1.

Scrutinizing righthanded neutrino portal dark matter with Yukawa effect
/ Bandyopadhyay, Priyotosh ; Chun, Eung Jin ; Mandal, Rusa ; Queiroz, Farinaldo S.
Analyzing the neutrino Yukawa effect in the freezeout process of a generic dark matter candidate with righthanded neutrino portal, we identify the parameter regions satisfying the observed dark matter relic density as well as the current FermiLAT and H.E.S.S. [...]
Published in Physics letters B 788 (2019) 530534
10.1016/j.physletb.2018.12.003
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2.

Reconstructing heavy Higgs boson masses in a type X twoHiggsdoublet model with a light pseudoscalar particle
/ Chun, Eung Jin ; Dwivedi, Siddharth ; Mondal, Tanmoy ; Mukhopadhyaya, Biswarup ; et al
We analyze the prospects of reconstructing the mass of a heavy charged Higgs boson in the context of a type X twoHiggsdoublet model where a light pseudoscalar $A$ in the mass range 40–60 GeV is phenomenologically allowed, and is in fact favored if one wants to explain the muon anomalous magnetic moment. [...]
Published in Physical Review D 98 (2018)
10.1103/PhysRevD.98.075008
arXiv:1807.05379
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3.

Scalar dark matter in leptophilic twoHiggsdoublet model
/ Bandyopadhyay, Priyotosh ; Chun, Eung Jin ; Mandal, Rusa
TwoHiggsDoublet Model of TypeX in the large tanβ limit becomes leptophilic to allow a light pseudoscalar A and thus provides an explanation of the muon g−2 anomaly. [...]
Published in Physics letters B (2018)
10.1016/j.physletb.2018.01.071
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4.

Implications of righthanded neutrinos in $BL$ extended standard model with scalar dark matter
/ Bandyopadhyay, Priyotosh ; Chun, Eung Jin ; Mandal, Rusa
We investigate the standard model (SM) with a $U(1{)}_{BL}$ gauge extension where a $BL$ charged scalar is a viable dark matter (DM) candidate. [...]
Published in Phys. Rev. D 97 (2018)
10.1103/PhysRevD.97.015001
arXiv:1707.00874
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5.

Accidental Peccei–Quinn symmetry from discrete flavour symmetry and Pati–Salam
/ Björkeroth, Fredrik ; Chun, Eung Jin ; King, Stephen F.
We show how an accidental U(1) Peccei–Quinn (PQ) symmetry can arise from a discrete A4 family symmetry combined with a discrete flavour symmetry Z3×Z52 , in a realistic Pati–Salam unified theory of flavour. [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.12.058
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6.

Reconstructing a light pseudoscalar in the TypeX two Higgs doublet model
/ Chun, Eung Jin ; Dwivedi, Siddharth ; Mondal, Tanmoy ; Mukhopadhyaya, Biswarup
We investigate the detectability as well as reconstructibility of a light pseudoscalar particle A , of mass in the 50–60 GeV range, which is still allowed in a TypeX (leptonspecific) twoHiggs doublet scenario. [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.09.037
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7.

Minimal models for axion and neutrino
/ Ahn, Y.H. ; Chun, Eung Jin
The PQ mechanism resolving the strong CP problem and the seesaw mechanism explaining the smallness of neutrino masses may be related in a way that the PQ symmetry breaking scale and the seesaw scale arise from a common origin. [...]
Published in Physics letters B (2015)
10.1016/j.physletb.2015.11.067
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8.

ElectroWeak Dark Matter: Nonperturbative effect confronting indirect detections
/ Chun, Eung Jin ; Park, JongChul
We update indirect constraints on ElectroWeak Dark Matter (EWDM) considering the Sommerfeld–Ramsauer–Townsend (SRT) effect for its annihilations into a pair of standard model gauge bosons assuming that EWDM accounts for the observed dark matter (DM) relic density for a given DM mass and mass gaps among the multiplet components. [...]
Published in Physics letters B (2015)
10.1016/j.physletb.2015.09.046
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9.

Diluting the inflationary axion fluctuation by a stronger QCD in the early Universe
/ Choi, Kiwoon ; Chun, Eung Jin ; Im, Sang Hui ; Jeong, Kwang Sik
We propose a new mechanism to suppress the axion isocurvature perturbation, while producing the right amount of axion dark matter, within the framework of supersymmetric axion models with the axion scale induced by supersymmetry breaking. [...]
Published in Physics letters B (2015)
10.1016/j.physletb.2015.08.041
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10.

Anatomy of Higgs mass in supersymmetric inverse seesaw models
/ Chun, Eung Jin ; Mummidi, V. Suryanarayana ; Vempati, Sudhir K.
We compute the one loop corrections to the CPeven Higgs mass matrix in the supersymmetric inverse seesaw model to single out the different cases where the radiative corrections from the neutrino sector could become important. [...]
Published in Physics letters B 736 (2014) 470477
10.1016/j.physletb.2014.08.002
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