Composition of the pseudoscalar η and η′ mesons

被引：1

作者：

Thomas, Christopher E. ^{[1
]}

机构：

[1] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2007年 / 10期

关键词：

phenomenological models; QCD;

D O I：

暂无

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：

The composition of the eta and eta ' mesons has long been a source of discussion and is of current interest with new experimental results appearing. We investigate what can be learnt from a number of different processes: V -> P gamma and P -> V gamma (V and P are light vector and pseudoscalar mesons respectively), P -> gamma gamma, J/psi, psi ' -> P gamma, J/psi, psi ' -> PV, and chi(c0,2) -> PP. These constrain the eta - eta ' mixing angle to a consistent value, phi approximate to 42 degrees; we find that the cc components are less than or similar to 5% in amplitude. We also find that, while the data hint at a small gluonic component in the eta ', the conclusions depend sensitively on unknown form factors associated with exclusive dynamics. In addition, we predict BR(psi ' -> eta 'gamma) approximate to 1 X 10(-5) and BR(chi(c0) -> eta eta ') approximate to 2 X 10(-5) -1 X 10(-4). We provide a method to test the mixing using chi(c2) -> eta eta, eta 'eta ' and eta eta ' modes and make some general observations on chi(c0,2) decays. We also survey the semileptonic and hadronic decays of bottom and charmed mesons and find some modes where the mixing angle can be extracted cleanly with the current experimental data, some where more data will allow this, and some where a more detailed knowledge of the different amplitudes is required.

引用

页数：49

共 123 条

[1] Study of the e+e-→ηγ process with Spherical Neutral Detector at the VEPP-2M e+e- collider [J].

Achasov, M. N. ;

Aulchenko, V. M. ;

Beloborodov, K. I. ;

Berdyugin, A. V. ;

Bogdanchikov, A. G. ;

Bozhenok, A. V. ;

Bukin, D. A. ;

Dimova, T. V. ;

Druzhinin, V. P. ;

Golubev, V. B. ;

Korol, A. A. ;

Koshuba, S. V. ;

Otboev, A. V. ;

Pakhtusova, E. V. ;

Serednyakov, S. I. ;

Shatunov, Yu. M. ;

Sidorov, V. A. ;

Silagadze, Z. K. ;

Skrinsky, A. N. ;

Vasiljev, A. V. .

PHYSICAL REVIEW D, 2006, 74 (01)

[2] χc0 and χc2 decays into ηη, ηη′, and η′η′ final states [J].

Adams, G. S. ;

Anderson, M. ;

Cummings, J. P. ;

Danko, I. ;

Napolitano, J. ;

He, Q. ;

Insler, J. ;

Muramatsu, H. ;

Park, C. S. ;

Thorndike, E. H. ;

Yang, F. ;

Coan, T. E. ;

Gao, Y. S. ;

Artuso, M. ;

Blusk, S. ;

Butt, J. ;

Li, J. ;

Menaa, N. ;

Mountain, R. ;

Nisar, S. ;

Randrianarivony, K. ;

Sia, R. ;

Skwarnicki, T. ;

Stone, S. ;

Wang, J. C. ;

Zhang, K. ;

Csorna, S. E. ;

Bonvicini, G. ;

Cinabro, D. ;

Dubrovin, M. ;

Lincoln, A. ;

Asner, D. M. ;

Edwards, K. W. ;

Briere, R. A. ;

Chen, J. ;

Ferguson, T. ;

Tatishvili, G. ;

Vogel, H. ;

Watkins, M. E. ;

Rosner, J. L. ;

Adam, N. E. ;

Alexander, J. P. ;

Berkelman, K. ;

Cassel, D. G. ;

Duboscq, J. E. ;

Ecklund, K. M. ;

Ehrlich, R. ;

Fields, L. ;

Galik, R. S. ;

Gibbons, L. .

PHYSICAL REVIEW D, 2007, 75 (07)

[3]

ADAMS GS, ARXIV07080139

[4] Gluon content of the η and η′ mesons and the ηγ, η′γ electromagnetic transition form factors -: art. no. 054020 [J].

Agaev, SS ;

Stefanis, NG .

PHYSICAL REVIEW D, 2004, 70 (05) :054020-1

[5]

Ahmady MR, 1998, PHYS REV D, V58, DOI 10.1103/PhysRevD.58.014015

[6] B→η(′)(l-νl,l+l-,K,K*) decays in the quark-flavor mixing scheme [J].

Akeroyd, A. G. ;

Chen, Chuan-Hung ;

Geng, Chao-Qiang .

PHYSICAL REVIEW D, 2007, 75 (05)

[7] Contribution of b→sgg through the QCD anomaly in exclusive decays B+/-→(η′,η)(K+/-,K*+/-)and B0→(η′,η)(K0,K*0) [J].

Ali, A ;

Chay, J ;

Greub, C ;

Ko, P .

PHYSICS LETTERS B, 1998, 424 (1-2) :161-174

[8] Semileptonic B→ηιν decay in light cone QCD -: art. no. 094009 [J].

Aliev, TM ;

Kanik, I ;

Özpineci, A .

PHYSICAL REVIEW D, 2003, 67 (09)

[9]

Aliev TM, 2003, EUR PHYS J C, V29, P515, DOI 10.1140/epjc/s2003-01242-1

[10] Measurement of the pseudoscalar mixing angle and η′ gluonium content with the KLOE detector [J].

Ambrosino, F. ;

Antonelli, A. ;

Antonelli, M. ;

Bacci, C. ;

Beltrame, P. ;

Bencivenni, G. ;

Bertolucci, S. ;

Bini, C. ;

Bloise, C. ;

Bocchetta, S. ;

Bocci, V. ;

Bossi, F. ;

Bowring, D. ;

Branchini, P. ;

Caloi, R. ;

Campana, P. ;

Capon, G. ;

Capussela, T. ;

Ceradini, F. ;

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, M. ;

Felici, G. ;

Ferrari, A. ;

Ferrer, M. L. ;

Finocchiaro, G. ;

Fiore, S. ;

Forti, C. ;

Franzini, P. ;

Gatti, C. ;

Gauzzi, P. ;

Giovannella, S. ;

Gorini, E. ;

Graziani, E. ;

Incagli, M. ;

Kluge, W. ;

Kulikov, V. .

PHYSICS LETTERS B, 2007, 648 (04) :267-273

← 1 2 3 4 5 6 7 8 9 10 →