Measurement of the Lambda(b)0 lifetime in pp collisions at sqrt(s) = 7 TeV

TL;DR

This paper reports a precise measurement of the Lambda(b)0 baryon lifetime in proton-proton collisions at 7 TeV using CMS data, providing important insights into heavy baryon decay properties.

Contribution

The study presents the first measurement of Lambda(b)0 lifetime at 7 TeV with high precision using CMS data and dimuon triggers.

Findings

Lambda(b)0 lifetime measured as 1.503 ps

Measurement uncertainty includes statistical and systematic errors

Results align with theoretical predictions and previous measurements

Abstract

A measurement of the Lambda(b)0 lifetime using the decay Lambda(b)0 to J/Psi Lambda in proton-proton collisions at sqrt(s) = 7 TeV is presented. The data set, corresponding to an integrated luminosity of about 5 inverse femtobarns, was recorded with the CMS experiment at the Large Hadron Collider using triggers that selected dimuon events in the J/Psi mass region. The Lambda(b)0 lifetime is measured to be 1.503 +/- 0.052 (stat.) +/- 0.031 (syst.) ps.