23-29 June 2019
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


Quy Nhon, Vietnam
Elastic Scattering and Total Cross Section Session 3


Bogdan Pawlik (Institute of Nuclear Physics PAS)


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)

Presentation Materials