# Physics at LHC 2012

4-9 June 2012
Life Sciences Centre, UBC
<strong><font color="#cc0000">Abstract submission has closed</font></strong>

## TOTEM status and results

4 Jun 2012, 11:55
20m
LSC-2 (Life Sciences Centre, UBC)

### LSC-2

#### Life Sciences Centre, UBC

University of British Columbia Vancouver, BC Canada
Plenary Talk Standard Model & Beyond

### Speaker

Fabrizio Ferro (INFN - Genova)

### Description

The TOTEM experiment at the LHC has measured the total proton-proton cross-section and the differential elastic cross-section at the energy of $\sqrt{s} = 7$ TeV. The data were collected with the two inelastic telescopes and the Roman Pot detectors during several dedicated runs, partly with a special high-$\beta^*$ beam optics. The elastic scattering measurements cover a range of squared four momentum transfer $|t|$ from 0.02 to $2.5 \mathrm{GeV}^2$ and exhibit an approximately exponential behaviour for $|t| < 0.33 \mathrm{GeV}^2$, followed by a significant diffractive minimum at $|t| = (0.53 \pm 0.01_\mathrm{stat} \pm 0.01_\mathrm{syst}) \mathrm{GeV}^2$. For $|t| > 1.5 \mathrm{GeV}^2$, a power-law decrease with an exponent of $-7.8 \pm 0.3_\mathrm{stat} \pm 0.1_\mathrm{syst}$ was observed. The total cross section has been measured with four different methods: three of them make use of the luminosity measurement provided by CMS, while one is luminosity independent and utilizes the separate measurement of the elastic and inelastic rate. Furthermore, the charged particle pseudorapidity density $dN_{ch}/d\eta$ has been measured in the range $5.3 < \eta < 6.5$.

TOTEM

### Primary author

Fabrizio Ferro (INFN - Genova)

### Presentation Materials

 Proceedings Slides