Study of the decay φ → f0(980)γ → π + π- γ with the KLOE detector

被引：80

作者：

Ambrosino, F

Antonelli, A

Antonelli, M

Bacci, C ^{[1
]}

Beltrame, P

Bencivenni, G

Bertolucci, S

Bini, C

Bloise, C

Bocci, V

Bossi, F

Bowring, D

Branchini, P

Caloi, R

Campana, P

Capon, G

Capussela, T

Ceradini, E

Chi, S

Chiefari, G

Ciambrone, P

Conetti, S

De Lucia, E

De Santis, A

De Simone, P

De Zorzi, G

Dell'Agnello, S

Denig, A

Di Domenico, A

Di Donato, C

Di Falco, S

Di Micco, B

Doria, A

Dreucci, A

Felici, G

Ferrari, A

Ferrer, ML

Finocchiaro, G

Fiore, S

Forti, C

Franzini, P

Gatti, C

Gauzzi, P

Giovannella, S

Gorini, E

Graziani, E

Incagli, M

Kluge, W

Kulikov, V

Lacava, E

机构：

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

[2] Ist Nazl Fis Nucl, Rome, Italy

[3] Acad Sinica, Inst High Energy Phys, Beijing, Peoples R China

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

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

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

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

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

[9] Univ Naples Federico II, Dipartimento Sci Fisiche, Naples, Italy

[10] Ist Nazl Fis Nucl, I-80125 Naples, Italy

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

[12] Ist Nazl Fis Nucl, Pisa, Italy

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

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

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

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

[17] Univ Virginia, Dept Phys, Charlottesville, VA 22903 USA

来源：

PHYSICS LETTERS B | 2006年 / 634卷 / 2-3期

关键词：

radiative decays of mesons; decays of other mesons;

D O I：

10.1016/j.physletb.2006.01.016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We measured, with the KLOE detector, the spectrum of pi(+)pi(-) invariant mass in a sample of 6.7 x 10(5) e(+)e(-) -> pi(+)pi(-)gamma events with the photon at large polar angle (theta(gamma) > 45 degrees) at a centre of mass energy root s around the phi mass. We observe in this spectrum a clear contribution from the intermediate process phi -> f(0)(980)gamma. A sizeable effect is also observed in the distribution of the pion forward-backward asymmetry. We use different theoretical models to fit the spectrum and we determine the to mass and coupling constants to the phi, to pi(+)pi(-) and to KK. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：148 / 154

页数：7

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