en
Scientific article
Open access
English

Measurement of the B lifetime using a simulation free approach for trigger bias correction

ContributorsCDF Collaboration
Publication date2011
Abstract

The collection of a large number of B-hadron decays to hadronic final states at the CDF II Detector is possible due to the presence of a trigger that selects events based on track impact parameters. However, the nature of the selection requirements of the trigger introduces a large bias in the observed proper-decay-time distribution. A lifetime measurement must correct for this bias, and the conventional approach has been to use a Monte Carlo simulation. The leading sources of systematic uncertainty in the conventional approach are due to differences between the data and the Monte Carlo simulation. In this paper, we present an analytic method for bias correction without using simulation, thereby removing any uncertainty due to the differences between data and simulation. This method is presented in the form of a measurement of the lifetime of the B− using the mode B−→D0π−. The B− lifetime is measured as τB−=1.663±0.023±0.015 ps, where the first uncertainty is statistical and the second systematic. This new method results in a smaller systematic uncertainty in comparison to methods that use simulation to correct for the trigger bias.

Citation (ISO format)
CDF Collaboration. Measurement of the <em>B<sup>−</sup></em> lifetime using a simulation free approach for trigger bias correction. In: Physical review. D. Particles, fields, gravitation, and cosmology, 2011, vol. 83, n° 03, p. 032008. doi: 10.1103/PhysRevD.83.032008
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal1550-2368
501views
134downloads

Technical informations

Creation08/04/2014 4:24:00 PM
First validation08/04/2014 4:24:00 PM
Update time03/14/2023 9:29:39 PM
Status update03/14/2023 9:29:39 PM
Last indexation01/16/2024 11:29:07 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack