Improved measurement of the triple gauge-boson couplings gamma WW and ZWW in e(+)e(-) collisions

	Improved measurement of the triple gauge-boson couplings gamma WW and ZWW in e(+)e(-) collisions
	ALEPH Collaboration
刊名	PHYSICS LETTERS B
	2005
卷号	614 期号:1-2 页码:7-26
通讯作者	Schael, S (reprint author), Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany.
英文摘要	Triple gauge-boson couplings gamma WW and ZWW involving single-photon, single-W and W-pair production are determined using data samples collected at LEP with the ALEPH detector at centre-of-mass energies between 183 and 209 GeV The integrated luminosity used is 700 pb(-1) for the single-photon measurement and 683 pb-1 for the W channels. Restricting the measurement to C- and P-conserving terms and applying local SU(2)(L) x U(1)(Y) gauge invariance, the measured values of the parameters g(1)(Z), kappa(gamma) and lambda(gamma) are: g(1)(Z) = 1.001 +/- 0.027(stat) +/- 0.013(syst), kappa(gamma) = 0.971 +/- 0.055(stat) +/- 0.030(syst), lambda(gamma) = -0.012 +/- 0.027(stat) +/- 0.011(syst) for single-parameter fits, where the two other parameters are fixed to their Standard Model values. Results are also presented for the cases where two or all three couplings are allowed to vary. An additional analysis using W-pair events is performed to measure the unconstrained real and imaginary parts of all 14 triple gauge-boson couplings and to perform an indirect search for a techni-p resonance. No deviations from the Standard Model expectations are observed and the lower limit on the techni-p mass is set to 600 GeV/c(2) at 95% confidence level. (c) 2005 Elsevier B.V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
WOS记录号	WOS:000229049500002
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225464]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	ALEPH Collaboration. Improved measurement of the triple gauge-boson couplings gamma WW and ZWW in e(+)e(-) collisions[J]. PHYSICS LETTERS B,2005,614(1-2):7-26.
APA	ALEPH Collaboration.(2005).Improved measurement of the triple gauge-boson couplings gamma WW and ZWW in e(+)e(-) collisions.PHYSICS LETTERS B,614(1-2),7-26.
MLA	ALEPH Collaboration."Improved measurement of the triple gauge-boson couplings gamma WW and ZWW in e(+)e(-) collisions".PHYSICS LETTERS B 614.1-2(2005):7-26.