Searching for a heavy Higgs boson in a Higgs-portal B - L model

被引：20

作者：

Banerjee, Shankha ^{[1
]}

Mitra, Manimala ^{[2
]}

Spannowsky, Michael ^{[3
]}

机构：

[1] Harish Chandra Res Inst, Reg Ctr Accelerator Based Particle Phys, Allahabad 211019, Uttar Pradesh, India

[2] Indian Inst Sci Educ & Res Mohali, Knowledge City, Punjab, India

[3] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE, England

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 05期

关键词：

NEUTRINO MASSES; STANDARD MODEL; MAJORANA NEUTRINOS; PROTON COLLISIONS; L SYMMETRY; COUPLINGS; EXTENSION; BREAKING; LEPTON; SCALE;

D O I：

10.1103/PhysRevD.92.055013

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the discovery prospects of a heavy neutral scalar arising from a U(1)(B-L) extension of the Standard Model (SM) during the Large Hadron Collider's high luminosity runs (HL-LHC). This heavy neutral scalar mixes with the SM Higgs boson through a Higgs portal and interacts with the SM particles with an interaction strength proportional to the sine of the mixing angle. The mixing between the two Higgs bosons is constrained by direct and indirect measurements. We choose an experimentally viable mixing angle and explore in detail the ZZ and WW decay modes of the heavy Higgs boson. For the ZZ case, we focus on the cleanest 4l and 2l2j final states and find that a heavy Higgs boson of mass smaller than 500 GeV can be discovered at the HL-LHC. For the WW decay mode, we analyze the ljj is not an element of(T) signature. We implement novel background reduction techniques in order to tackle the huge background by performing both cut-based and multivariate analyses. However, large backgrounds render this channel challenging. We briefly discuss the discovery prospects of the heavy Z'-boson arising in this model.

引用

页数：22

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