Compact Muon Solenoid
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| CMS-PAS-FSQ-12-004 | ||
| Measurement of exclusive $\pi^{+} \pi^{-}$ production in proton-proton collisions at $\sqrt{s} =$ 7 TeV | ||
| CMS Collaboration | ||
| December 2015 | ||
| Abstract: We report a measurement of exclusive pion pair production in proton-proton collisions, dominated by $\mathrm{p} + \mathrm{p} \rightarrow \mathrm{p}^{(*)} + \pi^{+} \pi^{-} + \mathrm{p}^{(*)}$, where the $\pi^{+} \pi^{-}$ pair is produced at central rapidities $y$ and the incident protons stay intact or dissociate without being detected. The measurement is performed with the CMS detector at the LHC, using an integrated luminosity of 450 $\mu \mathrm{b}^{-1}$ collected at a center-of-mass energy of $\sqrt{s} =$ 7 TeV in 2010. The cross section measured in the phase space defined by $p_{T}(\pi) > $ 0.2 GeV/$c$ and $|y(\pi)| < $ 2 is 20.5 $\pm$ 0.3 (stat) $\pm$ 3.1 (syst) $\pm$ 0.8 (lumi) $\mu \mathrm{b}$. The differential $\pi^{+}\pi^{-}$ cross sections as a function of invariant mass, $p_{\mathrm{T}}$, and $y$, and the single $\pi$ cross section as a function of $p_{\mathrm{T}}$, are also shown and compared to model predictions. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
Public twiki page ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Superseded by FSQ-16-006. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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