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PRELIMINARY STUDY OF D0 ---] K PI PI0 DECAYS WITH DALITZ PLOTS.

PRELIMINARY STUDY OF D0 ---] K PI PI0 DECAYS WITH DALITZ PLOTS. PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Particle physicists study the smallest particles and most basic rules of their interactions in humankind's current scope. The Charm Analysis Working Group (CWG) of the BaBar Collaboration studies decays involving the charm quark. They currently study mixing in D decays, an interesting and poorly understood phenomenon in current physics models. We, as part of the CWG, investigated the plausibility of using Dalitz plots and the BaBar analysis framework to study mixing in Wrong Sign (WS) D[sup 0][yields] K[pi][pi][sup 0] decays. Others in the CWG have studied mixing in the 2-body decay, D[sup 0][yields] K[pi]. The 3-body decay analyzed with the RooFitDalitz analysis package and Dalitz plots provides more information and another way of separating Doubly Cabibbo Suppressed Decays (DCSD) from mixing--which share the same end products. Through doing many simulations, we have demonstrated the usefulness of this approach. We selected D[sup 0][yields] K[pi][pi][sup 0] events from Simulation Production run No. 4 (SP4) and BaBar's run 1 and run 2. We made Dalitz plots with this data. Now that we better understand Dalitz plots and software, we plan to select WS D[sup 0][yields] K[pi][pi][sup 0] events and perform rate fits as discussed in BaBar Analysis Document (BAD) No. 443, as well as fits for several different decay times and resonances, in order to further distinguish DCSD from mixing.

PRELIMINARY STUDY OF D0 ---] K PI PI0 DECAYS WITH DALITZ PLOTS.

PRELIMINARY STUDY OF D0 ---] K PI PI0 DECAYS WITH DALITZ PLOTS. PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Particle physicists study the smallest particles and most basic rules of their interactions in humankind's current scope. The Charm Analysis Working Group (CWG) of the BaBar Collaboration studies decays involving the charm quark. They currently study mixing in D decays, an interesting and poorly understood phenomenon in current physics models. We, as part of the CWG, investigated the plausibility of using Dalitz plots and the BaBar analysis framework to study mixing in Wrong Sign (WS) D[sup 0][yields] K[pi][pi][sup 0] decays. Others in the CWG have studied mixing in the 2-body decay, D[sup 0][yields] K[pi]. The 3-body decay analyzed with the RooFitDalitz analysis package and Dalitz plots provides more information and another way of separating Doubly Cabibbo Suppressed Decays (DCSD) from mixing--which share the same end products. Through doing many simulations, we have demonstrated the usefulness of this approach. We selected D[sup 0][yields] K[pi][pi][sup 0] events from Simulation Production run No. 4 (SP4) and BaBar's run 1 and run 2. We made Dalitz plots with this data. Now that we better understand Dalitz plots and software, we plan to select WS D[sup 0][yields] K[pi][pi][sup 0] events and perform rate fits as discussed in BaBar Analysis Document (BAD) No. 443, as well as fits for several different decay times and resonances, in order to further distinguish DCSD from mixing.

Study of the D0 \to Pi Pi- Pi0 Decay at BaBar

Study of the D0 \to Pi Pi- Pi0 Decay at BaBar PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8

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Book Description
The Dalitz-plot of the decay D° →??−?° measured by the BABAR collaboration shows the structure of a final state having quantum numbers I{sup G}J{sup PC} = 0−02−. An isospin analysis of this Dalitz-plot finds that the fraction of the I = 0 contribution is about 96%. This high I = 0 contribution is unexpected because the weak interaction violates the isospin.

Dalitz Plot Analysis of D0 Hadronic Decays D0-]K0K-pi+, D0-]antiK0K+pi- and D0-]antiK0K+K-

Dalitz Plot Analysis of D0 Hadronic Decays D0-]K0K-pi+, D0-]antiK0K+pi- and D0-]antiK0K+K- PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5

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Book Description
A Dalitz plot analysis of the D° hadronic decays D° → K°K−?, D° → {bar K}° K+?− and D° → {bar K}° K+ K− is presented. This analysis is based on a data sample of 22 fb−1 collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC running on or near the?(4S) resonance. The events are selected from continuum e+e− annihilations using the decay D*+ → D°?+. Preliminary measurements of the branching fractions of the above hadronic decays are obtained. Preliminary estimates of fractions and phases for resonant and nonresonant contributions to the Dalitz plot are also presented.

B0 --] K+ Pi- Pi0 Dalitz Plot Analysis

B0 --] K+ Pi- Pi0 Dalitz Plot Analysis PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5

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Book Description
The authors present preliminary results on the Dalitz plot analysis of B° --> K?−?° decays. The data sample comprises 213 million?(4S) --> B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They report measurements of the inclusive branching fraction, quasi-two-body fractions and CP-violating charge asymmetries for intermediate states including K*(892)+?− and?(770)−K+. Observations of B° decays to the K?S-wave intermediate states, K0*(1430)+?− and K0*(1430)°?°, are reported. Evidence of the decay B° --> K*(892)°?° is seen. They set upper limits at 90% confidence level on branching fractions of the nonresonant and other less significant intermediate states.

Dalitz-plot Analysis of B0 -] Anti-D0 Pi Pi-

Dalitz-plot Analysis of B0 -] Anti-D0 Pi Pi- PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 15

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Book Description
The authors report preliminary results from a study of the decay B° → {bar D}°??− using a data sample of 470.9 ± 2.8 million B{bar B} events collected with the BABAR detector at the?(4S) resonance. Using the Dalitz-plot analysis technique, they find contributions from the intermediate resonances D*2(2460)−, D*0(2400)−,?(770)° and f2(1270) as well as a?+?− S-wave term, a {bar D}°?− nonresonant S-wave term and a virtual D*(2010) amplitude. They measure the branching fractions of the contributing decays.

Empirical Parameterization of the K - \to Pi - Pi0 Pi0 Decay Dalitz Plot

Empirical Parameterization of the K - \to Pi - Pi0 Pi0 Decay Dalitz Plot PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9

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Book Description

Study of the Decay K/sup 0//sub L/. --]. Pi. E. Nu

Study of the Decay K/sup 0//sub L/. --]. Pi. E. Nu PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Results are reported from a Dalitz plot analysis of 17750 K/sup 0//sub e3/ candidates obtained in an experiment designed to study both the semileptonic and 3.pi. decay modes of the K/sup 0//sub L/ with high efficiency across the Dalitz plot.

Dalitz Plot Analysis of the Decay B0(B0bar) to K+̂/- Pi-̂/+ Pi0

Dalitz Plot Analysis of the Decay B0(B0bar) to K+̂/- Pi-̂/+ Pi0 PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 30

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Book Description
The authors report a Dalitz-plot analysis of the charmless hadronic decays of neutral B mesons to K{sup ±}?{sup {-+}}?°. With a sample of (231.8 ± 2.6) x 106?(4S) → B{bar B} decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, they measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for B° and {bar B}° decays and determine the corresponding CP-averaged branching fractions and charge asymmetries. The inclusive branching fraction and CP-violating charge asymmetry are measured to be?(B° → K?−?°) = (35.7{sub -1.5}{sup +2.6} ± 2.2) x 10−6, and?{sub CP} = -0.030{sub -0.051}{sup +0.045} ± 0.055 where the first errors are statistical and the second systematic. They observe the decay B° → K*°(892)?° with the branching fraction?(B° → K*°(892)?°) = (3.6{sub -0.8}{sup +0.7} ± 0.4) x 10−6. This measurement differs from zero by 5.6 standard deviations (including the systematic uncertainties). The selected sample also contains B° → {bar D}°?° decays where {bar D}° → K+?−, and they measure?(B° → {bar D}°?°) = (2.93 ± 0.17 {+-} 0.18) x 10−4.

Study of the Decay K°

Study of the Decay K° PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Results are reported from a Dalitz plot analysis of 17750 K°/sub e3/ candidates obtained in an experiment designed to study both the semileptonic and 3.pi. decay modes of the K°/sub L/ with high efficiency across the Dalitz plot.

Dalitz Plot Analysis of $B^0_d \to K+ \pi^- \pi^0$ Decays

Dalitz Plot Analysis of $B^0_d \to K+ \pi^- \pi^0$ Decays PDF Author: Zhitang Yu
Publisher:
ISBN:
Category :
Languages : en
Pages : 177

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Book Description
This thesis describes a Dalitz plot analysis of B{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} decays. The data sample comprises 213 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center in California (SLAC). Preliminary results are presented for measurements of the inclusive branching fraction, quasi-two-body fractions and CP-violating charge asymmetries for intermediate states including K*(892){sup +}{pi}{sup -} and {rho}(770){sup -}K{sup +}. Observations of B{sup 0} decays to the K{pi} S-wave intermediate states, K*{sub 0}(1430){sup +}{pi}{sup -} and K*{sub 0}(1430){sup 0}{pi}{sup 0}, are reported. Evidence of the decay B{sup 0} {yields} K*(892){sup 0}{pi}{sup 0} is seen. We set upper limits at 90% confidence level on branching fractions of the nonresonant and other less significant intermediate states.