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We report results on the total and elastic cross sections in proton-protoncollisions at $\sqrt{s}=200$ GeV obtained with the Roman Pot setup of the STARexperiment at the Relativistic Heavy Ion Collider (RHIC). The elasticdifferential cross section was measured in the squared four-momentum transferrange $0.045 \leq -t \leq 0.135$ GeV$^2$. The value of the exponential slopeparameter $B$ of the elastic differential cross section $d\sigma/dt \sime^{-Bt}$ in the measured $-t$ range was found to be $B = 14.32 \pm 0.09(stat.)^{\scriptstyle +0.13}_{\scriptstyle -0.28} (syst.)$ GeV$^{-2}$. Thetotal cross section $\sigma_{tot}$, obtained from extrapolation of the$d\sigma/dt$ to the optical point at $-t = 0$, is $\sigma_{tot} = 54.67 \pm0.21 (stat.) ^{\scriptstyle +1.28}_{\scriptstyle -1.38} (syst.)$ mb. We alsopresent the values of the elastic cross section $\sigma_{el} = 10.85 \pm 0.03(stat.) ^{\scriptstyle +0.49}_{\scriptstyle -0.41}(syst.)$ mb, the elasticcross section integrated within the STAR $t$-range $\sigma^{det}_{el} = 4.05\pm 0.01 (stat.) ^{\scriptstyle+0.18}_{\scriptstyle -0.17}(syst.)$ mb, and theinelastic cross section $\sigma_{inel} = 43.82 \pm 0.21 (stat.) ^{\scriptstyle+1.37}_{\scriptstyle -1.44} (syst.)$ mb. The results are compared with theworld data.

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at $\sqrt{s} = 200$ GeV