تقرير
Exclusive pi+ pi- production at 7TeV
| العنوان: | Exclusive pi+ pi- production at 7TeV |
|---|---|
| المؤلفون: | Khakzad, Mohsen |
| سنة النشر: | 2016 |
| المجموعة: | High Energy Physics - Experiment |
| مصطلحات موضوعية: | High Energy Physics - Experiment |
| الوصف: | We report a measurement of the exclusive production of pairs of charged pions in proton-proton collisions, dominated by the process $pp \rightarrow p^{(*)} \pi^{+}\pi^{-} p^{(*)}$, where $\rm p^{(*)}$ stands for a diffractively dissociated proton, the $\pi^{+} \pi^{-}$ pair is emitted at central rapidities $y$, and the incident protons stay intact or dissociate without detection ${\rm p^{(*)}}$. The measurement is performed with the CMS detector at the LHC, using a data sample corresponding to an integrated luminosity of 450~$\mu$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 pion transverse momentum $p_{\rm T}>0.2$~GeV/c and rapidity $|y|< 2 $ is found to be $20.5~\pm~0.3~(\rm {stat})~(\pm~3.1~\rm {syst})~\pm$~0.8~(lumi)~$\mu$b. The differential cross sections for $\pi^{+}\pi^{-}$ pairs as a function of the pion pair invariant mass, $p_{\rm T}$, and $y$, as well as a single-pion differential cross section as a function of pion $p_{\rm T}$ are also measured and compared to several phenomenological predictions. Comment: 6 pages, 8 figures, DIS 2016 |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1610.08775 |
| رقم الأكسشن: | edsarx.1610.08775 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |