Searcharxiv⌕ Search

arXiv subjects

S. M. Troshin

Publications and source records attributed to S. M. Troshin.

At least 91 records · Page 5Linked to original sources
arXiv2007

Reflective scattering from unitarity saturation

Proceeding from optical analogy we propose a new physical interpretation of unitarity saturation leading to antishadowing as a reflective scattering. This interpretation of antishadowing is related to the non-perturbative aspects of strong interactions and follows from the specific property of the unitarity saturation when elastic $S$-matrix $S(s,b)|_{b=0}\to -1$ at $s\to \infty$. The analogy with Berry phase and experimental consequences of the proposed interpretation as reflective scattering at the LHC and in the cosmic rays studies are discussed.

hep-ph↗
arXiv2007

Transient state of matter in hadron and nucleus collisions

We discuss properties of the specific strongly interacting transient collective state of matter in hadron and nuclei reactions and emphasize similarity in their dynamics. We consider elliptic flow introduced for description of nucleus collisions and discuss its possible behavior in hadronic reactions.

hep-ph↗
arXiv2006

Semiclassical mechanism for single-spin asymmetry in π^0-production

The chiral quark model combined with unitarity and impact parameter picture provides simple semiclassical mechanism for generation of the single-spin asymmetry $A_N$ in the $π^0$-production in the polarized proton collisions at RHIC. We derive its linear $x_F$-dependence in polarized proton fragmentation region along with the energy and transverse momentum independence at large $p_T$ values.

hep-ph↗
arXiv2006

Indications for the new unitarity regime in the extensive air showers measurements

We note that the new unitarity regime when scattering amplitude goes beyond the black disc limit (antishadowing) could help in the explanation of the regularities such as knee in the energy spectrum, existence of penetrating and long-flying particles and other features observed in the measurements of the extensive air showers which originate from cosmic particles interactions with the atmosphere.

hep-ph↗
arXiv2005

Spin physics program in the U70 polarized proton beam

A possibility to accelerate a high intensity polarized proton beam up to 70 GeV at the IHEP accelerator, extract it from the main ring and deliver to several experimental setups is being studied now. We propose to study a wealth of single- and double-spin observables in various reactions using longitudinally and transverserly polarized proton beams at U70. The proposed measurements can be done at the existing detectors as well as require to create a few new experimental setups at U70.

hep-ex↗
arXiv2005

Soft dynamics of large transverse momentum processes

We discuss the point that the processes with high transverse momenta could have a nonperturbative origin. This discussion is motivated by the fact that there are several experimental indications that such processes can originate from soft dynamics. The model combined with unitarity and impact parameter picture provides simple mechanism for the hadron production and reproduces power like dependence of the differential cross-sections in such processes at high transverse momenta and exponential behavior at small values of p_t. This model can be used for support of the argument that the soft dynamics can be responsible for large transverse momenta processes.

hep-ph↗
arXiv2005

Chiral quark model spin filtering mechanism and hyperon polarization

The model combined with unitarity and impact parameter picture provides simple mechanism for generation of hyperon polarization in collision of unpolarized hadrons. We concentrate on a particular problem of $Λ$-hyperon polarization and derive its linear $x_F$-dependence as well as its energy and transverse momentum independence at large $p_\perp$ values. Mechanism responsible for the single--spin asymmetries in pion production is also discussed.

hep-ph↗
arXiv2005

Chiral quark filtering mechanism of hyperon polarization

The model combined with unitarity and impact parameter picture provide a rather simple mechanism of hyperon polarization generation in collision of unpolarized hadrons. We concentrate on a particular problem of $Λ$-hyperon polarization and derive its linear $x_F$-dependence as well as its energy and transverse momentum independence at large $p_\perp$. Mechanism responsible for the single--spin asymmetries in pion production is also discussed.

hep-ph↗
arXiv2005

Cosmic rays and antishadowing

We note that antishadowing could help in the explanation of cosmic rays phenomena such as knee in the energetic spectrum and existence of penetrating and long-flying particles.

hep-ph↗
arXiv2004

Energy dependence of gap survival probability and antishadowing

We discuss energy dependence of gap survival probability which follows from rational form of amplitude unitarization. In contrast to eikonal form of unitarization which leads to decreasing energy dependence of gap survival probability, we predict a non-monotonous form for this dependence.

hep-ph↗
arXiv2004

Spin correlations due to antishadowing

The effects of antishadowing related to the spin correlations of particles in multiparticle production are discussed. It is shown that significant spin correlations should be expected at the LHC energies.

hep-ph↗