Measurement of the branching fraction for the decay KS→πeν

被引:25
作者
Aloisio, A
Ambrosino, F
Andryakov, A
Antonelli, A
Antonelli, M
Bacci, C
Bencivenni, G
Bertolucci, S
Bini, C
Bloise, C
Bocci, V
Bossi, F
Branchini, P
Bulychjov, SA
Cabibbo, G
Caloi, R
Campana, P
Capon, G
Carboni, G
Casarsa, M
Casavola, V
Cataldi, G
Ceradini, F
Cervelli, F
Cevenini, F
Chiefari, G
Ciambrone, P
Conetti, S
De Lucia, E
De Robertis, G
De Sangro, R
De Simone, P
De Zorzi, G
Dell'Agnello, S
Denig, A
Di Domenico, A
Di Donato, C
Di Falco, S
Doria, A
Dreucci, M
Erriquez, O
Farilla, A
Felici, G
Ferrari, A
Ferrer, ML
Finocchiaro, G
Forti, C
Franceschi, A
Franzini, P
Gatti, C
机构
[1] Univ Naples Federico II, Dipartimento Sci Fis, Naples, Italy
[2] Sezione Ist Nazl Fis Nucl, Naples, Italy
[3] Univ Bari, Dipartimento Fis, Bari, Italy
[4] Sezione Ist Nazl Fis Nucl, Bari, Italy
[5] Univ Virginia, Dept Phys, Charlottesville, VA USA
[6] Ist Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, Italy
[7] Univ Karlsruhe, Inst Expt Kernphys, Karlsruhe, Germany
[8] Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy
[9] Sezione Ist Nazl Fis Nucl, I-73100 Lecce, Italy
[10] Univ Roma La Sapienza, Dipartimento Energet, Rome, Italy
[11] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[12] Sezione Ist Nazl Fis Nucl, Rome, Italy
[13] Univ Roma Tor Vergata, Dipartimento Fis, Rome, Italy
[14] Univ Roma Tre, Dipartimento Fis, Rome, Italy
[15] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA
[16] Univ Trieste, Dipartimento Fis, Trieste, Italy
[17] Sezione Ist Nazl Fis Nucl, Trieste, Italy
[18] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[19] Inst Theoret & Expt Phys, Moscow, Russia
关键词
D O I
10.1016/S0370-2693(02)01733-1
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a measurement of the branching ratio BR(K-S --> pi(+/-)e(-/+)v(v)) performed using the KLOE detector. K-S-mesons are produced in the reaction e(+)e(-) --> phi --> KSKL at the DAPhiNE collider. In a sample of similar to 5 x 106 K-S-tagged events we find 624+/-30 semileptonic K-S decays. Normalizing to the K-S --> pi(+)pi(-) count in the same data sample, we obtain BR(K-S --> piev) = (6.91+/-0.37) x 10(-4), in agreement with the Standard Model expectation. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:37 / 42
页数:6
相关论文
共 16 条
[1]   The KLOE electromagnetic calorimeter [J].
Adinolfi, M ;
Ambrosino, F ;
Antonelli, A ;
Antonelli, M ;
Anulli, F ;
Barbiellini, G ;
Bencivenni, G ;
Bertolucci, S ;
Bini, C ;
Bloise, C ;
Bocci, V ;
Bossi, F ;
Branchini, P ;
Cabibbo, G ;
Caloi, R ;
Campana, P ;
Casarsa, M ;
Cataldi, G ;
Ceradini, F ;
Cervelli, F ;
Ciambrone, P ;
De Lucia, E ;
De Sinione, P ;
De Zorzi, G ;
Dell'Agnello, S ;
Denig, A ;
Di Domenico, A ;
Di Donato, C ;
Di Falco, S ;
Doria, A ;
Erriquez, O ;
Farilla, A ;
Ferrari, A ;
Ferrer, ML ;
Finocchiaro, G ;
Forti, C ;
Franceschi, A ;
Franzini, P ;
Gao, ML ;
Gatti, C ;
Gauzzi, P ;
Giannasi, A ;
Giovannella, S ;
Graziani, E ;
Han, HG ;
Han, SW ;
Huang, X ;
Incagli, M ;
Ingrosso, L ;
Keeble, L .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2002, 482 (1-2) :364-386
[2]  
ADINOLFI M, LNF92019 IR KLOE COL
[3]  
ADINOLFI M, LNF0202 P KLOE COLL
[4]  
ADINOLFI M, IN PRESS NUCL INST A
[5]  
ADINOLFI M, LNF93002 IR KLOE COL
[6]   Observation of KS0 semileptonic decays with the CMD-2 detector [J].
Akhmetshin, RR ;
Anashkin, EV ;
Arpagaus, M ;
Aulchenko, VM ;
Banzarov, VS ;
Barkov, LM ;
Baru, SE ;
Bashtovoy, NS ;
Bondar, AE ;
Bondarev, DV ;
Bragin, AV ;
Chernyak, DV ;
Chertovskikh, AG ;
Dvoretsky, AS ;
Eidelman, SI ;
Fedotovich, GV ;
Gabyshev, NI ;
Grebeniuk, AA ;
Grigoriev, DN ;
Ivanov, PM ;
Karpov, SV ;
Khazin, BI ;
Koop, IA ;
Kurdadze, LM ;
Kuzmin, AS ;
Logashenko, IB ;
Lukin, PA ;
Mikhailov, KY ;
Nesterenko, IN ;
Okhapkin, VS ;
Perevedentsev, EA ;
Popov, AS ;
Purlatz, TA ;
Root, NI ;
Ruban, AA ;
Ryskulov, NM ;
Shamov, AG ;
Shatunov, YM ;
Shekhtman, AI ;
Shwartz, BA ;
Sidorov, VA ;
Skrinsky, AN ;
Smakhtin, VP ;
Snopkov, IG ;
Solodov, EP ;
Stepanov, PY ;
Sukhanov, AI ;
Titov, VM ;
Yudin, YV ;
Zverev, SG .
PHYSICS LETTERS B, 1999, 456 (01) :90-94
[7]  
BROWN N, 1992, DAPHINE PHYSICS HDB, V2, P447
[8]   ALMOST FORBIDDEN DELTA-Q=(-)DELTA-S PROCESSES [J].
DIB, CO ;
GUBERINA, B .
PHYSICS LETTERS B, 1991, 255 (01) :113-116
[9]   PROPOSED EXPERIMENT ADDRESSING CP AND CPT VIOLATION IN THE K0-KBAR0 SYSTEM [J].
DUNIETZ, I ;
HAUSER, J ;
ROSNER, JL .
PHYSICAL REVIEW D, 1987, 35 (07) :2166-2177
[10]  
FRANZINI P, 1997, P S FLAV CHANG NEUTR, P345