Abstract
Measurements of open charm and beauty production cross sections in ep deep inelastic scattering (DIS) at HERA from the H1 and ZEUS collaborations are combined. Reduced cross sections are obtained in a restricted kinematic range. Perturbative QCD calculations are compared to the combined data. Next-to-leading order QCD analysis is performed using these data together with combined inclusive HERA DIS cross sections.
Highlights
We analyze the recently discovered phenomena in elastic proton–proton scattering at the LHC, challenging the standard Regge-pole theory: the low-|t| “break”, the accelerating rise with energy of the forward slope B(s, t = 0), absence of secondary dips and bumps on the cone, and the role of the odderon in the forward phase of the amplitude, ρ(13 TeV) = 0.1 ± 0.01 and, especially, its contribution at the dip region, measured recently by TOTEM
Relative contributions from different components to the scattering amplitude are evaluated from the fitted model
During the past seven years, the TOTEM Collaboration produced a number of spectacular results on proton–proton e√lastic and total cross sections measured at the LHC in the range of 2.76 ≤ s ≤ 13 TeV [1]
Summary
We analyze the recently discovered phenomena in elastic proton–proton scattering at the LHC, challenging the standard Regge-pole theory: the low-|t| “break” (departure from the exponential behavior of the diffraction cone), the accelerating rise with energy of the forward slope B(s, t = 0), absence of secondary dips and bumps on the cone, and the role of the odderon in the forward phase of the amplitude, ρ(13 TeV) = 0.1 ± 0.01 and, especially, its contribution at the dip region, measured recently by TOTEM. Relative contributions from different components to the scattering amplitude are evaluated from the fitted model.
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