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Y. N. Srivastava

Publications and source records attributed to Y. N. Srivastava.

134 records · Page 8Linked to original sources
arXiv1996

Charged Lepton Oscillations and (g-2) Measurements

Traditional analysis of $g=2(1+κ)$ experiments for charged leptons use a classical spin vector picture. For muons, we here employ a more exact Dirac quantum four component spinor theory. Survival probabilities (including wave packet effects) are computed. These oscillate with the frequency $Ω=(κeB/Mc)$ as has been assumed in previous muon $(g-2)$ experimental analyses; i.e. muon survival probability oscillations are already at the root of previous succesful $(g-2)$ measurements. Further oscillations should also be observed if mixed neutrino mass matrices were to enter into the reactions (e.g. $π^+ \to μ^+ +ν_μ$) producing muons.

hep-ph↗
arXiv1996

Lepton Oscillations

A simple but general proof is presented to show that Lorents covariance and 4-momentum conservation alone are sufficient to obtain muon oscillations in the pion decay if the recoiling neutrinos oscillate.

hep-ph↗
arXiv1996

Lambda Oscillations and the Conservation Laws

Lowe, Bassalleck, Burkhardt, Rusek, Stephenson, and Goldman assert, under the assumption of decays at fixed space-time points, that Kaon induced Lambda oscillations disappear. We find, under the same assumption, that energy conservation and momentum conservation also disappear. Ordinary particles can exhibit quantum oscillations.

hep-ph↗
arXiv1996

Bloch-Nordsieck Summation and Partonic Distributions in Impact Parameter Space

A model for the parton distributions of hadrons in impact parameter space has been constructed using soft gluon summation. This model incorporates the salient features of distributions obtained from the intrinsic transverse momentum behaviour of hadrons. Under the assumption that the intrinsic behaviour is dominated by soft gluon emission stimulated by the scattering process, the b-spectrum becomes softer and softer as the scattering energy increases. In minijet models for the inclusive cross-sections, this will counter the increase from $σ_{jet}$ .

hep-ph↗
arXiv1996

Mini-jet Total Cross-sections and Overlap Functions through Bloch-Nordsieck Summation

Predictions for total inelastic cross-sections for photon induced processes are discussed in the context of the QCD-inspired minijet model. Large theoretical uncertainties exist, some of them related to the parton distributions of hadrons in impact parameter space. A model for such distribution is presented, based on soft gluon summation. This model incorporates (the salient features of distributions obtained from) the intrinsic transverse momentum behaviour of hadrons. Under the assumption that the intrinsic behaviour is dominated by soft gluon emission stimulated by the scattering process, the b-spectrum becomes softer and softer as the scattering energy increases. In minijet models for the inclusive cross-sections, this will counter the increase from $σ_{jet}$ .

hep-ph↗
arXiv1995

QUANTUM DISSIPATION AND QUANTUM NOISE

We derive the exact action for a damped mechanical system ( and the special case of the linear oscillator) from the path integral formulation of the quantum Brownian motion problem developed by Schwinger and by Feynman and Vernon. The doubling of the phase-space degrees of freedom for dissipative systems and thermal field theories is discussed and the initial values of the doubled variables are related to quantum noise effects.

hep-th↗
arXiv1992

Wightman Functions in QCD

The constraint imposed by Gauss' law is used to show that the matrix elements of n-point Wightman Functions of gluon field and quark current operators at different space time points vanish when taken between physical states.

hep-ph↗