Testing the realistic seesaw model with two heavy Majorana neutrinos at the CERN Large Hadron Collider

	Testing the realistic seesaw model with two heavy Majorana neutrinos at the CERN Large Hadron Collider
	Chao W(晁伟); Chao, W; Si, ZG; Zheng, YJ; Zhou, S; Zhou S(周顺)
刊名	PHYSICS LETTERS B
	2010
卷号	683 期号:1 页码:#REF!
通讯作者	Zhou, S (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
英文摘要	In the conventional type-(I+II) seesaw model, the effective mass matrix of three known light neutrinos is given by M(v) = M(L) - M(D)M(R)(-1)M(D)(T) in the leading-order approximation. We propose an intriguing scenario, in which the structural cancellation condition M(D)M(R)(-1)M(D)(T) = 0 is guaranteed by the A(4) x Z(2) flavor symmetry. As a consequence, neutrino masses are mainly generated by the Higgs triplet M(v) = M(L), while the neutrino mixing matrix is non-unitary and takes on the nearly tri-bimaximal pattern. A discriminating feature of this scenario from the pure type-II seesaw model is that the lepton-number-violating signatures induced by the heavy Majorana neutrinos can be discovered at the CERN Large Hadron Collider. We calculate the total cross section of the same-sign dilepton events pp -> l(alpha)(+/-)N(i) -> l(alpha)(+/-)l(beta)(+/-)jj (for i = 1, 2 and alpha, beta = e, mu, tau), and emphasize the significant interference of the contributions from two different heavy Majorana neutrinos. The background from the standard model and the kinematic cuts used to reduce it have been considered. The possible way to distinguish between the signals from heavy Majorana neutrinos and those from doubly-charged Higgs bosons is briefly discussed. (C) 2009 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:000274129600006
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225584]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Chao W,Chao, W,Si, ZG,et al. Testing the realistic seesaw model with two heavy Majorana neutrinos at the CERN Large Hadron Collider[J]. PHYSICS LETTERS B,2010,683(1):#REF!.
APA	晁伟,Chao, W,Si, ZG,Zheng, YJ,Zhou, S,&周顺.(2010).Testing the realistic seesaw model with two heavy Majorana neutrinos at the CERN Large Hadron Collider.PHYSICS LETTERS B,683(1),#REF!.
MLA	晁伟,et al."Testing the realistic seesaw model with two heavy Majorana neutrinos at the CERN Large Hadron Collider".PHYSICS LETTERS B 683.1(2010):#REF!.