First Measurement of Bose-Einstein Correlations in proton-proton Collisions at $\sqrt{s}$ =0.9 and 2.36 TeV at the LHC
- Khachatryan, Vardan et al
- arXiv:1005.3294CERN-PH-EP-2010-010CMS-QCD-10-003
| Ratios $R(Q)$ obtained with the opposite-hemisphere, same-charge reference samples for data (dots) and MC with no BEC effect (crosses). |
| noimg: Results of fits to the double ratios ${\cal R}(Q)$ for several reference samples, using the parameterization of Eq.~(\ref{eq:exp}) with the exponential form, for 0.9\TeV data (left) and 2.36\TeV data (right). Errors are statistical only, and quoted as if independent.: Results of fits to the double ratios ${\cal R}$ for several reference samples, using the parameterization of Eq.~(\ref{eq:exp}) with the exponential form, for 0.9\TeV data (top) and 2.36\TeV data (bottom). Errors are statistical only, and quoted as if independent. |
| Double ratios ${\cal{R}}(Q)$ for the 0.9\TeV data, using the opposite-hemisphere, same-charge reference samples for combinations enriched, using a \dedx measurement, in pion-pion pairs (dots) and in pion--non-pion pairs (open circles), respectively. |
| Fits to the double ratios ${\cal{R}}^{\text{comb}}(Q)$ with exponential (solid lines) and Gaussian (dashed lines) functions, for $0.9$\TeV (top) and $2.36$\TeV (bottom) data. The range $0.6 |
| Values of the $\lambda$ (top) and $r$ (bottom) parameters as a function of the charged-particle multiplicity in the event for combined (dots) and opposite-hemisphere, same-charge (open circles) reference samples, at 0.9\TeV. The errors shown are statistical only. The points are placed on the horizontal scale at the average of the multiplicity distribution in the corresponding bin. |