Actions for Missing Mass Recoiling Against the Charged D [electronic resource].

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Missing Mass Recoiling Against the Charged D [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2003.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
14 pages : digital, PDF file
Additional Creators
Stanford Linear Accelerator Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
This paper chronicles the investigation of a peak in the BaBar mass data set of mass recoiling against charged D*s. Our hypothesis is that the peak at 2620 MeV is a reflection of the D{sub s}* and π system. Specifically, we explored the idea that the peak might be a reflection from the decay B → D**⁻ D*{sub s}⁺ with the D**⁻ → D*⁻ π. Theoretically, when the D**⁻ decays, the trajectory of the resulting π will form an angle with the D*{sub s}⁺, and different angles impart difference masses to the system over a range of a GeV or so. If quantum mechanics dictates that their paths will form a particular angle more often than others, a peak would appear in the histogram of their collective mass. Using the Monte Carlo model of particle collision events, Anders Ryd's EVTGEN program, C++ code derived from GeneratorsQA, and PAW, we tested the hypothesis that the peak might be a reflection of the system, but found that this possible explanation could not account for the peak. No 2620 MeV peak appears in the histogram of the system mass. We therefore discount the hypothesis and conclude that some other reflection, statistical fluctuation, or particle is causing the peak.
Report Numbers
E 1.99:slac-tn-03-011
slac-tn-03-011
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
09/05/2003.
"slac-tn-03-011"
Cain, Hillary.
Type of Report and Period Covered Note
Topical;
Funding Information
AC03-76SF00515
View MARC record | catkey: 14709956