What question did this study set out to answer?

The aim is to measure the double-differential cross sections of J/ψ and ψ(2S) mesons in pp collisions at 7 TeV.

March 7, 2026

Measurement of J/ψ and ψ(2S) Prompt Double-Differential Cross Sections in pp Collisions at s√=7 TeV

Key Points

The aim is to measure the double-differential cross sections of J/ψ and ψ(2S) mesons in pp collisions at 7 TeV.
Analyzed dimuon samples collected by the CMS experiment.
Used two-dimensional analysis of dimuon invariant mass and decay length.
Measured transverse momentum p(T) up to 120 GeV for J/ψ and 100 GeV for ψ(2S).
Focused on the rapidity range of |y| < 1.2.
Reported cross sections for J/ψ and ψ(2S) mesons.
Determined the ratio of ψ(2S) to J/ψ cross sections for |y| < 1.2.
Achieved highest p(T) measurements for these cross sections.

Abstract

The double-differential cross sections of promptly produced J/psi and psi (2S) mesons are measured in pp collisions at root s = 7 TeV, as a function of transverse momentum p (T) and absolute rapidity \. The analysis uses J/psi and psi (2S) dimuon samples collected by the CMS experiment, corresponding to integrated luminosities of 4. 55 and 4. 90 fb (-1), respectively. The results are based on a two-dimensional analysis of the dimuon invariant mass and decay length, and extend to p (T) = 120 and 100 GeV for the J/psi and psi (2S), respectively, when integrated over the interval \ 1. 2. The ratio of the psi (2S) to J/psi cross sections is also reported for \ 1. 2, over the range 10 p (T) 100 GeV. These are the highest p (T) values for which the cross sections and ratio have been measured.

Bookmark

Measurement of J/ψ and ψ(2S) Prompt Double-Differential Cross Sections in pp Collisions at s√=7 TeV

Key Points

Abstract

Cite This Study

Also Consider

Also Consider