We present the first measurement of the mass of the top quark in a sample of t (t) over bar -> l (nu)over bar b (b) over bar q (q) over bar events (where l = e, mu) selected by identifying jets containing a muon candidate from the semileptonic decay of heavy-flavor hadrons (soft muon b tagging). The p (p) over bar collision data used correspond to an integrated luminosity of 2 fb(-1) and were collected by the CDF II detector at the Fermilab Tevatron Collider. The measurement is based on a novel technique exploiting the invariant mass of a subset of the decay particles, specifically the lepton from the W boson of the t -> Wb decay and the muon from a semileptonic b decay. We fit template histograms, derived from simulation of t (t) over bar events and a modeling of the background, to the mass distribution observed in the data and measure a top quark mass of (180.5 +/- 12.0(stat) +/- 3.6(syst)) GeV/c(2), consistent with the current world average value.

T., A., J., A., T., A., B. A., G., S., A., D., A., et al. (2009). Measurement of the top quark mass using the invariant mass of lepton pairs in soft muon b-tagged events. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 80, 051104-1-051104-9 [10.1103/PhysRevD.80.051104].

Measurement of the top quark mass using the invariant mass of lepton pairs in soft muon b-tagged events

CIOCCI, MARIA AGNESE;
2009-01-01

Abstract

We present the first measurement of the mass of the top quark in a sample of t (t) over bar -> l (nu)over bar b (b) over bar q (q) over bar events (where l = e, mu) selected by identifying jets containing a muon candidate from the semileptonic decay of heavy-flavor hadrons (soft muon b tagging). The p (p) over bar collision data used correspond to an integrated luminosity of 2 fb(-1) and were collected by the CDF II detector at the Fermilab Tevatron Collider. The measurement is based on a novel technique exploiting the invariant mass of a subset of the decay particles, specifically the lepton from the W boson of the t -> Wb decay and the muon from a semileptonic b decay. We fit template histograms, derived from simulation of t (t) over bar events and a modeling of the background, to the mass distribution observed in the data and measure a top quark mass of (180.5 +/- 12.0(stat) +/- 3.6(syst)) GeV/c(2), consistent with the current world average value.
2009
T., A., J., A., T., A., B. A., G., S., A., D., A., et al. (2009). Measurement of the top quark mass using the invariant mass of lepton pairs in soft muon b-tagged events. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 80, 051104-1-051104-9 [10.1103/PhysRevD.80.051104].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/38764
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