# EDS Blois 2019: The 18th Conference on Elastic and Diffractive Scattering

23-29 June 2019
ICISE
Asia/Ho_Chi_Minh timezone
15th Rencontres du Vietnam

## Results on Total and Elastic Cross Sections in Proton--Proton Collisions at $\sqrt{s} = 200$ GeV Obtained with the STAR Detector at RHIC.

25 Jun 2019, 11:30
30m
ICISE

#### ICISE

Quy Nhon, Vietnam
Elastic Scattering and Total Cross Section

### Speaker

Bogdan Pawlik (Institute of Nuclear Physics PAS)

### Description

Bogdan Pawlik for the STAR Collaboration
We report the first results on differential, total and elastic cross sections in proton-proton collisions at the Relativistic Heavy Ion Collider (RHIC) at $\sqrt{s}=200$ GeV. The data were obtained with the Roman Pot Detector subsystem of the STAR experiment. The data used for this analysis cover the four-momentum transfer squared ($t$) range $0.045 \ge -t \le 0.135$ (GeV/c)$^2$. The Roman Pot system was placed downstream of the STAR detector at vertical distance of about $8\sigma_y$ from the beam and operated during standard data taking.The results include values of the exponential slope parameter (B), elastic cross section ($\sigma_{el}$) and the total cross section ($\sigma_{tot}$) obtained by extrapolation of the elastic differential cross section ($d\sigma/dt$) to the optical point at $-t = 0$ (GeV/c)$^{2}$. The detector setup and analysis procedure are reviewed. All results are compared with the world data.

### Primary authors

Bogdan Pawlik (Institute of Nuclear Physics PAS) Wlodek Guryn (Brookhaven National Laboratory)