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V. A. Petrov

Publications and source records attributed to V. A. Petrov.

71 records · Page 4Linked to original sources
arXiv2002

Soft Physics -- Three Pomerons?

A model of a three Pomeron contribution to high energy elastic $pp$ and $\bar p p$ scattering is proposed. The data are well described for all momenta ($0.01\le |t|\le 14. GeV^2$) and energies ($8.\le\sqrt{s}\le 1800. GeV$) ($χ^2/{\rm d.o.f.}=2.60$). The model predicts the appearance of two dips in the differential cross-section which will be measured at LHC. The parameters of the Pomeron trajectories are: $α(0)_{{\Bbb P}_1}=1.058, α'(0)_{{\Bbb P}_1}=0.560 (GeV^{-2});$ $α(0)_{{\Bbb P}_2}=1.167, α'(0)_{{\Bbb P}_2}=0.273 (GeV^{-2});$ $α(0)_{{\Bbb P}_3}=1.203, α'(0)_{{\Bbb P}_3}=0.094 (GeV^{-2}).$

hep-ph↗
arXiv2001

Novel features of diffraction at the LHC

Interest and problems in the studies of diffraction at LHC are highlighted. Predictions for the global characteristics of proton-proton interactions at the LHC energy are given. Potential discoveries of the antishadow scattering mode and diffractive scattering conjugated with high--$E_T$ jets are discussed.

hep-ph↗
arXiv2001

The First Three Pomerons

A model of a three Pomeron contribution to high energy elastic $pp$ and $\bar p p$ scattering is proposed. The data are well described for all momenta ($0.01\le |t|\le 14. GeV^2$) and energies ($8.\le\sqrt{s}\le 1800. GeV$) ($χ^2/{\rm d.o.f.}=2.74$). The model predicts the appearance of two dips in the differential cross-section which will be measured at LHC. The parameters of the Pomeron trajectories are: $α(0)_{{\Bbb P}_1}=1.058, α'(0)_{{\Bbb P}_1}=0.560 (GeV^{-2});$ $α(0)_{{\Bbb P}_2}=1.167, α'(0)_{{\Bbb P}_2}=0.273 (GeV^{-2});$ $α(0)_{{\Bbb P}_3}=1.203, α'(0)_{{\Bbb P}_3}=0.094 (GeV^{-2}).$

hep-ph↗
arXiv2000

Does Efficiency of High Energy Collisions Depend on a Hard Scale?

The multiplicity of charged hadrons in the current fragmentation region of both the c.m.s. and the Breit frame of deep inelastic scattering is calculated and compared with the HERA data. The results are in agreeement with Yang's hypothesis that the efficiency of high energy processes increases at larger momentum transfer.

hep-ph↗
arXiv1999

Description of the Proton Structure Function $F_2^p(x,Q^2)$ in the Framework of Extended Regge - Eikonal Approach

The proton structure function $F_2^p(x,Q^2)$ is described in the framework of the off-shell extention of the Regge-eikonal approach which automatically takes into account off-shell unitarity. We achieved a good quality of description for $x<10^{-2}$ and we argue that the data on $F_2^p(x,Q^2)$ measured at HERA can be fairly described with classical universal Regge trajectories. No extra, ``hard'' trajectories of high intercept are needed for that. The $x-, Q^2-$ slopes and the effective intercept are discussed as functions of $Q^2$ and $x$.

hep-ph↗
arXiv1999

Regge-Eikonal Approach and its off-Shell Extention Versus Experimental Data

We develop an off-shell extention of the Regge-eikonal approach which automatically takes into account off-shell unitarity. We argue that exclusive vector-meson production cross-sections measured at HERA can be fairly described with classical universal Regge trajectories. No extra ``hard'' trajectories of high intercept are needed for that.

hep-ph↗
arXiv1998

Nucleon Spin Puzzle: Ten Years Later

This is a brief survey of the present state of ideas concerning the parton content of the nucleon spin after their ten-years evolution since the discovery of the EMC.

hep-ph↗
arXiv1998

Box Anomaly and $η' \to π^+ π^- γ$ Decay

In the framework of the "current scheme" of $η- η'$ mixing we calculate the amplitude of the decay $η' \to π^+ π^- γ$ in the soft limit and compare our results with recently reported values of the phenomenological additive terms to the $ρ$--meson background.

hep-ph↗
arXiv1997

Does the ``Soft Pomeron'' Cope with the HERA Data?

It is demonstrated that the "soft pomeron" (together with a secondary reggeon) describing cross-sections of hadron-hadron collisions is fairly able to describe the energy dependence of cross-sections of exclusive (virtual) photoproduction of vector mesons $(ρ^0, ϕ, J/ψ)$ obtained at HERA. However these poles are insufficient for description of the total DIS cross-section.

hep-ph↗
arXiv1996

Dependence of Deep Inelastic Structure Functions on Quark Masses

We argue that the difference between the structure functions corresponding to deep inelastic scattering with and without heavy quarks in the current fragmentation region scales at high $Q^2$ and fixed (low) $x_{Bj}$. The lower bound on charm contribution to the total structure function, $F_2^c(Q^2,x)$, is calculated and compared with the recent data on $F_2^c(Q^2,x)$ from H1 Collaboration.

hep-ph↗
arXiv1996

Unitarity Effects at Low x

We discuss effects of unitarity on the low-x behaviour of the structure functions of deeply inelastic scattering. Particular attention is paid to the distinction between Regge and Renormalization Group $J$-plane singularities and their relative weight in defining the low-x asymptotics.

hep-ph↗
arXiv1996

Quark Mass Effects in Deeply Inelastic Scattering

We argue that the difference between the structure functions corresponding to deep inelastic scattering with and without heavy quarks in the current fragmentation region scales at high Q^2 and fixed (low) x.

hep-ph↗