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The differential cross sections for $\pi^- p \to \gamma n$ and $\pi^+ n \to \gamma p$ are computed up to $O(p^3)$ in heavy baryon chiral perturbation theory (HBChPT). The expressions at $O(p)$ and $O(p^2)$ have no free parameters. There are…

High Energy Physics - Phenomenology · Physics 2016-09-06 Harold W. Fearing , Thomas R. Hemmert , Randy Lewis , Christine Unkmeir

We discuss inclusive electromagnetic dissociation processes in proton--proton ($pp$) and proton--nucleus ($pA$) scattering at the LHC where one or both of the protons dissociate. These processes which involve the exchange of a virtual…

High Energy Physics - Phenomenology · Physics 2025-07-02 Robert Gȩbarowski , Agnieszka Łuszczak , Marta Łuszczak , Wolfgang Schäfer

We calculate the production of high energy photons from Compton and annihilation processes as well as fragmentation off quarks in the parton cascade model. The multiple scattering of partons is seen to lead to a substantial production of…

Nuclear Theory · Physics 2009-11-07 Steffen A. Bass , Berndt Müller , Dinesh K. Srivastava

There are some discrepancies in the low energy data on the photoabsorption cross section of $^4$He. We calculate the cross section with realistic nuclear forces and explicitly correlated Gaussian functions. Final state interactions and two-…

Nuclear Theory · Physics 2015-06-04 W. Horiuchi , Y. Suzuki , K. Arai

Absolute two-photon detachment cross sections and photoelectron angular distribution are calculated for halogen negative ions within lowest-order perturbation theory. The Dyson equation method is used to obtain the outer np ground-state…

Atomic Physics · Physics 2009-10-31 G. F. Gribakin , V. K. Ivanov , A. V. Korol , M. Yu. Kuchiev

The study of the two-body photodisintegration of the deuteron in the few GeV region is the ideal reaction to clarify the transition from the nucleonic degrees of freedom to the QCD picture of hadrons. The CLAS large angle spectrometer of…

High Energy Physics - Experiment · Physics 2019-08-14 Patrizia Rossi

We possess convincing experimental evidence for the fact that the real photon has non-trivial parton structure. On the other hand, interactions of the cosmic microwave background photons with high energy particles propagating through the…

High Energy Physics - Phenomenology · Physics 2009-04-24 I. Alikhanov

We have developed a theoretical method for interpretation of photoionization experiments with the H_3 molecule. In the present study we give a detailed description of the method, which combines multichannel quantum defect theory, the…

Atomic Physics · Physics 2009-11-10 Viatcheslav Kokoouline , Chris H. Greene

The two-photon decay in hydrogen-like ions is investigated within the framework of second order perturbation theory and Dirac's relativistic equation. Special attention is paid to the angular correlation of the emitted photons as well as to…

Atomic Physics · Physics 2014-10-23 P. Amaro , F. Fratini , S. Fritzsche , P. Indelicato , J. P. Santos , A. Surzhykov

Direct cluster disintegration and radiative capture in the pd, nd, and d3He channels are considered on the basis of potential two-cluster models. Interaction between clusters is described by potentials that, in some cases, involve forbidden…

Nuclear Theory · Physics 2014-08-19 S. B. Dubovichenko

We provide an accurate evaluation of the two-photon exchange correction to the hyperfine splitting of S energy levels in muonic hydrogen exploiting the corresponding measurements in electronic hydrogen. The proton structure uncertainty in…

High Energy Physics - Phenomenology · Physics 2018-02-14 Oleksandr Tomalak

The Faddeev equations are solved in momentum space for the trinucleon bound state with the new Tucson-Melbourne $\pi$ and $\rho$ exchange three-nucleon potentials. The three-nucleon potentials are combined with a variety of realistic…

Nuclear Theory · Physics 2008-11-26 A. Stadler , J. Adam , H. Henning , P. U. Sauer

The parity-nonconserving asymmetry in the deuteron photodisintegration, $\vec{\gamma}+d\to n+p$, is considered with the photon energy ranged up to 10 MeV above the threshold. The aim is to improve upon a schematic estimate assuming the…

Nuclear Theory · Physics 2009-11-10 C. -P. Liu , C. H. Hyun , B. Desplanques

The electron current tensor for the scattering of heavy photon on longitudinally polarized electron accompanied with two hard real photonsis considered. The contribution of collinear and semicollinear kinematics is computed. The obtained…

High Energy Physics - Phenomenology · Physics 2009-10-31 M. Konchtnij , N. P. Merenkov

In plane wave one-body approximation the reaction of deuteron photodisintegration is considered in the framework of the Bethe-Salpeter formalism for two-nucleon system. Results are obtained for deuteron vertex function, which is the…

Nuclear Theory · Physics 2009-11-06 K. Yu. Kazakov , S. Eh. Shirmovsky

The $P$ and $T$ odd deuteron multipoles are calculated in the Reid nucleon-nucleon potential in the chiral limit $m_{\pi}\to 0$. The contact current generated by the $\pi$-meson exchange does not contribute to the anapole moment. The…

Nuclear Theory · Physics 2007-05-23 R. V. Korkin

The distance-resolved effective interaction potential between two parallel DNA molecules is calculated by computer simulations with explicit tetravalent counterions and monovalent salt. Adding counterions first yields an attractive minimum…

Soft Condensed Matter · Physics 2009-11-10 E. Allahyarov , H. Löwen , G. Gompper

We calculate P-odd difference of the total cross-sections of the deuteron disintegration by left and right polarized photons. The relative magnitude of this difference in the threshold region is about 10^{-7}. Its experimental measurement…

Nuclear Theory · Physics 2007-05-23 I. B. Khriplovich , R. V. Korkin

The hadron production in heavy ion collision is treated in the framework of thermodynamic vision. Thermodynamic system formed during central collision of Pb-Pb at high energies is considered, through which binary collision is assumed among…

High Energy Physics - Phenomenology · Physics 2017-08-23 Wedad AL-Harbi , Tarek Hussein

Nucleon transfer reactions in deuteron-deuteron collisions at energies above the three- and four-body breakup threshold are described using exact four-body equations for transition operators that are solved in the momentum-space framework.…

Nuclear Theory · Physics 2017-06-05 A. Deltuva , A. C. Fonseca
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