Speaker
Francesco Cafagna
(Universita e INFN, Bari (IT))
Description
The precise knowledge of the proton-proton cross section is extremely
important to model the development, in the atmosphere, of the showers
induced by the interaction of ultra high energy cosmic rays.
The TOTEM (TOTal cross section, Elastic scattering and diffraction
dissociation Measurement at the LHC) experiment at LHC, has been
designed to measure the total proton-proton cross-section with a
luminosity independent method, based on the optical theorem, and study
the elastic and diffractive scattering at the LHC energy. This method
relies on the capability of the simultaneous measurements of inelastic
and elastic rates; in the TOTEM experiment this is possible thanks to
two forward inelastic telescopes, covering the pseudorapitidy range
3.1 $< \|\eta\| <$ 6.5, and Roman Pot detectors, that can be inserted
down to few hundred microns to the beam centre.
Thanks to dedicated runs, taken between 2011 and 2012, with special
beam optics, TOTEM experiment was able to measure the elastic,
inelastic and total cross-section at $\sqrt{s}=7~TeV$ and $8~TeV$,
using the luminosity independent method, along with the pseudorapidity
distribution of charged particles.
In this contribution the latest results of the TOTEM experiment will
be described along with its performance and the future physics program
for the LHC run 2.
| Registration number following "ICRC2015-I/" | 575 |
|---|---|
| Collaboration | TOTEM |
Author
Francesco Cafagna
(Universita e INFN, Bari (IT))
