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The recently published precise spectrum of cosmic ray protons from the Alpha Magnetic Spectrometer has been examined in some detail from the standpoint of a search for deviations from a smooth, simple, power law. We find a significant…

天体物理学 · 物理学 2009-10-31 A. D. Erlykin , S. J. Fatemi , A. W. Wolfendale

We re-examine the extraction of \rho(s,t), the ratio of the real part to the imaginary part of the scattering amplitude, and of the spin-flip amplitude, from the existing experimental data in the Coulomb-hadron interference region. We show…

高能物理 - 唯象学 · 物理学 2011-11-18 O. V. Selyugin , J. -R. Cudell , E. Predazzi

We evaluate the forward Compton scattering off the proton, based on Kramers-Kronig kind of relations which express the Compton amplitudes in terms of integrals of total photoabsorption cross sections. We obtain two distinct fits to the…

核理论 · 物理学 2015-10-28 Oleksii Gryniuk , Franziska Hagelstein , Vladimir Pascalutsa

In the present investigation we study the leading and subleading high-energy behavior of hadron-hadron total cross sections using a best-fit analysis of hadronic scattering data. The parametrization used for the hadron-hadron total cross…

高能物理 - 唯象学 · 物理学 2017-08-30 M. Giordano , E. Meggiolaro , P. V. R. G. Silva

An interpretation is given for elastic proton scattering at ultra-high energies with impact-parameter amplitude exceeding the black disk limit. It is shown that this scattering mode can arise due to the contribution of an exceptional…

高能物理 - 唯象学 · 物理学 2022-08-04 M. L. Nekrasov

A measurement of the top--antitop ($t\bar{t}$) charge asymmetry is presented using 2011 LHC data collected by the ATLAS detector corresponding to an integrated luminosity of 4.6 fb$^{-1}$ at a centre-of-mass energy of 7 TeV. The analysis is…

高能物理 - 实验 · 物理学 2019-08-14 Cécile Deterre , Liza Mijović

Precisely measured electron-proton elastic scattering cross sections [Phys. Rev. Lett. {\bf 105}, 242002 (2010)] are reanalyzed to evaluate their strength for determining the rms charge radius ($R_{\rm E}$) of the proton. More than half of…

核实验 · 物理学 2016-03-23 M. Horbatsch , E. A. Hessels

We study trends in the slope of the total mass profiles and dark matter fractions within the central half-light radius of 258 early-type galaxies, using data from the volume-limited ATLAS$^{\mathrm{3D}}$ survey. We use three distinct sets…

星系天体物理 · 物理学 2017-04-03 A. Poci , M. Cappellari , R. M. McDermid

The data collected by ATIC, PPB-BETS, FERMI-LAT and HESS all indicate that there is an electron/positron excess in the cosmic ray energy spectrum above $\sim$ 100 GeV, although different instrumental teams do not agree on the detailed…

高能天体物理现象 · 物理学 2013-01-18 Yi-Zhong Fan , Bing Zhang , Jin Chang

We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely-polarized 3 GeV electrons from unpolarized protons at Q^2 = 0.15, 0.25 (GeV/c)^2. The results are inconsistent with calculations solely using the…

核实验 · 物理学 2010-04-06 G0 Collaboration , D. S. Armstrong

Recent work by Block et al on the energy-invariant edge in proton-proton scattering is interpreted by quantitatively introducing a energy-dependent black-disk fraction of the proton-proton interaction.

高能物理 - 唯象学 · 物理学 2018-11-21 Dieter Schildknecht

Utilizing the most recent experimental data, we reanalyze high energy \pbar p and pp data, using the asymptotic amplitude analysis, under the assumption that we have reached `asymptopia'. This analysis gives strong evidence for a $\log…

高能物理 - 唯象学 · 物理学 2007-05-23 M. M. Block , A. R. White , B. Margolis

We predict pp elastic differential cross section at LHC at the c.m. energy 14 TeV and momentum transfer range |t| = 0-10 GeV*2, which is planned to be measured by the TOTEM group. The field theory model underlying our phenomenological…

高能物理 - 唯象学 · 物理学 2007-05-23 M. M. Islam , R. J. Luddy , A. V. Prokudin

The cross section of atomic electron Compton scattering $\gamma + e \rightarrow \gamma^\prime + e^\prime $ was measured in the 4.40--5.475 GeV photon beam energy region by the {\em PrimEx} collaboration at Jefferson Lab with an accuracy of…

Recently, it was noted that absorptive corrections to the electromagnetic form factor in high-energy proton-proton scattering are important for the theoretical interpretation of the $p^\uparrow{p}$ and $p^\uparrow{A}$ analyzing power…

高能物理 - 唯象学 · 物理学 2024-09-18 Andrei Poblaguev

We have measured the elastic-scattering ratios of normalized yields for charged pions from 3H and 3He in the backward hemisphere. At 180 MeV, we completed the angular distribution begun with our earlier measurements, adding six data points…

Some time ago, an accurate phenomenological approach, the BSW model, was developed for proton-proton and antiproton-proton elastic scattering cross sections at center-of-mass energies above 10 GeV. This model has been used to give…

高能物理 - 唯象学 · 物理学 2015-06-04 Claude Bourrely , John M. Myers , Jacques Soffer , Tai Tsun Wu

Charge asymmetry in electron (positron) scattering arises from the interference of the Born amplitude and the box-type amplitude corresponding to two virtual photons exchange. It can be extracted from electron proton and positron proton…

高能物理 - 唯象学 · 物理学 2008-11-26 E. A. Kuraev , V. V. Bytev , S. Bakmaev , E. Tomasi-Gustafsson

The inclusive production of four isolated charged leptons in $pp$ collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb$^{-1}$ of data recorded in the ATLAS detector at the LHC at centre-of-mass energy…

高能物理 - 实验 · 物理学 2019-03-06 ATLAS Collaboration

Energy-dependent and single-energy fits to the existing nucleon-nucleon database have been updated to incorporate recent measurements. The fits cover a region from threshold to 3 GeV, in the laboratory kinetic energy, for proton-proton…

核理论 · 物理学 2016-12-28 Ron L. Workman , William J. Briscoe , Igor I. Strakovsky