1.

Spontaneous Breaking of Lepton Number and the Cosmological Domain Wall Problem
/ Lazarides, George ; Reig, Mario ; Shafi, Qaisar ; Srivastava, Rahul ; et al
We show that if global lepton number symmetry is spontaneously broken in a postinflation epoch, then it can lead to the formation of cosmological domain walls. [...]
Published in Physical Review Letters 122 (2019)
10.1103/PhysRevLett.122.151301

2.

Light sterile neutrino and low scale leftright symmetry in a Dbrane inspired $SU(4{)}_{C}\times SU(2{)}_{L}\times SU(2{)}_{R}$ model
/ Leontaris, George K. ; Shafi, Qaisar
Motivated by the ongoing searches for new physics at the LHC, we explore the low energy consequences of a Dbrane inspired $SU(4{)}_{C}\times SU(2{)}_{L}\times SU(2{)}_{R}$ (422) model. [...]
Published in Physical Review D 99 (2019)
10.1103/PhysRevD.99.035032
arXiv:1811.12647
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3.

Gravity waves and gravitino dark matter in μ hybrid inflation
/ Okada, Nobuchika ; Shafi, Qaisar
We propose a novel reformulation of supersymmetric (more precisely μ ) hybrid inflation based on a local U(1) or any suitable extension of the minimal supersymmetric standard model (MSSM) which also resolves the μ problem. [...]
Published in Physics letters B 787 (2018) 141145
10.1016/j.physletb.2018.10.057
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4.

Type II seesaw mechanism with scalar dark matter in light of AMS02, DAMPE, and FermiLAT data
/ Li, Tong ; Okada, Nobuchika ; Shafi, Qaisar
The standard model (SM) supplemented by type II seesaw and a SM gaugesinglet scalar dark matter (DM) is a very simple framework to incorporate the observed neutrino oscillations and provide a plausible DM candidate. [...]
Published in Physical Review D 98 (2018)
10.1103/PhysRevD.98.055002
arXiv:1804.09835
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5.

Leptonic $CP$ violation and leptogenesis in minimal supersymmetric $\mathrm{SU}(4{)}_{c}\times \mathrm{SU}(2{)}_{L}\times \mathrm{SU}(2{)}_{R}$
/ Okada, Nobuchika ; Shafi, Qaisar
We consider a supersymmetric ${\mathrm{SU}\left(4\right)}_{c}\times {\mathrm{SU}\left(2\right)}_{L}\times \mathrm{SU}(2{)}_{R}$ model with a minimal number of Higgs multiplets and Dirac and Majorana $CP$violating phases in the neutrino flavor mixing matrix. [...]
Published in Physical Review D 98 (2018)
10.1103/PhysRevD.98.035044
arXiv:1109.4963
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6.

Inducedgravity GUTscale Higgs inflation in supergravity
/ Pallis, Constantinos ; Shafi, Qaisar
Models of inducedgravity inflation are formulated within Supergravity employing as inflaton the Higgs field which leads to a spontaneous breaking of a U(1)BL symmetry at MGUT=2·1016GeV . [...]
Published in EPJC 78 (2018) 523
10.1140/epjc/s1005201859800
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7.

Gravity waves and proton decay in a flipped SU(5) hybrid inflation model
/ Rehman, Mansoor Ur ; Shafi, Qaisar ; Zubair, Umer
We revisit supersymmetric hybrid inflation in the context of the flipped $SU\left(5\right)$ model. [...]
Published in Physical Review D 97 (2018)
10.1103/PhysRevD.97.123522
arXiv:1804.02493
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8.

Axion inflation, proton decay, and leptogenesis in $SU\left(5\right)\times U(1{)}_{PQ}$
/ Boucenna, Sofiane M. ; Shafi, Qaisar
We implement inflation in a nonsupersymmetric $SU\left(5\right)$ model based on a nonminimal coupling of the axion field to gravity. [...]
Published in Physical Review D 97 (2018)
10.1103/PhysRevD.97.075012
arXiv:1712.06526
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9.

Scalar dark matter, type II seesaw and the DAMPE cosmic ray e + + e − excess
/ Li, Tong ; Okada, Nobuchika ; Shafi, Qaisar
The DArk Matter Particle Explorer (DAMPE) has reported a measurement of the flux of high energy cosmic ray electrons plus positrons (CREs) in the energy range between 25GeV and 4.6TeV . [...]
Published in Physics letters B (2018)
10.1016/j.physletb.2018.02.006
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10.

Vectorlike particles, Z ′ and Yukawa unification in Ftheory inspired E 6
/ Karozas, Athanasios ; Leontaris, George K. ; Shafi, Qaisar
We explore the low energy implications of an Ftheory inspired E6 model whose breaking yields, in addition to the MSSM gauge symmetry, a Z′ gauge boson associated with a U(1) symmetry broken at the TeV scale. [...]
Published in Physics letters B (2018)
10.1016/j.physletb.2018.01.032
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