Measurement of σ(e+e- → π+π-γ) and extraction of σ(e+e- → π+π-) below 1 GeV with the KLOE detector

被引：222

作者：

Aloisio, A

Ambrosino, F

Antonelli, A

Antonelli, M

Bacci, C

Barva, M

Bencivenni, G

Bertolucci, S

Bini, C

Bloise, C

Bocci, V

Bossi, F

Branchini, P

Bulychjov, SA

Caloi, R

Campana, P

Capon, G

Capussela, T

Carboni, G

Ceradini, F

Cervelli, F

Cevenini, F

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, M

Erriquez, O

Farilla, A

Felici, G

Ferrari, A

Ferrer, ML

Finocchiaro, G

Forti, C

Franzini, P

Gatti, C

Gauzzi, P

Giovannella, S

Gorini, E

Graziani, E

机构：

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

[2] Univ Bari, Dipartimento Fis, I-70121 Bari, Italy

[3] Sezione Ist Nazl Fis Nucl, Bari, 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, 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] 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] Sezione Ist Nazl Fis Nucl, 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

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

[19] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

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

来源：

PHYSICS LETTERS B | 2005年 / 606卷 / 1-2期

关键词：

hadronic cross section; initial state radiation; pion form factor; muon anomaly;

D O I：

10.1016/j.physletb.2004.11.068

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the cross section sigma(e(+)e(-) --> pi (+) pi (-) y) at an energy W = m(phi) = 1.02 GeV with the KLOE detector at the electron-positron collider DAPhiNE. From the dependence of the cross section on the invariant mass of the two-pion system, we extract sigma(e(+) e(-) --> pi(+)pi(-)) for the mass range 0.35 < s < 0.95 GeV2. From this result, we calculate the pion form factor and the hadronic contribution to the muon anomaly, A(mu). (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：12 / 24

页数：13

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