Study of the process e+e- → ωπ0 in the φ-meson mass region with the KLOE detector

被引：47

作者：

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

Antonelli, A. ^{[2
]}

Antonelli, M. ^{[2
]}

Archilli, F. ^{[8
,9
]}

Beltrame, P. ^{[3
]}

Bencivenni, G. ^{[2
]}

Bertolucci, S. ^{[2
]}

Bini, C. ^{[1
,7
]}

Bloise, C. ^{[2
]}

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

Bossi, F. ^{[2
]}

Branchini, R. ^{[11
]}

Campana, R. ^{[2
]}

Capon, G. ^{[2
]}

Capussela, T. ^{[2
]}

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

Ciambrone, P. ^{[2
]}

Crucianelli, F. ^{[1
]}

De Lucia, E. ^{[2
]}

De Santis, A. ^{[1
,7
]}

De Simone, P. ^{[2
]}

De Zorzi, G. ^{[1
,7
]}

Denig, A. ^{[3
]}

Di Domenico, A. ^{[1
,7
]}

Di Donato, C. ^{[5
]}

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

Dreucci, M. ^{[2
]}

Felici, G. ^{[2
]}

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

Fiore, S. ^{[1
,7
]}

Franzini, P. ^{[1
,7
]}

Gatti, C. ^{[2
]}

Gauzzi, P. ^{[1
,7
]}

Giovannella, S. ^{[2
]}

Graziani, E. ^{[11
]}

Kluge, W. ^{[3
]}

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
]}

Palutan, M. ^{[2
]}

Pasqualucci, E. ^{[7
]}

机构：

[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 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 II, 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] Ist Nazl Fis Nucl, Sez Roma, Rome, Italy

[8] Univ Roma Tor Vergata, Dipartimento Fis, 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 11794 USA

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

来源：

PHYSICS LETTERS B | 2008年 / 669卷 / 3-4期

关键词：

e(+)e(-) collisions; Rare phi decays; VMD; OZI violation; Isospin violation;

D O I：

10.1016/j.physletb.2008.09.056

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have studied the e(+)e(-) -> omega pi(0) cross section in the root s interval 1000-1030 MeV using the pi(+)pi(-)pi(0)pi(0) and pi(0)pi(0)gamma final states with a sample of similar to 6000 pb(-1) collected with the KLOE detector at DAONE. By fitting the observed interference pattern around M-phi for both final states, we extract the ratio of the decay widths Gamma(omega -> pi(0)gamma)/Gamma(omega -> pi(+)pi(-)pi(0)) = 0.0897 +/- 0.0016 and derive the branching fractions BR(omega -> pi(+)pi(-)pi(0)) = (90.24 +/- 0.19)%, BR(omega -> pi(0)gamma) = (8.09 +/- 0.14)%. The parameters describing the e(+)e(-) -> pi(+)pi(-)pi(0)pi(0) reaction around M-phi are also used to extract the branching fraction for the OZI and G-parity violating phi -> omega pi(0) decay: BR(phi -> omega pi(0)) = (4.4 +/- 0.6) x 10(-5). (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：223 / 228

页数：6

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