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

来源：

PHYSICS LETTERS B | 2002年 / 535卷 / 1-4期

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

页码：37 / 42

页数：6

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

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