Publication

Measurement of the time-dependent CP asymmetry in B-0 -> J/psi K-S(0) decays

Abstract

This Letter reports a measurement of the CP violation observables S-J/psi KS0 and C-J/psi KS0 in the decay channel B-0 -> J/psi K-S(0) performed with 1.0 fb(-1) of pp collisions at root s = 7 TeV collected by the LHCb experiment. The fit to the data yields S-J/psi KS0 = 0.73 +/- 0.07(stat) +/- 0.04(syst) and C-J/psi KS0 = 0.03 +/- 0.09(stat) +/- 0.01 (syst). Both values are consistent with the current world averages and within expectations from the Standard Model. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.

Official source

Abstract

Official source

Related concepts (20)

LHCb experiment

The LHCb (Large Hadron Collider beauty) experiment is a particle physics detector experiment collecting data at the Large Hadron Collider at CERN. LHCb is a specialized b-physics experiment, designed primarily to measure the parameters of CP violation in the interactions of b-hadrons (heavy particles containing a bottom quark). Such studies can help to explain the matter-antimatter asymmetry of the Universe. The detector is also able to perform measurements of production cross sections, exotic hadron spectroscopy, charm physics and electroweak physics in the forward region.

Standard Model

The Standard Model of particle physics is the theory describing three of the four known fundamental forces (electromagnetic, weak and strong interactions – excluding gravity) in the universe and classifying all known elementary particles. It was developed in stages throughout the latter half of the 20th century, through the work of many scientists worldwide, with the current formulation being finalized in the mid-1970s upon experimental confirmation of the existence of quarks.

Large Hadron Collider

The Large Hadron Collider (LHC) is the world's largest and highest-energy particle collider. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories, as well as more than 100 countries. It lies in a tunnel in circumference and as deep as beneath the France–Switzerland border near Geneva. The first collisions were achieved in 2010 at an energy of 3.

Related publications (32)

Measurement of the time-dependent CP asymmetry in B-0 -> J/psi K-S(0) decays

Graph Chatbot

Search for the lepton flavour violating decays B0→e±μ∓ and B0s→e±μ∓ with LHCb Run 2 data

Measurement of the τ lepton polarization in Z boson decays in proton-proton collisions at √s=13 TeV

Search for Scalar Leptoquarks Produced via τ-Lepton-Quark Scattering in pp Collisions at ffiffi s p=13 TeV