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33. New Class of Two-Loop Neutrino Mass Models with Distinguishable Phenomenology

Author

Cao, Qing-Hong, Chen, Shao-Long, Ma, Ernest, Yan, Bin, and Zhang, Dong-Ming

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We discuss a new class of neutrino mass models generated in two loops, and explore specifically three new physics scenarios: (A) doubly charged scalar, (B) dark matter, and (C) leptoquark and diquark, which are verifiable at the 14 TeV LHC Run-II. We point out how the different Higgs insertions will distinguish our two-loop topology with others if the new particles in the loop are in the simplest representations of the SM gauge group.

Published
2017
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36. Collider Phenomenology of the 3-3-1 Model

Author

Cao, Qing-Hong and Zhang, Dong-Ming

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We study collider phenomenology of the so-called 331 model with $SU(3)_C\otimes SU(3)_L\otimes U(1)_X$ gauge structure at the large hadron collider, including single and double Higgs boson productions, Higgs boson rare decay, $Z^\prime$ boson production, new charged gauge boson pair production, and heavy quark pair production. We discuss all the possible collider signatures of new particle productions. Four benchmark 331 models, $\beta=\pm \sqrt{3}$ and $\beta=\pm 1/\sqrt{3}$, are studied in this work.

Published
2016

37. Double Higgs production at the 14 TeV LHC and the 100 TeV pp-collider

Author

Cao, Qing-Hong, Li, Gang, Yan, Bin, Zhang, Dong-Ming, and Zhang, Hao

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We consider effective Higgs boson couplings, including both the CP-even and CP-odd couplings, that affect Higgs boson pair production in this study. Through the partial wave analysis, we find that the process $gg\to hh$ is dominated by the $s$-wave component even at a 100~TeV $pp$-collider. Making use of the $s$-wave kinematics, we propose a cut efficiency function to mimic the collider simulation and obtain the potential of measuring Higgs effective couplings at the 14~TeV LHC with an integrated luminosity of $3000~{\rm fb}^{-1}$ and at a 100 TeV $pp$-collider. Analytical expressions of the $2\sigma$ exclusion limits at the LHC and the $5\sigma$ discovery bands at the 100 TeV machine are given.

Published
2016
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42. Effects of dietary Bacillus velezensis LSG2-5 on digestion, intestinal morphology, microflora, and related gene expression in Rhynchocypris lagowskii Dybowski

Author

Li, Shao-hua, primary, Zhang, Yu-rou, additional, Lin, Li-li, additional, Zhang, Dong-ming, additional, Zhang, Tian-yi, additional, Zhu, Wen-li, additional, Jiang, Dan, additional, Li, Yuxin, additional, Wang, Sibu, additional, Wang, Xin, additional, Wang, Qiu-ju, additional, and Chen, Yu-ke, additional

Published
2024
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46. The Diphoton Excess, Low Energy Theorem and the 331 Model

Author

Cao, Qing-Hong, Liu, Yandong, Xie, Ke-Pan, Yan, Bin, and Zhang, Dong-Ming

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We interpret the diphoton anomaly as a heavy scalar $H_3$ in the so-called 331 model. The scalar is responsible for breaking the $SU(3)_C\otimes SU(3)_L\otimes U(1)_X$ gauge symmetry down to the standard model electroweak gauge group. It mainly couples to the standard model gluons and photons through quantum loops involving heavy quarks and leptons. Those quarks and leptons, in together with the SM quarks and leptons, form the fundamental representation of the 331 model. We use low energy theorem to calculate effective coupling of $H_3gg$, $H_3\gamma\gamma$, $H_3ZZ$, $H_3WW$ and $H_3Z\gamma$. The analytical results can be applied to new physics models satisfying the low energy theorem. We show that the heavy quark and lepton contribution cannot produce enough diphoton pairs. It is crucial to include the contribution of charged scalars to explain the diphoton excess. The extra neutral $Z^\prime$ boson could also explain the 2 TeV diboson excess observed at the LHC Run-I., Comment: To appear in PRD

Published
2015
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47. A Boost Test of Anomalous Diphoton Resonance at the LHC

Author

Cao, Qing-Hong, Liu, Yandong, Xie, Ke-Pan, Yan, Bin, and Zhang, Dong-Ming

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

The recently observed diphoton resonance around 750~GeV at the LHC Run-2 could be interpreted as a weak singlet scalar. The scalar might also decay into a pair of $Z$-boson and photon. The $Z$-boson is highly boosted and appears as a fat jet in the detector. We use the jet substructure method to explore the possibility of discovering the singlet scalar in the process of $pp\to S\to Z\gamma$ in the future LHC experiment., Comment: Boosted Z+gamma mode added; more realistic backgrounds considered; references updated

Published
2015

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