Measurement of the pseudoscalar mixing angle and eta ' gluonium content with the kloe detector
文献类型：期刊论文
| 作者 | Ambrosino, F.; Antonelli, A.; Antonelli, M.; Bacci, C.; Beltrame, P.; Bencivenni, G.; Bertolucci, S.; Bini, C.; Bloise, C.; Bocchetta, S. |
| 刊名 | Physics letters b
 |
| 出版日期 | 2007-05-10 |
| 卷号 | 648期号:4页码:267-273 |
| ISSN号 | 0370-2693 |
| 关键词 | E(+)e(-) Collisions Radiative phi decays Pseudoscalar mixing angle |
| DOI | 10.1016/j.physletb.2007.03.032 |
| 通讯作者 | Di donato, c.(camilla.didonato@na.infn.it) |
| 英文摘要 | We have measured the ratio r-phi = br(phi ->eta'gamma)/br phi ->eta gamma) by looking for the radiative decays phi ->eta'gamma and phi ->eta gamma into the final states pi(+)pi(-)7 gamma and 7 gamma, respectively, in a sample of similar to 1.4 x 10(9) phi mesons produced at the frascati phi factory. we obtain r phi = (4.77 +/- 0.09(stat) +/- 0.19(syst)) x 10(-3) from which we derive br(phi ->eta'gamma) = (6.20 +/- 0.11(stat) +/- 0.25(syst)) x 10(-5). assuming the eta' has zero gluonium content, we extract the pseudoscalar mixing angle in the quark-flavor basis, phi(p) = (41.4 +/- 0.3(stat) +/- 0.7(syst) +/- 0.6(th))degrees. combining the value of r-phi with other constraints, we estimate the fractional gluonium content of the eta' to be z(2) = 0.14 +/- 0.04 and the mixing angle to be phi(p) = (39.7 +/- 0.7)degrees. (c) 2007 elsevier b.v. all rights reserved. |
| WOS关键词 | DECAY ; MESONS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000246512500001 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2175844 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Di Donato, C. |
| 作者单位 | 1.Univ Naples Federico II, Dipartimento Sci Fisiche, Naples, Italy 2.Sez INFN, Naples, Italy 3.Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy 4.Univ Karlsruhe, Inst Expt Kernphys, Karlsruhe, Germany 5.Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy 6.Sez INFN, Lecce, Italy 7.Univ Pisa, Dipartimento Fis, Pisa, Italy 8.Sez INFN, Pisa, Italy 9.Univ Roma La Sapienza, Dipartimento Energet, Rome, Italy 10.Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy |
| 推荐引用方式 GB/T 7714 | Ambrosino, F.,Antonelli, A.,Antonelli, M.,et al. Measurement of the pseudoscalar mixing angle and eta ' gluonium content with the kloe detector[J]. Physics letters b,2007,648(4):267-273. |
| APA | Ambrosino, F..,Antonelli, A..,Antonelli, M..,Bacci, C..,Beltrame, P..,...&Xu, G..(2007).Measurement of the pseudoscalar mixing angle and eta ' gluonium content with the kloe detector.Physics letters b,648(4),267-273. |
| MLA | Ambrosino, F.,et al."Measurement of the pseudoscalar mixing angle and eta ' gluonium content with the kloe detector".Physics letters b 648.4(2007):267-273. |
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