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	Measurement of the tau michel parameters (eta)over-bar and xi kappa in the radiative leptonic decay tau(-) -> l(-)nu(tau)(nu)over-bar(l)gamma
	Shimizu, N.1; Aihara, H.1; Epifanov, D.2,3; Adachi, I.4,5; Al Said, S.6,7; Asner, D. M.8; Aulchenko, V.2,3; Aushev, T.9; Ayad, R.6; Babu, V.10
刊名	Progress of theoretical and experimental physics
	2018-02-01
期号	2页码:26
ISSN号	2050-3911
DOI	10.1093/ptep/pty003
通讯作者	Shimizu, n.()
英文摘要	We present a measurement of the michel parameters of the tau lepton, (eta) over bar and xi kappa, in the radiative leptonic decay tau(-) -> l(-)nu(tau)(nu) over bar (l)gamma using 711 fb(-1) of collision data collected with the belle detector at the kekb e(+)e(-) collider. the michel parameters are measured in an unbinned maximum likelihood fit to the kinematic distribution of e(+)e(-) -> tau(+)tau(-) -> (pi(+)pi(0)(nu) over bar (tau))(l(-)nu(tau)(nu) over bar (l)gamma) (l = e or mu). the measured values of the michel parameters are (eta) over bar = - 1.3 +/- 1.5 +/- 0.8 and xi kappa = 0.5 +/- 0.4 +/- 0.2, where the first error is statistical and the second is systematic. this is the first measurement of these parameters. these results are consistent with the standard model predictions within their uncertainties, and constrain the coupling constants of the generalized weak interaction.
WOS关键词	MU-MESON DECAY ; BELLE DETECTOR ; IDENTIFICATION ; ANNIHILATION ; LIBRARY ; TRIGGER ; KEKB
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary ; Physics, Particles & Fields
语种	英语
出版者	OXFORD UNIV PRESS INC
WOS记录号	WOS:000427011100011
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2178219
专题	高能物理研究所
通讯作者	Shimizu, N.
作者单位	1.Univ Tokyo, Dept Phys, Tokyo 1130033, Japan 2.RAS, Budker Inst Nucl Phys, SB, Novosibirsk 630090, Russia 3.Novosibirsk State Univ, Novosibirsk 630090, Russia 4.High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan 5.SOKENDAI Grad Univ Adv Studies, Hayama 2400193, Japan 6.Univ Tabuk, Dept Phys, Fac Sci, Tabuk 71451, Saudi Arabia 7.King Abdulaziz Univ, Dept Phys, Fac Sci, Jeddah 21589, Saudi Arabia 8.Pacific Northwest Natl Lab, Richland, WA 99352 USA 9.Moscow Inst Phys & Technol, Moscow 141700, Moscow Region, Russia 10.Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
推荐引用方式 GB/T 7714	Shimizu, N.,Aihara, H.,Epifanov, D.,et al. Measurement of the tau michel parameters (eta)over-bar and xi kappa in the radiative leptonic decay tau(-) -> l(-)nu(tau)(nu)over-bar(l)gamma[J]. Progress of theoretical and experimental physics,2018(2):26.
APA	Shimizu, N..,Aihara, H..,Epifanov, D..,Adachi, I..,Al Said, S..,...&Zupanc, A..(2018).Measurement of the tau michel parameters (eta)over-bar and xi kappa in the radiative leptonic decay tau(-) -> l(-)nu(tau)(nu)over-bar(l)gamma.Progress of theoretical and experimental physics(2),26.
MLA	Shimizu, N.,et al."Measurement of the tau michel parameters (eta)over-bar and xi kappa in the radiative leptonic decay tau(-) -> l(-)nu(tau)(nu)over-bar(l)gamma".Progress of theoretical and experimental physics .2(2018):26.

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