PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Strong interactions and Hadron Physics
Determination of the total cross section and $\rho$-parameter from elastic scattering in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
H. Stenzel
Full text: Not available
Abstract
A new measurement of elastic $pp$ scattering at $\sqrt{s} = 13$ TeV with the ATLAS-ALFA detector is presented. The measurement was performed using data recorded in a special run of the LHC with $\beta^\star = 2.5$ km.
The elastic cross-section was measured differentially in the Mandelstam $t$ variable and from a fit to
${\textrm{d}}\sigma/\textrm{d}t$ the total cross section, the $\rho$-parameter and parameters of the nuclear slope are determined.
The results for $\sigma_{\textrm{tot}}$ and $\rho$ are
\begin{equation*}
\sigma_{\textrm{tot}}(pp\rightarrow X) = \mbox{104.7} \; \pm 1.1 \; \mbox{mb} ,
\; \; \rho = \mbox{0.098} \; \pm 0.011 .
\end{equation*}
The energy evolution of $\sigma_{\textrm{tot}}$ and $\rho$, connected through
dispersion relations, is compared to several models. Furthermore, the total inelastic
cross section is determined from the difference of the total and elastic cross section, and
the ratio of the elastic to total cross section is calculated.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.