On the possibility for precision measurements of differential cross sections for elastic proton–proton scattering at the Protvino accelerator

AbstractThe unitarily extended Bialas–Bzdak model of elastic proton–proton scattering is applied, without modifications, to describe the differential cross-section of elastic proton–antiproton collisions in the TeV energy range, and to extrapolate these differential cross-sections to LHC energies. In this model-dependent study we find that the differential cross-sections of elastic proton–proton collision data at 2.76 and 7 TeV energies differ significantly from the differential cross-section of elastic proton–antiproton collisions extrapolated to these energies. The elastic proton–proton differential cross-sections, extrapolated to 1.96 TeV energy with the help of this extended Bialas–Bzdak model do not differ significantly from that of elastic proton–antiproton collisions, within the theoretical errors of the extrapolation. Taken together these results provide a model-dependent, but statistically significant evidence for a crossing-odd component of the elastic scattering amplitude at the at least 7.08 sigma level. From the reconstructed Odderon and Pomeron amplitudes, we determine the $$\sqrt{s}$$ s dependence of the corresponding total and differential cross-sections.

Download Full-text

Approximation of Differential Cross Sections for Elastic Proton–Nucleus Scattering

Physics of Atomic Nuclei ◽

10.1134/s1063778821040128 ◽

2021 ◽

Vol 84 (5) ◽

pp. 615-634

Author(s):

A. A. Galyuzov ◽

M. V. Kosov

Keyword(s):

Cross Sections ◽

Differential Cross ◽

Differential Cross Sections ◽

Elastic Proton ◽

Nucleus Scattering

Download Full-text

The QCD odderon in elastic (anti)proton scattering

The European Physical Journal C ◽

10.1140/epjc/s10052-021-08943-x ◽

2021 ◽

Vol 81 (2) ◽

Author(s):

M. A. Braun

Keyword(s):

Impact Factor ◽

Cross Sections ◽

Differential Cross ◽

Differential Cross Sections ◽

Proton Scattering ◽

Proton Impact

AbstractThe C-odd amplitude for the elastic pp and $$p\bar{p}$$ p p ¯ scattering due to the exchange of the QCD odderon proposed by J. Bartels, L.N. Lipatov and G.P. Vacca is calculated with the Fukugita–Kwiecinski proton impact factor. The found amplitude is very small and cannot be felt in the differential cross-sections at 2.76 and 1.96 TeV respectively.

Download Full-text

Measurements of inclusive and differential cross-sections of combined $$ t\overline{t}\gamma $$ and tWγ production in the eμ channel at 13 TeV with the ATLAS detector

Journal of High Energy Physics ◽

10.1007/jhep09(2020)049 ◽

2020 ◽

Vol 2020 (9) ◽

Author(s):

G. Aad ◽

◽

B. Abbott ◽

D. C. Abbott ◽

A. Abed Abud ◽

...

Keyword(s):

Cross Sections ◽

Differential Cross ◽

Theoretical Calculations ◽

Top Quarks ◽

Atlas Detector ◽

Proton Collision ◽

Differential Cross Sections ◽

Proton Proton ◽

Fiducial Volume ◽

Proton Proton Collision

Abstract Inclusive and differential cross-sections for the production of top quarks in association with a photon are measured with proton-proton collision data corresponding to an integrated luminosity of 139 fb−1. The data were collected by the ATLAS detector at the LHC during Run 2 between 2015 and 2018 at a centre-of-mass energy of 13 TeV. The measurements are performed in a fiducial volume defined at parton level. Events with exactly one photon, one electron and one muon of opposite sign, and at least two jets, of which at least one is b-tagged, are selected. The fiducial cross-section is measured to be $$ {39.6}_{-2.3}^{+2.7} $$ 39.6 − 2.3 + 2.7 fb. Differential cross-sections as functions of several observables are compared with state-of-the-art Monte Carlo simulations and next-to-leading-order theoretical calculations. These include cross-sections as functions of photon kinematic variables, angular variables related to the photon and the leptons, and angular separations between the two leptons in the event. All measurements are in agreement with the predictions from the Standard Model.

Download Full-text

Measurement of differential cross sections for inclusive isolated-photon and photon+jet production in proton-proton collisions at $$\sqrt{s} = 13\,\text {TeV} $$ s = 13 TeV

The European Physical Journal C ◽

10.1140/epjc/s10052-018-6482-9 ◽

2019 ◽

Vol 79 (1) ◽

Cited By ~ 2

Author(s):

A. M. Sirunyan ◽

◽

A. Tumasyan ◽

W. Adam ◽

F. Ambrogi ◽

...

Keyword(s):

Cross Sections ◽

Differential Cross ◽

Differential Cross Sections ◽

Proton Proton ◽

Proton Collisions ◽

Jet Production ◽

Proton Proton Collisions

Download Full-text

Dynamic polarization work at A. E. R. E., Harwell

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1965.0038 ◽

1965 ◽

Vol 283 (1395) ◽

pp. 480-480

Keyword(s):

Cross Section ◽

Cross Sections ◽

Differential Cross ◽

Spin Correlation ◽

Proton Scattering ◽

Dynamic Polarization ◽

Target Polarization ◽

Proton Proton ◽

Low Intensity ◽

Correlation Parameters

In proton-proton scattering, when both incident and target protons have polarizations of P 1 and P 2 respectively in a direction normal to the plane of scattering, the differential cross-section, σ, at angle θ is given by σ( θ ) = σ 0 ( θ ) {1 + ( P 1 + P 2 ) P 3 ( θ ) + P 1 P 2 C NN ( θ )}. P 3 ( θ ) and C NN ( θ ) are the polarization and spin-correlation parameters of proton-proton scattering, and are functions of incident proton energy and scattering angle. The Harwell synchrocyclotron provides a choice of two proton beams at an energy of 142MeV ( a ) high intensity P 1 = 0, and ( b ) low intensity P 1 = ±0.48. P 3 ( θ ) is a well-known quantity, and the two remaining unknowns, P 2 and C NN ( θ ) can be obtained by comparing differential cross-sections measured with beams ( a ) and ( b ). Somewhat higher precision is obtainable in such a measurement of the target polarization P 2 than by either of the existing solid-state methods (Schmugge & Jeffries 1962; Abragam, Borghini & Chapellier 1962).

Download Full-text