# Study of deuteron-proton backward elastic scattering at intermediate energies.

### Submission summary

 As Contributors: Nadezhda Ladygina Preprint link: scipost_201910_00001v1 Date accepted: 2019-12-20 Date submitted: 2019-10-01 Submitted by: Ladygina, Nadezhda Submitted to: SciPost Physics Proceedings Proceedings issue: 24th European Few Body Conference (University of Surrey, U.K.) Discipline: Physics Subject area: Nuclear Physics - Theory Approach: Theoretical

### Abstract

We study deuteron- proton elastic scattering in the deuteron energy range between 500 MeV and 2~GeV at the cms scattering angle $\theta^*\ge 140^\circ$. The reaction is considered in the relativistic multiple scattering expansion framework. The four reaction mechanisms are included into consideration: one-nucleon exchange, single scattering, double scattering, and the term corresponding to the delta excitation in the intermediate state. The model is applied to describe the angular dependence of the differential cross section at the deuteron energies of between 880 and 1300 MeV. Also the energy dependence of the differential cross section and polarisation observables such as tensor analyzing power $T_{20}$ and polarization transfer from the deuteron to proton $\varkappa$ are considered at the scattering angle equal to 180$^\circ$. Contributions of the different reaction mechanisms into the reaction amplitude are demonstrated in comparison with the existing experimental data.

Published as SciPost Phys. Proc. 3, 053 (2020)

### Submission & Refereeing History

Submission scipost_201910_00001v1 on 1 October 2019

## Reports on this Submission

### Report 1 by Paul Stevenson on 2019-12-17 Contributed Report

• Cite as: Paul Stevenson, Report on arXiv:scipost_201910_00001v1, delivered 2019-12-17, doi: 10.21468/SciPost.Report.1503

### Report

The paper describes theoretical results of multiple scattering theory for backwards scattering at high energy of dp reactions. A term-by-term analysis is made to understand which terms (diagrams) contribute most significantly to the cross sections. The results are interesting and show in general that inclusion of all terms considered (i.e. including intermediate states) is necessary to get good agreement with experiment. I recommend the paper for publication, as a good summary of the work presented at the conference Small correction: before equation (6) I believe it should be the Lorentz (note spelling) transformations for the kinematic variables. This can be corrected in the proof stage.

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