A global fit to determine the pseudoscalar mixing angle and the gluonium content of the η′ meson

被引：119

作者：

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

Antonelli, A. ^{[2
]}

Antonelli, M. ^{[2
]}

Archilli, F. ^{[9
,10
]}

Beltrame, P. ^{[3
]}

Bencivenni, G. ^{[2
]}

Bertolucci, S. ^{[2
]}

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

Bloise, C. ^{[2
]}

Bocchetta, S. ^{[1
,11
]}

Bossi, F. ^{[2
]}

Branchini, P. ^{[11
]}

Capon, G. ^{[2
]}

Capussela, T. ^{[2
]}

Ceradini, F. ^{[1
,11
]}

Ciambrone, P. ^{[2
]}

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. ^{[1
,11
]}

Dreucci, M. ^{[2
]}

Felici, G. ^{[2
]}

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

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

Gatti, C. ^{[2
]}

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

Giovannella, S. ^{[2
]}

Graziani, E. ^{[11
]}

Jacewicz, M. ^{[2
]}

Lanfranchi, G. ^{[2
]}

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

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

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

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

Miscetti, S. ^{[2
]}

Moulson, M. ^{[2
]}

Mueller, S. ^{[3
]}

Murtas, F. ^{[2
]}

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

Nguyen, F. ^{[1
,11
]}

Palutan, M. ^{[2
]}

Pasqualucci, E. ^{[8
]}

Passeri, A. ^{[11
]}

Patera, V. ^{[2
,6
]}

Santangelo, P. ^{[2
]}

Sciascia, B. ^{[2
]}

机构：

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

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

[3] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-6500 Mainz, Germany

[4] Univ Naples Federico II, Dipartimento Sci Fisiche, 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, I-00185 Rome, Italy

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

[9] Univ Tor Vergata, Dipartimento Fis, Rome, Italy

[10] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, 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, CN-100039 Beijing, Peoples R China

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2009年 / 07期

关键词：

Phenomenological Models;

D O I：

10.1088/1126-6708/2009/07/105

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We update the values of the eta-eta' mixing angle and of the eta' gluonium content by fitting our measurement R-phi = BR(phi -> eta gamma)/BR(phi -> eta gamma) together with several vector meson radiative decays to pseudoscalars (V -> P gamma), pseudoscalar mesons radiative decays to vectors (P -> V gamma) and the eta' -> gamma gamma, pi(0) -> gamma gamma widths. From the fit we extract a gluonium fraction of Z(G)(2) = 0.12 +/- 0.04, the pseudoscalar mixing angle psi(P) = (40.4 +/- 0.6)degrees and the phi - omega mixing angle psi(V) = (3.32 +/- 0.09)degrees. Z(G)(2) and psi(P) are fairly consistent with those previously published. We also evaluate the impact on the eta' gluonium content determination of future experimental improvements of the eta' branching ratios and decay width.

引用

页数：15

共 21 条

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