J BENDAVID 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 GRAHAM G GRAHAM J HAGAN KA HALKIADAKIS E HANAGAKI K HAZUMI M HIDAKA S HSIUNG YB JEJER V JENNINGS J JENSEN DA JOHNSON PT KESSLER R KOBRAK HGE LADUE J LATH A LEDOVSKOY A MCMANUS AP MIKELSONS P MONNIER E NAKAYA T NAUENBERG U NELSON KS NGUYEN H ODELL V PANG M PORDES R PRASAD V QIAO C QUINN B RAMBERG E RAY RE RONZHIN A ROODMAN A SADAMOTO M SCHNETZER S SENYO K SHANAHAN P SHAWHAN PS SLATER W SOLOMEY N SOMALWAR SV SUZUKI I STONE RL SWALLOW EC SWANSON RA TAEGAR SA TESAREK RJ THOMSON GB TRIPATHI A TSCHIRHART R WAH YW WHITE HB WHITMORE J WINSTEIN B WINSTON R WU JY YAMANAKA T ZIMMERMAN ED
Citation
J. Adams et al., MEASUREMENT OF THE BRANCHING FRACTION OF THE DECAY K-L-]PI(-)E(+)E(-)()PI(), Physical review letters, 80(19), 1998, pp. 4123-4126
Citations number
12
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
19
Year of publication
1998
Pages
4123 - 4126
Database
ISI
SICI code
0031-9007(1998)80:19<4123:MOTBFO>2.0.ZU;2-F
Abstract
We report the first branching fraction measurement of the decay K-L -- > pi(+)pi(-) e(+)e(-). With a sample of 46 candidates, and an expected background level of 9.4 events, the branching fraction is determined to be B(K-L --> pi(+)pi(-) e(+)e(-)) = [3.2 +/- 0.6(stat) +/- 0.4(syst )] x 10(-7). This measurement was carried out as part of the Fermilab KTeV (E799-II) experiment and is in good agreement with the expectatio ns from the mechanisms of direct emission and inner bremsstrahlung.