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	Measurement of gamma(phi ->eta 'gamma)/gamma(phi ->eta gamma) and the pseudoscalar mixing angle
	Aloisio, A; Ambrosino, F; Antonelli, A; Antonelli, M; Bacci, C; Bencivenni, G; Bertolucci, S; Bini, C; Bloise, C; Bocci, V
刊名	Physics letters b
	2002-08-08
卷号	541期号:1-2页码:45-51
关键词	E(+)e(-) collisions Phi radiative decays Pseudoscalar mixing angle
ISSN号	0370-2693
通讯作者	Ambrosino, f()
英文摘要	We have measured the radiative decays phi --> etagamma, phi --> eta'gamma selecting pi(+)pi(-)gammagammagamma final state in a sample of similar to 5 x 10(7) phi-mesons produced at the frascati phi-factory daphine. we obtain gamma(phi --> eta'gamma)/gamma(phi --> etagamma) = (4.70 +/- 0.47 +/- 0.31) x 10(-3). from this result we derive new accurate values for the branching ratio br(phi --> eta'gamma) = (6.10 +/- 0.61 +/- 0.43) x 10(-5) and the mixing angle of pseudoscalar mesons in the flavour basis phi(p) = (41.8(-1.6)(+1.9))degrees. (c) 2002 elsevier science b.v. all rights reserved.
WOS关键词	PHENOMENOLOGICAL EVIDENCE ; B-DECAYS ; ETA' ; MESONS ; PHI->ETA'GAMMA ; CMD-2
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:000177500700007
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2176361
专题	高能物理研究所
通讯作者	Ambrosino, F
作者单位	1.Univ Naples Federico II, Dipartimento Sci Fis, Naples, Italy 2.Ist Nazl Fis Nucl, I-80125 Naples, Italy 3.Univ Bari, Dipartimento Fis, Bari, Italy 4.Ist Nazl Fis Nucl, I-70126 Bari, Italy 5.Univ Virginia, Dept Phys, Charlottesville, VA 22903 USA 6.Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy 7.Univ Karlsruhe, Inst Expt Kernphys, Karlsruhe, Germany 8.Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy 9.Ist Nazl Fis Nucl, I-73100 Lecce, Italy 10.Univ Roma La Sapienza, Dipartimento Energet, Rome, Italy
推荐引用方式 GB/T 7714	Aloisio, A,Ambrosino, F,Antonelli, A,et al. Measurement of gamma(phi ->eta 'gamma)/gamma(phi ->eta gamma) and the pseudoscalar mixing angle[J]. Physics letters b,2002,541(1-2):45-51.
APA	Aloisio, A.,Ambrosino, F.,Antonelli, A.,Antonelli, M.,Bacci, C.,...&Yu, Y.(2002).Measurement of gamma(phi ->eta 'gamma)/gamma(phi ->eta gamma) and the pseudoscalar mixing angle.Physics letters b,541(1-2),45-51.
MLA	Aloisio, A,et al."Measurement of gamma(phi ->eta 'gamma)/gamma(phi ->eta gamma) and the pseudoscalar mixing angle".Physics letters b 541.1-2(2002):45-51.

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