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In a nuclear medium, spin-dependent forces cause the nucleon spins to fluctuate with a rate $\Gamma_\sigma$. We have previously shown that as a consequence the effective axial-current neutrino-nucleon scattering cross section is reduced.…

Astrophysics · Physics 2011-05-12 G. Raffelt , D. Seckel , G. Sigl

We show that instanton calculations in QCD become theoretically well defined in the gluon saturation environment which suppresses large size instantons. The effective cutoff scale is determined by the inverse of the saturation scale. We…

High Energy Physics - Phenomenology · Physics 2009-11-07 Dmitri E. Kharzeev , Yuri V. Kovchegov , Eugene Levin

The mass composition of ultra-high-energy cosmic rays is important for understanding their origin. Owing to our limited knowledge of the hadronic interaction, the interpretations of the mass composition from observations include several…

High Energy Astrophysical Phenomena · Physics 2021-04-06 Ken Ohashi , Hiroaki Menjo , Yoshitaka Itow , Takashi Sako , Katsuaki Kasahara

We calculate the energy dependence of inclusive and diffractive neutrino-nucleus deep-inelastic scattering cross sections within the dipole picture, focusing on the ultra-high-energy regime. We predict an up to $\sim 10\%$ nuclear…

High Energy Physics - Phenomenology · Physics 2024-09-26 Anh Dung Le , Heikki Mäntysaari

In the paper we discussed the evolution equations for diffractive production in the framework of CGC/saturation approach, and found the analytical solutions for several kinematic regions. The most impressive features of these solutions are,…

High Energy Physics - Phenomenology · Physics 2018-07-04 Carlos Contreras , Eugene Levin , Rodrigo Meneses , Irina Potashnikova

We study the global existence and uniform-in-time bounds of classical solutions in all dimensions to reaction-diffusion systems dissipating mass. By utilizing the duality method and the regularization of the heat operator, we show that if…

Analysis of PDEs · Mathematics 2019-05-28 Brian P. Cupps , Jeff Morgan , Bao Quoc Tang

In the perturbative QCD with $N_c\to\infty$ the amplitude for the collision of two heavy nuclei is expressed via dipole densities in the nuclei. Coupled equations for these densities are derived in the configuration space. The equations are…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. A. Braun

The recent data from H1 Collaboration on hadron multiplicity in diffractive DIS has been studied in the framework of perturbative QCD as a function of invariant diffractive mass. The formulas obtained explain the observed excess of particle…

High Energy Physics - Phenomenology · Physics 2009-10-31 R. J. M. Covolan , A. V. Kisselev

We formulate and analyse a saturation model for the total gamma gamma and gamma* gamma* cross-sections and for the real photon structure function F_2^gamma(x,Q^2). The model is based on a picture in which the gamma* gamma* total…

High Energy Physics - Phenomenology · Physics 2009-01-07 N. Timneanu , J. Kwiecinski , L. Motyka

We argue that quantum Liouville field theory supplemented with a suitable source term is the effective theory which describes the short-range correlations of the gluon saturation momentum in the two-dimensional impact-parameter space, at…

High Energy Physics - Phenomenology · Physics 2008-11-26 Edmond Iancu , Larry McLerran

The reaction mechanisms of the following proton diffractive scattering processes are studied and compared with one another: $\gamma^* p\to Vp,\gamma^* p\to Xp, pp\to (\Lambda K^+)p$ and $pA\to \Lambda K^+A$ (Here, $\gamma^*$ stands for the…

High Energy Physics - Phenomenology · Physics 2008-02-03 C. Boros , Liang Zuo-tang , Meng Ta-chung

In this paper the validity of the diffusion approximation for multiple scattering of classical waves in random medium in different regimes is investigated, with emphasize to weak localization effects. Many principle topics are discussed…

Disordered Systems and Neural Networks · Physics 2007-05-23 Peter Slavov

We propose a unified approach which describes both structure functions in the small-$x$ region and diffractive production in $\gamma^*p$-interactions. It is shown that the model, based on reggeon calculus and a quark-parton picture of the…

High Energy Physics - Phenomenology · Physics 2009-10-31 A. Capella , E. G. Ferreiro , A. B. Kaidalov , C. A. Salgado

Diffractive scattering involves exchange of a Pomeron to make a rapidity gap. It is normally assumed that to get a hard scattering in diffraction, one may treat the Pomeron as an ordinary particle, which has distributions of gluons and…

High Energy Physics - Phenomenology · Physics 2009-10-22 John C. Collins , Leonid Frankfurt , Mark Strikman

A mathematical model for the discrete nonlinear fragmentation (collision-induced breakage) equation with diffusion is studied. The existence of global weak solutions is established in arbitrary spatial dimensions without assuming a strictly…

Analysis of PDEs · Mathematics 2026-03-12 Saumyajit Das , Ram Gopal Jaiswal

We study the quantum dynamics of N coherently driven two-level atoms coupled to an optical resonator. In the strong coupling regime the cavity field generated by atomic scattering interferes destructively with the pump on the atoms. This…

Quantum Physics · Physics 2009-11-10 Stefano Zippilli , Giovanna Morigi , Helmut Ritsch

The propagation of a localized wave packet in the conical space-time created by a pointlike massive source in 2+1 dimensional gravity is analyzed. The scattering amplitude is determined and shown to be finite along the classical scattering…

High Energy Physics - Theory · Physics 2009-10-28 M. Alvarez , F. M. de Carvalho Filho , L. Griguolo

Making sense of complex inhomogeneous systems composed of many interacting species is a grand challenge that pervades basically all natural sciences. Phase separation and pattern formation in reaction-diffusion systems have been largely…

Soft Condensed Matter · Physics 2025-06-04 Joshua F. Robinson , Thomas Machon , Thomas Speck

Scales of mass generation for Majorana neutrinos (as well as quarks and leptons) can be probed from high energy 2 --> n inelastic scattering involving a multiple longitudinal gauge boson final state. We demonstrate that the unitarity of 2…

High Energy Physics - Phenomenology · Physics 2007-05-23 Duane A. Dicus , Hong-Jian He

We present numerical results on diffractive dissociation with large invariant mass diffractive final states in the scattering of an electron off a hadron. The diffractive large-mass resummation is performed using the nonlinear…

High Energy Physics - Phenomenology · Physics 2023-08-15 Tuomas Lappi , Anh Dung Le , Heikki Mäntysaari