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By
Maharana, K; Singh, L P
A scheme is presented for baryon asymmetry generation in early universe through monpoleinduced baryon number violating processes in the context of a preonic model.
By
Choudhury, S R; Mamta; Dutta, Sukanta
1 Citations
We study the implication of triviality on Higgs sector in next to minimal supersymmetric model (NMSSM) using variational field theory. It is shown that the mass of the lightest Higgs boson in NMSSM has an upper bound ∼10M_{W} which is of the same order as that in the standard model.
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By
Grifols, J. A.
1 Citations
I review the constraints on the mass of gravitinos that follow from considerations on energy loss in stars and from big bang nucleosynthesis arguments.
By
Khadkikar, S B; Vinodkumar, P C
16 Citations
Confinement model for gluons using a ‘colour super current’ is formulated. An attempt has been made to derive a suitable dielectric function corresponding to the current confinement. A simple inhomogeneous dielectric confinement model for gluons is studied for comparison. The model Hamiltonians are second quantized and the glueball states are constructed. The spurious motion of the centre of confinement is accounted for. The results of the current confinement scheme is found in good agreement with experimental candidates.
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By
Joshipura, Anjan S; Rindani, Saurabh D
1 Citations
CPviolating rate asymmetry can be generated in a process only if its amplitude possesses an absorptive part. It is pointed out that such an absorptive part can be provided ine^{+}e^{−} annihilation by the presence of aZ(Z′) resonance of nonzero width. The CP asymmetry in the process
$$e^ + e^  \to l_i \bar l\left( {l_i \bar l_j } \right)$$
, wherel_{i} are charged leptons, is discussed in several models. In a specific twoZ model, large and observable CP asymmetry ine^{+}e^{−} →τ^{+}e^{−} (τ^{−}e^{+}) is shown to be possible at LEP/SLC energies.
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By
Bhattacharya, Tanmoy; Roy, Probir
The known lower bound on the unstable photino mass gets invalidated by a gravitino lighter than 10^{−3} eV. Nevertheless, general bounds can be derived by feeding early universe constraints from the primary abundance of He^{4} and the extant lower bound on the gravitino mass into the lifetime for the decay photino → photon + gravitino. The massrangeO(100) eV toO(1) MeV is excluded.
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By
Biswas, S; Kumar, S; Das, L
3 Citations
Confinement model for quarks and gluons is formulated. An attempt has been made to derive the dielectric function starting from a Lagrangian that also determines the quark and gluon field equations. Deconfinement mechanism is also discussed.
By
Paria, Lina; Abbas, Afsar
1 Citations
Using a geometric model to study the structure of hadrons, baryons having one, two and three heavy quarks have been studied here. The study reveals diquark structure in baryons with one and two heavy quarks but not with three heavy identical quarks.
By
Virbhadra, K S
1 Citations
An exact solution of Einstein’s equations is interpreted as describing the gravitational field of a tachyon in a de Sitter universe. Switching off the cosmological constant yields the gravitational field of a tachyon in flat spacetime background.
By
Banerjee, S.
We summarize here the recent results from the four experiments at the large electron positron collider (LEP). These experiments provide precise measurements of theW and Z boson properties and their couplings to leptons and quarks. These measurements, together with measurements of the top quark andW boson masses in the Tevatron collider provide a stringent test of the standard electroweak theory. Searches for Higgs boson and supersymmetric particles have yielded null results so far giving rise to lower bounds in the parameter space.
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