lepton

A class of elementary particle that includes the electron. Leptons are particles of matter that do not feel the strong force. (See also Particles.)

9 results

The delicate balance of lepton flavours

New ATLAS measurement of lepton flavour universality, a key feature of the Standard Model, in decays of the W boson is more precise than all previous measurements combined

News
Physics
26 March, 2024
Physics
News
26 March, 2024

LHCb brings leptons into line

Simultaneous measurements of rare B-meson decays using the full LHC Run 1 and 2 data samples agree with the predictions of the Standard Model, superseding previous results that had indicated intriguing departures from the 50-year old theory

News
Physics
20 December, 2022
Physics
News
20 December, 2022

ATLAS seeks out unusual signatures of long-lived particles

Physicists at the ATLAS experiment are on the hunt for new, long-lived particles to help explain several outstanding mysteries of our Universe

News
Physics
22 March, 2022

Intriguing new result from the LHCb experiment at CERN

The LHCb results strengthen hints of a violation of lepton flavour universality

News
Physics
23 March, 2021

CMS sets new bounds on the mass of leptoquarks

The bounds are some of the tightest yet on the existence of third-generation leptoquarks

News
Physics
18 December, 2020

ATLAS result addresses long-standing tension in the Standard Model

A new ATLAS measurement of a key feature of the Standard Model known as lepton flavour universality suggests that a previous discrepancy measured by the LEP collider in W boson decays may be due to a fluctuation

News
Physics
29 July, 2020

LHCb explores the beauty of lepton universality

For the first time, LHCb uses beauty baryons to test this key principle of the Standard Model

News
Physics
16 January, 2020

The hunt for leptoquarks is on

Recent results from CMS explore third-generation leptoquarks: hypothetical particles that combine the properties of leptons and quarks

News
Physics
19 September, 2018
Physics
News
19 September, 2018

How universal is (lepton) universality?

New results from LHCb suggest that B+mesons decay to muons about 25% less often than they decay to electrons

News
Accelerators
03 June, 2014
Accelerators
News
03 June, 2014