Search for the KS → e+e- decay with the KLOE detector

被引：15

作者：

Ambrosino, F. ^{[4
,5
]}

Antonelli, A. ^{[2
]}

Antonelli, M. ^{[2
]}

Archilli, F. ^{[1
,9
]}

Beltrame, R. ^{[3
]}

Bencivenni, G. ^{[2
]}

Bertolucci, S. ^{[2
]}

Bini, C. ^{[7
,8
]}

Bloise, C. ^{[2
]}

Bocchetta, S. ^{[10
,11
]}

Bossi, F. ^{[2
]}

Branchini, P. ^{[11
]}

Campana, P. ^{[2
]}

Capon, G. ^{[2
]}

Capriotti, D. ^{[10
,11
]}

Capussela, T. ^{[2
]}

Ceradini, F. ^{[10
,11
]}

Ciambrone, P. ^{[2
]}

Crucianelli, F. ^{[7
]}

De Lucia, E. ^{[2
]}

De Santis, A. ^{[7
,8
]}

De Simone, P. ^{[2
]}

De Zorzi, G. ^{[7
,8
]}

Denig, A. ^{[3
]}

Di Domenico, A. ^{[7
,8
]}

Di Donato, C. ^{[5
]}

Di Micco, B. ^{[10
,11
]}

Dreucci, M. ^{[2
]}

Felici, G. ^{[2
]}

Ferrer, M. L. ^{[2
]}

Fiore, S. ^{[7
,8
]}

Franzini, P. ^{[7
,8
]}

Gatti, C. ^{[2
]}

Gauzzi, P. ^{[7
,8
]}

Giovannella, S. ^{[2
]}

Graziani, E. ^{[11
]}

Kluge, W. ^{[3
]}

Kulikov, V. ^{[13
]}

Lanfranchi, G. ^{[2
]}

Lee-Franzini, J. ^{[2
,12
]}

Leone, D. ^{[3
]}

Martini, M. ^{[2
,6
]}

Massarotti, P. ^{[4
,5
]}

Meola, S. ^{[4
,5
]}

Miscetti, S. ^{[2
]}

Moulson, M. ^{[2
]}

Mueller, S. ^{[2
]}

Murtas, F. ^{[2
]}

Napolitano, M. ^{[4
,5
]}

Nguyen, F. ^{[10
,11
]}

机构：

[1] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[2] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[3] Univ Karlsruhe, Inst Expt Kernphys, Karlsruhe, Germany

[4] Univ Naples Federico 2, Dipartimento Sci Fis, Naples, Italy

[5] Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy

[6] Univ Roma La Sapienza, Dipartimento Energet, Rome, Italy

[7] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy

[8] Ist Nazl Fis Nucl, Sez Roma, Rome, Italy

[9] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy

[10] Univ Roma Tre, Dipartimento Fis, Rome, Italy

[11] Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy

[12] SUNY Stony Brook, Dept Phys, Stony Brook, NY USA

[13] Inst Theoret & Expt Phys, Moscow 117259, Russia

来源：

PHYSICS LETTERS B | 2009年 / 672卷 / 03期

关键词：

e(+)e(-) collisions; DA phi NE; KLOE; Rare K-S decays; CP; chi(PT);

D O I：

10.1016/j.physletb.2009.01.037

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the result of a direct search for the decay K-S -> e(+)e(-), obtained with a sample of e(+)e(-) -> phi -> KSKL events produced at DA phi NE, the Frascati phi-factory, for an integrated luminosity of 1.9 fb(-1). The search has been performed using a pure K-S beam tagged by the simultaneous detection of a K-L interaction in the calorimeter. Background rejection has been optimized by using both kinematic and particle identification cuts. We find BR(KS -> e(+)e(-)) < 9 x 10(-9) at 90% CL, which improves by an order of magnitude on the previous best limit, (C) 2009 Elsevier B.V, All rights reserved.

引用

页码：203 / 208

页数：6

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