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Roman Pasechnik

Senior lecturer

Typical working day..

Spin-dependent Pomeron and Odderon in elastic proton–proton scattering

Author

  • Yoshikazu Hagiwara
  • Yoshitaka Hatta
  • Roman Pasechnik
  • Jian Zhou

Summary, in English

We introduce a new model of near-forward elastic proton–(anti)proton scattering at high energy based on the modern formulation of Pomeron and Odderon in terms of Wilson lines and generalized transverse momentum dependent distributions. We compute the helicity-dependent elastic amplitudes ϕ1 , 2 , 3 , 4 , 5 in this model and study their energy dependence from the nonlinear small-x evolution equations. While both Pomeron and Odderon contribute to helicity-flip processes in general, in the forward limit t= 0 only the double helicity-flip amplitude ϕ2, dominated by the spin-dependent Odderon, survives. This may affect the extraction of the ρ parameter as well as the total cross section in the LHC energy domain and beyond.

Department/s

  • Theoretical Particle Physics

Publishing year

2020-05-15

Language

English

Publication/Series

European Physical Journal C

Volume

80

Issue

5

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044