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题名: LHC phenomenology of the type II seesaw mechanism: Nondegenerate case
作者: Han, ZL;  Ding, R;  Liao, Y
刊名: PHYSICAL REVIEW D
出版日期: 2015
卷号: 91, 期号:9, 页码:93006
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.91.093006
通讯作者: Han, ZL (reprint author), Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China.
文章类型: Article
英文摘要: In this paper, we thoroughly investigate the LHC phenomenology of the type II seesaw mechanism for neutrino masses in the nondegenerate case where the triplet scalars of various charge ( H-+/-+/-, H-+/-, H-0, A(0)) have different masses. Compared with the degenerate case, the cascade decays of scalars lead to many new, interesting signal channels. In the positive scenario where M-H +/-+/- < M-H +/- < M-H0/A0, the four- lepton signal is still the most promising discovery channel for the doubly charged scalars H-+/-+/-. The five- lepton signal is crucial to probe the mass spectrum of the scalars, for which, for example, a 5 sigma reach at 14 TeV LHC for M-H +/- = 430 GeV with M-H +/-+/- = 400 GeV requires an integrated luminosity of 76 fb(-1). And the six- lepton signal can be used to probe the neutral scalars H-0/A(0), which are usually hard to detect in the degenerate case. In the negative scenario where M-H +/-+/- > M-H +/- > M-H0/A0, the detection of H-+/-+/- is more challenging, when the cascade decay H-+/-+/- -> (HW +/-)-W-+/-* is dominant. The most important channel is the associated (HH0)-H-+/-/A(0) production in the final state l(+/-)is not an element of(T)b (b) over barb (b) over bar, which requires a luminosity of 109 fb(-1) for a 5 sigma discovery, while the final state l(+/-)is not an element of(T)b (b) over bar tau(+)tau(-) is less promising. Moreover, the associated H(0)A(0) production can give the same signals as the standard model Higgs pair production. With a much larger cross section, the H(0)A(0) production in the final state b (b) over bar tau(+)tau(-) could reach 3 sigma significance at 14 TeV LHC with a luminosity of 300 fb(-1). In summary, with an integrated luminosity similar to O(500 fb(-1)), the triplet scalars can be fully reconstructed at 14 TeV LHC in the negative scenario.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: MAJORANA NEUTRINO MASSES ;  CHARGED HIGGS BOSONS ;  LEFT-RIGHT SYMMETRY ;  PAIR PRODUCTION ;  ROOT-S=7 TEV ;  FINAL-STATES ;  SEARCH ;  PARITY ;  SCALE ;  VIOLATION
收录类别: SCI
项目资助者: CAS Center for Excellence in Particle Physics (CCEPP) ;  [NSFC-11025525]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21000
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Recommended Citation:
Han, ZL,Ding, R,Liao, Y. LHC phenomenology of the type II seesaw mechanism: Nondegenerate case[J]. PHYSICAL REVIEW D,2015,91(9):93006.
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