45 citations · 275 across the 27 of their papers we have counts for
27 papers
Limitations of Freeze-in WIMP Dark Matter from Supercooled Phase Transitions
Seyed Yaser Ayazi, Mojtaba Hosseini
We revisit the possibility of producing Weakly Interacting Massive Particle (WIMP) dark matter via a freeze-in mechanism triggered by a supercooled first-order phase transition (FO…
Gravitational wave signatures of first-order phase transition in two-component dark matter model
Seyed Yaser Ayazi, Mojtaba Hosseini, Rouzbeh Rouzbehi
Here, we consider a classically scale-invariant extension of the Standard Model (SM) with two-component dark matter (DM) candidates, including a Dirac spinor and a scalar DM. We pr…
Gravitational wave in a filtered vector dark matter model
Mojtaba Hosseini, Seyed Yaser Ayazi, Ahmad Mohamadnejad
We consider a first order phase transition (FOPT) for a Vector Dark Matter (VDM) in the early universe in which its mass may partially arise from such mechanism in the hidden secto…
Vector dark matter and LHC constraints, including a 95 GeV light Higgs boson
Seyed Yaser Ayazi, Mojtaba Hosseini, Saeid Paktinat Mehdiabadi +1
We study LHC searches for an extension of the Standard Model (SM) by exploiting an additional Abelian gauge symmetry and a complex scalar Higgs portal. As the scalar is ch…
Gravitational wave effects and phenomenology of a two-component dark matter model
Mojtaba Hosseini, Seyed Yaser Ayazi, Ahmad Mohamadnejad
We study an extension of the Standard Model (SM) which could have two candidates for dark matter (DM) including a Dirac fermion and a vector dark matter (VDM) under a new ga…
W-boson mass anomaly and vacuum structure in vector dark matter model with a singlet scalar mediator
Seyed Yaser Ayazi, Mojtaba Hosseini
Motivated by the deviation of the W boson mass reported by the CDF collaboration, we study an extension of the Standard Model (SM) including a vector dark matter (VDM) candidate an…
Thermal Leptophilic Light Vector Dark Matter with Spinor Mediator and Muon (g-2) Anomaly
Seyed Yaser Ayazi, Ahmad Mohamadnejad
Inspired by the recently new measurement of at FermiLab and reported upper bound for electron-dark matter (DM) recoil by the XENON1T collaboration, we revisited phenomeno…
DAMPE Excess from Leptophilic Vector Dark Matter: Model Independent Approach
Seyed Yaser Ayazi, Ahmad Mohamadnejad
We study all extensions of the Standard Model (SM) with a vector dark matter (VDM) candidate which can explain the peak structure observed by recent DAMPE experiment in electron-po…
Conformal vector dark matter and strongly first-order electroweak phase transition
Seyed Yaser Ayazi, Ahmad Mohamadnejad
We study a conformal version of the Standard Model (SM), which apart from SM sector, containing a dark sector with a vector dark matter candidate and a scalar field (s…
Scale-Invariant Two Component Dark Matter
Seyed Yaser Ayazi, Ahmad Mohamadnejad
We study a scale invariant extension of the standard model which can explain simultaneously dark matter and the hierarchy problem. In our set-up, we introduce a scalar and a spinor…
Searching for Vector-Like Quarks in a Fermionic Dark Matter Model with Pseudoscalar: A Resonance Case
Seyed Yaser Ayazi, Ahmad Mohamadnejad, S. Peyman Zakeri
We propose a minimal model of a fermionic dark matter with a pseudoscalar mediator and N generation of vector-like quarks. We calculate the relic density and obtain new constraint…
A Minimal Model For Two-Component FIMP Dark Matter: A Basic Search
S. Peyman Zakeri, S. Mohammad Moosavi Nejad, Mohammadreza Zakeri +1
In the multi-component configurations of dark matter phenomenology, we propose a minimal two-component configuration which is an extension of the Standard Model with only three new…
The s-Channel Single Top Quark Production as a Constraint for Boson Contribution
Seyed Yaser Ayazi, Saeid Paktinat Mehdiabadi
An analysis is performed to constrain the boson production using the measurement of the s-channel single top quark production cross section. Both phenomenological and statisti…
Freeze-in production of Fermionic Dark Matter with Pseudo-scalar and Phenomenological Aspects
Seyed Yaser Ayazi, S. Mahdi Firouzabadi, S. Peyman Zakeri
In this paper, we study freeze-in production of fermionic dark matter with a pseudo scalar as the mediator between dark sector and Standard Model (SM). While the fermionic DM is no…
Footprint of Triplet Scalar Dark Matter in Direct, Indirect Search and Invisible Higgs Decay
Seyed Yaser Ayazi, S. Mahdi Firouzabadi
In this talk, we will review Inert Triplet Model (ITM) which provide candidate for dark matter (DM) particles. Then we study possible decays of Higgs boson to DM candidate and appl…
Constraining Inert Triplet Dark Matter by the LHC and FermiLAT
Seyed Yaser Ayazi, S. Mahdi Firouzabadi
We study collider phenomenology of inert triplet scalar dark matter at the LHC. We discuss possible decay of Higgs boson to dark matter candidate and apply current experimental dat…
Probing the top quark chromoelectric and chromomagnetic dipole moments in single top -channel at the LHC
Seyed Yaser Ayazi, Hoda Hesari, Mojtaba Mohammadi Najafabadi
We study the effects of chromoelectric and chromomagnetic dipole moments (CEDM and CMDM) on the production cross section of single top -channel at the LHC based on the effectiv…
Impact of Torsion Space-Time on observables at Hadron Colliders
Seyed Yaser Ayazi, Mojtaba Mohammadi Najafabadi
Starting from the effective torsion space-time model, we study its effects on the top pair production cross section at hadron colliders. We also study the effect of this model on t…
Top pair Asymmetries at Hadron colliders with general couplings
Seyed Yaser Ayazi
Recently it has been shown that measurement of charge asymmetry of top pair production at LHC excludes any flavor violating vector gauge boson that could explain Tevatron forw…
Top Quark Forward-Backward Asymmetry and -Boson with General Couplings
Seyed Yaser Ayazi, Sara Khatibi, Mojtaba Mohammadi Najafabadi
The measured forward-backward asymmetry in top pair events at the Fermilab Tevatron collider deviates significantly from the standard model expectation. Several models have been pr…
Single top quark production in -channel at the LHC in Noncommutative Space-Time
Seyed Yaser Ayazi, Sina Esmaeili, Mojtaba Mohammadi Najafabadi
We study the production cross section of the -channel single top quark at the LHC in the noncommutative space-time. It is shown that the deviation of the -channel single top…
Constraints on Randall-Sundrum model from top-antitop production at the LHC
Seyed Yaser Ayazi, Mojtaba Mohammadi Najafabadi
We study the top pair production cross section at the LHC in the context of Randall-Sundrum model including the Kaluza-Klein (KK) excited gravitons. It is shown that the recent mea…
The Impact of Kaluza-Klein Excited W Boson on the Single Top at LHC and Comparison with other Models
Seyed Yaser Ayazi, Mojtaba Mohammadi Najafabadi
We study the s-channel single top quark production at the LHC in the context of extra dimension theories, including the Kaluza-Klein (KK) decomposition. It is shown that the presen…
A Window on the CP-violating Phases of MSSM from Lepton Flavor Violating Processes
Seyed Yaser Ayazi, Yasaman Farzan
It has recently been shown that by measuring the transverse polarization of the final particles in the LFV processes , and , one can derive informati…