Maharaja Sayajirao University of Baroda

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19972025

most citedRelativistic stellar model admitting a quadratic equation of state

132 citations

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hep-ph2024★ 2 cited

Decay $B_{c}^{+} \to D_{(s)}^{(*) +} ℓ^{+} ℓ^{-}$ within covariant confined quark model

Mikhail A. Ivanov, Jignesh N. Pandya, Pietro Santorelli +1

We study the rare semileptonic decays of $B_{c}$ mesons within the effective field theoretical framework of covariant confined quark model. The transition form factors corresponding…

hep-ph2023★ 6 cited

Prediction of various observables for $B_{s}^{0} \to D_{s}^{(*) -} ℓ^{+} ν_{ℓ}$ within covariant confined quark model

J. N. Pandya, P. Santorelli, N. R. Soni

In 2020, the LHCb collaboration reported the exclusive branching fractions for the channels $B_{s}^{0} \to D_{s}^{(*) -} μ^{+} ν_{μ}$ for the very first time. In view of these observations, we…

hep-ph2021★ 19 cited

Form factors and branching fraction calculations for $B_{s} \to D_{s}^{(*)} ℓ^{+} ν_{ℓ}$ in view of LHCb observation

Nakul R. Soni, Aidos Issadykov, Akshay N. Gadaria +3

In light of the LHCb observations about the $B_{s} \to D_{s}^{(*)} ℓ ν_{ℓ}$ semileptonic decays, we study these channels within the Standard Model framework of covariant confined qu…

hep-ph2020★ 4 cited

Spectroscopy of heavy-heavy flavour mesons and annihilation widths of quarkonia

Nakul R. Soni, Rikita M. Parekh, Janaki J. Patel +2

Within the framework of nonrelativistic quark-antiquark Cornell potential model formalism, we study the annihilation of heavy quarkonia. We determine their annihilation widths resu…

hep-ph2020★ 35 cited

Semileptonic Decays of Charmed Mesons to Light Scalar Mesons

Nakul R. Soni, Akshay N. Gadaria, Janaki J. Patel +1

Within the framework of covariant confined quark model, we compute the transition form factors of $D$ and $D_{s}$ mesons decaying to light scalar mesons $f_{0} (980)$ and $a_{0} (980)$ . Th…

hep-ph2018★ 8 cited

Eta-nucleon and eta-prime-nucleon coupling constants in QCD and the role of gluons

Janardan P. Singh, Shesha D. Patel

Coupling constants of $η$ and $η^{'}$ mesons with nucleons have been calculated using the method of QCD sum rules. Starting from vacuum-to-meson correlation function of interp…

hep-ph2018

Sub-leading power corrections to transition form factors of $η$ and $η^{'}$ mesons from twist-six contributions

Janardan P. Singh, Shesha D. Patel

Using collinear factorization, we have calculated twist-six corrections to $η γ$ and $η^{'} γ$ transition form factors in QCD. Only a sub-set of light-cone operators of twist-si…

hep-ph2018★ 12 cited

Bottomonium spectroscopy motivated by general features of pNRQCD

Raghav Chaturvedi, Ajay Kumar Rai, Nakul R. Soni +1

The bottomonium mass spectra is computed in the framework of potential non-relativistic quantum chromodynamics. The potential consists of a static term incorporating Coulombic plus…

hep-ph2018★ 63 cited

Semileptonic $D_{(s)}$ -meson decays in the light of recent data

Nakul R. Soni, Mikhail A. Ivanov, Jürgen G. Körner +3

Inspired by recent improved measurements of charm semileptonic decays at BESIII, we study a large set of $D (D_{s})$ -meson semileptonic decays where the hadron in the final state is o…

hep-ph2018★ 59 cited

Spectroscopy and Decay properties of the charmonium

Virendrasinh Kher, Ajay Kumar Rai

The mass spectra of charmonium are investigated using a Coulomb plus linear (Cornell) potential. Gaussian wave function in position space as well as in momentum space are employed…

hep-ph2017★ 26 cited

Decay $D \to K^{(*)} ℓ^{+} ν_{ℓ}$ in covariant quark model

N. R. Soni, J. N. Pandya

We study the leptonic and semileptonic $D$ -meson decays ( $D \to ℓ^{+} ν_{ℓ}$ and ${\mathit{D} \to} {{\mathit K}^{(*)}}{{\mathit \el…

hep-ph2017★ 101 cited

$Q Q ˉ$ ( $Q \in {b, c}$ ) spectroscopy using Cornell potential

N. R. Soni, B. R. Joshi, R. P. Shah +2

The mass spectra and decay properties of heavy quarkonia are computed in nonrelativistic quark-antiquark Cornell potential model. We have employed the numerical solution of Schrödi…

hep-ph2017★ 35 cited

Spectroscopy, Decay properties and Regge trajectories of the $B$ and $B_{s}$ mesons

Virendrasinh Kher, Nayneshkumar Devlani, Ajay Kumar Rai

A Gaussian wave function is used for detailed study of mass spectra of the $B$ and $B_{S}$ mesons using a Cornell potential incorporated with a $O (1/ m)$ correction in the p…

hep-ph2017★ 35 cited

Excited state mass spectra, Decay properties and Regge trajectories of charm and charm-strange mesons

Virendrasinh Kher, Nayneshkumar Devlani, Ajay Kumar Rai

The framework of phenomenological quark-antiquark potential (Coulomb plus linear confinement) model with the Gaussian wave function is used for detailed study of masses of the grou…

hep-ph2015

Singlet axial-vector coupling constant of the nucleon in QCD without instantons

Janardan P. Singh

We have analyzed axial-vector current-current correlation functions between one-nucleon states to calculate the singlet axial-vector coupling constant of the nucleon. The octet-oct…

hep-ph2014★ 14 cited

Decay rates and electromagnetic transitions of heavy quarkonia

J. N. Pandya, N. R. Soni, N. Devlani +1

The electromagnetic radiative transition widths for heavy quarkonia, as well as digamma and digluon decay widths, are computed in the framework of the extended harmonic confinement…

hep-ph2013

An analysis of B meson decays to two light pseudoscalar nonets with deltaS=1 in QCD factorization approach

Janardan P. Singh, N. G. Deshpande

We have performed a numerical analysis of branching ratios and direct CP-asymmetries of B meson decays to two light pseudoscalar nonets with deltaS=1 using QCD improved factorizati…

hep-ph2010★ 6 cited

Eta-nucleon coupling constant in QCD with SU(3) symmetry breaking

Janardan P. Singh, Frank X. Lee, Lai Wang

We study the $η$ NN coupling constant using the method of QCD sum rules starting from the vacuum-to-eta correlation function of the interpolating fields of two nucleons. The matrix…

hep-ph2009★ 9 cited

Axial and pseudoscalar current correlators and their couplings to eta and etaprime mesons

J. P. Singh, J. Pasupathy

Correlators of singlet and octet axial currents, as well as anomaly and pseudoscalar densities have been studied using QCD sum rules. Several of these sum rules are used to determi…

hep-ph2009★ 23 cited

Decay rates of quarkonia with NRQCD formalism using spectroscopic parameters of potential models

Ajay Kumar Rai, J N Pandya, P C Vinodkumar

Decay rates of quarkonia are studied within the framework of NRQCD formalism. The basic parameters of the formalism have been obtained from different potential schemes studied for…

hep-ph2007★ 45 cited

Multiquark states as di-hadronic molecules

Ajay Kumar Rai, J N Pandya, P C Vinodkumar

Multiquark systems such as tetraquarks, pentaquarks and hexaquarks states are studied as di-hadronic molecules in a nonrelativistic model. The masses of several di-hadronic states…

hep-ph2005★ 7 cited

The derivative of the topological susceptibility at zero momentum and an estimate of $η^{'}$ mass in the chiral limit

J. Pasupathy, J. P. Singh, R. K. Singh +1

The anomaly-anomaly correlator is studied using QCD sum rules. Using the matrix elements of anomaly between vacuum and pseudoscalars $π, e t a$ and $η^{'}$ , the derivative of correlator…

hep-ph2003★ 17 cited

Spin Studies of Nucleons in a Statistical Model

J. P. Singh, Alka Upadhyay

We decompose various quark-gluon Fock states of a nucleon in a set of states in which each of the three-quark core and the rest of the stuff, termed as a sea, appears with definite…

hep-ph1997★ 4 cited

Forward-backward asymmetry in e+e- -> nu nubar Z from anomalous CP-odd WWZ couplings

Saurabh D. Rindani, J. P. Singh

Anomalous CP-odd W+W-Z couplings can give rise to a forward-backward asymmetry in the Z angular distribution in the e+e- centre-of-mass frame in the process e+e- -> nu nubar Z. Of…

Decay Bc+​→D(s)(∗)+​ℓ+ℓ− within covariant confined quark model

Prediction of various observables for Bs0​→Ds(∗)−​ℓ+νℓ​ within covariant confined quark model

Form factors and branching fraction calculations for Bs​→Ds(∗)​ℓ+νℓ​ in view of LHCb observation