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Title: Study of the doubly and singly Cabibbo suppressed decays D+ → K+π-π+ and Ds+ → K+π-π+ in the FOCUS experiment

Abstract

This thesis illustrates a complete study of the doubly and singly Cabibbo suppressed decays D+ and Ds+ → K+ π-π+. Data for this analysis have been collected by the fixed-target high-energy photoproduction experiment FOCUS at Fermilab. The authors have selected the D+ and Ds+ samples with cuts to obtain a sufficiently high statistics, a good signal to noise ratio and, at the same time, eliminate possible contaminations from the more copious and favored decays. The D+ yield consists of 189 ± 24 events, with a signal to noise ratio ~ 1; the Ds+ yield is 567 ± 31 and the signal to noise ratio is ~ 2.5. The authors have measured Γ(D+ → K+π-π+)/Γ(D+ → K-π+π+) = 0.0065 ± 0.0008 ± 0.004 and Γ(Ds+ → K+π-π+)/Γ(Ds+ → K+K-π+) = 0.127 ± 0.007 ± 0.014, improving the previous determinations of a factor of 2 and 5, respectively. The author has also performed a Dalitz plot analysis for both decays. The amplitude analysis for Ds+ → K+π-π+ represents the first available measurement for this channel.

Authors:
 [1]
  1. Univ. of Milan (Italy)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15020131
Report Number(s):
FERMILAB-THESIS-2005-26
TRN: US0605060
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; DALITZ PLOT; FERMILAB; PHOTOPRODUCTION; SIGNAL-TO-NOISE RATIO; STATISTICS; Experiment-HEP

Citation Formats

Edera, Laura. Study of the doubly and singly Cabibbo suppressed decays D+ → K+π-π+ and Ds+ → K+π-π+ in the FOCUS experiment. United States: N. p., 2005. Web. doi:10.2172/15020131.
Edera, Laura. Study of the doubly and singly Cabibbo suppressed decays D+ → K+π-π+ and Ds+ → K+π-π+ in the FOCUS experiment. United States. https://doi.org/10.2172/15020131
Edera, Laura. 2005. "Study of the doubly and singly Cabibbo suppressed decays D+ → K+π-π+ and Ds+ → K+π-π+ in the FOCUS experiment". United States. https://doi.org/10.2172/15020131. https://www.osti.gov/servlets/purl/15020131.
@article{osti_15020131,
title = {Study of the doubly and singly Cabibbo suppressed decays D+ → K+π-π+ and Ds+ → K+π-π+ in the FOCUS experiment},
author = {Edera, Laura},
abstractNote = {This thesis illustrates a complete study of the doubly and singly Cabibbo suppressed decays D+ and Ds+ → K+ π-π+. Data for this analysis have been collected by the fixed-target high-energy photoproduction experiment FOCUS at Fermilab. The authors have selected the D+ and Ds+ samples with cuts to obtain a sufficiently high statistics, a good signal to noise ratio and, at the same time, eliminate possible contaminations from the more copious and favored decays. The D+ yield consists of 189 ± 24 events, with a signal to noise ratio ~ 1; the Ds+ yield is 567 ± 31 and the signal to noise ratio is ~ 2.5. The authors have measured Γ(D+ → K+π-π+)/Γ(D+ → K-π+π+) = 0.0065 ± 0.0008 ± 0.004 and Γ(Ds+ → K+π-π+)/Γ(Ds+ → K+K-π+) = 0.127 ± 0.007 ± 0.014, improving the previous determinations of a factor of 2 and 5, respectively. The author has also performed a Dalitz plot analysis for both decays. The amplitude analysis for Ds+ → K+π-π+ represents the first available measurement for this channel.},
doi = {10.2172/15020131},
url = {https://www.osti.gov/biblio/15020131}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2005},
month = {Sat Jan 01 00:00:00 EST 2005}
}

Thesis/Dissertation:
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