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Experimental High Energy Physics

Publications

Spin and parity measurement of the Λ(1405) baryon

Publicaciones

Spin and parity measurement of the Λ(1405) baryon

Research areas:

Física Experimental de Alta Energía

Year:

2013

Type of Publication:

In Proceeding

Authors:

Journal:

Phys. Rev. Lett

Volume:

112

Pages:

6

Abstract:

A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb−1 data sample of proton–proton collisions at √s = 7 TeV recorded with the ATLAS detector at the LHC, events consistent with ttbar production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields Δm≣mt−mt¯ = 0.67 ± 0.61(stat) ± 0.41(syst) GeV, consistent with CPT invariance.

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