CMS BPH Jamboree 2015 Results

Dimuon Mass Spectrum. Dimuon mass distribution collected with various dimuon triggers, during the 25ns running period at 13 TeV in 2015. The coloured paths correspond to dedicated dimuon triggers with low

$p_{\mathrm{T}}$ thresholds, in specific mass windows, while the light gray continuous distribution represents events collected with a dimuon trigger with high pT thresholds.

The $\mathrm{B}^+$ meson differential cross sections, as a function of transverse momentum and rapidity, are measured in pp collisions at center-of-mass energy $\sqrt{s} =$ 13 TeV, on the basis of a data sample collected by the CMS experiment, corresponding to an integrated luminosity of 50.8 pb $^{−1}$ . The measurement uses the exclusive decay channel $\mathrm{ B^+ \to J / \psi\ K^+ }$ , with the $\mathrm{ J / \psi }$ decaying to a pair of muons. The results are compared with theory calculations and with measurements made at 7 TeV.
		$\mathrm{ J/\psi\, K^+ }$ Mass Spectrum. Invariant mass distribution of the $\mathrm{ B^+ \to J \psi\ K^+ }$ candidates, integrated in the phase space region 10 $< {p_{\mathrm {T}}} ^{ \mathrm{B} } <$ 100 GeV and ${\| y^{ \mathrm{B} } \| } <$ 2.4. The solid curve shows the result of the fit. The shaded area represents the signal component, while the dashed and dash-dotted curves represent the combinatorial and mis-reconstructed $\mathrm{ B \to J \psi\ K + X }$ background components, respectively.
		Differential cross sections $\mathrm{d} \sigma / \mathrm{d} {p_{\mathrm {T}}} ^{ \mathrm{B} }$ for ${\| y^{ \mathrm{B} } \| } <$ 2.4 (a) and $\mathrm{d}\sigma / \mathrm{d} y^{ \mathrm{B} }$ for 10 $< {p_{\mathrm {T}}} ^{\mathrm{B} }<$ 100 GeV (b), for $\mathrm{B} ^+$ production in pp collisions at $\sqrt {s} =$ 13 TeV.

CMS-PAS-BPH-15-004

Measurement of the

$\mathrm{B}^+$ hadron production cross section in pp collisions at 13 TeV

Compact Muon Solenoid
LHC, CERN