Study of the decay φ→ηπ0γ with the KLOE detector

被引：127

作者：

Aloisio, A

Ambrosino, F

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 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

Gauzzi, P

Giovannella, S

机构：

[1] Univ Bari, Dipartmento Fis, Bari, Italy

[2] Sezione Ist Nazl Fis Nucl, I-70126 Bari, Italy

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

[4] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany

[5] Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy

[6] Sezione Ist Nazl Fis Nucl, I-73100 Lecce, Italy

[7] Univ Naples Federico II, Dipartimento Sci Fis, Naples, Italy

[8] Sezione Ist Nazl Fis Nucl, Naples, Italy

[9] Univ Pisa, Dipartimento Fis, Pisa, Italy

[10] Sezione Ist Nazl Fis Nucl, Pisa, Italy

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

[12] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[13] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

[14] Sezione Ist Nazl Fis Nucl, Rome, Italy

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

[16] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA

[17] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy

[18] Sezione Ist Nazl Fis Nucl, Trieste, Italy

[19] Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA

[20] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

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

来源：

PHYSICS LETTERS B | 2002年 / 536卷 / 3-4期

关键词：

e(+)e(-); collisions; phi radiative decays; Scalar mesons;

D O I：

10.1016/S0370-2693(02)01821-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In a sample of 5.3 x 10(7), phi-decays observed with the KLOE detector at the Frascati phi-factory DAPhiDNE we find 605 etapi(o)gamma events with eta --> gammagamma and 197 etapi(o)gamma events with eta --> pi(+)pi(-)pi(o). The decay etapi(o)gamma is dominated by the process phi --> a(o)gamma. From a fit to the etapi(o) mass spectrum we find BR(phi --> a(o)(980)gamma) = (7.4 +/- 0.7) x 10(-5). (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：209 / 216

页数：8

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