Compact Muon Solenoid
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| CMS-PAS-SMP-13-001 | ||
| Measurement of the differential isolated diphoton production cross section in pp collisions at sqrt(s) = 7 TeV with the CMS detector | ||
| CMS Collaboration | ||
| 2013 | ||
| Abstract: The measurement of the isolated diphoton production cross section in pp collisions at $\sqrt{s}$~=~7~\TeV is presented. The dataset corresponds to an integrated luminosity of 5.0~fb$^{-1}$ collected by the CMS experiment in the year 2011. A new data-driven method to extract the prompt diphoton yield is used, based on the photon component of the particle-flow isolation. The measured cross section for two isolated photons with transverse momentum above 40 GeV and 25 GeV respectively, in the acceptance $|\eta| < 2.5, |\eta| \notin [1.44,1.57]$ and with an angular separation $\Delta R > 0.45$, is $(16.8\pm 1.8)$ pb. The cross section is measured differentially as a function of the diphoton invariant mass, the diphoton transverse momentum, the azimuthal angle difference between the two photons, and the cosine of the polar angle in the Collins-Soper frame of the diphoton pair. Results are compared to theory predictions at leading, next-to-leading and next-to-next-to-leading order for diphoton production. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
Public twiki page ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, EPJC 74 (2014) 3129. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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