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 $5.3 < \eta < 6.5$.
<strong>Collaboration Name</strong><br /><font color="#000099">Please enter the name of<br />the collaboration or group<br />using the acronym, as in:<br /><font color="#ff0000">ABC Collaboration</font>
TOTEM
| <strong>E-mail Address</strong> | ferro@ge.infn.it |
|---|
Author
Fabrizio Ferro
(INFN - Genova)
