An Amplitude Analysis Of The Four Body Decay D 0 To K K Pi Pi And A Study On The Pi Pi S Wave For The Decay D 0 To Ks0pi Pi

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An Amplitude Analysis Of The Four Body Decay D 0 To K K Pi Pi And A Study On The Pi Pi S Wave For The Decay D 0 To Ks0pi Pi

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Author : Lauren Martin
language : en
Publisher:
Release Date : 2011

An Amplitude Analysis Of The Four Body Decay D 0 To K K Pi Pi And A Study On The Pi Pi S Wave For The Decay D 0 To Ks0pi Pi written by Lauren Martin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.

An Amplitude Analysis Of The Decay B Pi Pi Pi

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Author : J. C. Chen
language : en
Publisher:
Release Date : 2005

An Amplitude Analysis Of The Decay B Pi Pi Pi written by J. C. Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The authors present a Dalitz-plot analysis of charmless B{sup {+-}} decays to the final state {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}} using 210 fb{sup -1} of data recorded by the BABAR experiment at {radical}s = 10.58 GeV. We measure the branching fractions {Beta}(B{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}}) = (16.2 {+-} 1.2 {+-} 0.9) x 10{sup -6} and {Beta}(B{sup {+-}} {yields} {rho}{sup 0}(770){pi}{sup {+-}}) = (8.8 {+-} 1.0 {+-} 0.6{sub -0.7}{sup +0.1}) x 10{sup -6}. Measurements of branching fractions for the quasi-two-body decays B{sup {+-}} {yields} {rho}{sup 0}(1450){pi}{sup {+-}}, B{sup {+-}} {yields} f{sub 0}(980){pi}{sup {+-}} and B{sup {+-}} f{sub 2}(1270){pi}{sup {+-}} are also presented. They observe no charge asymmetries for the above modes, and there is no evidence for the decays B{sup {+-}} {yields} {chi}{sub c0}{pi}{sup {+-}}, B{sup {+-}} {yields} f{sub 0}(1370){pi}{sup {+-}} and B{sup {+-}} {yields} {sigma}{pi}{sup {+-}}.

A Partial Wave Analysis Of The Decay D 0 K 0 S Pi Pi

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Author : ARGUS Collaboration
language : en
Publisher:
Release Date : 1993

A Partial Wave Analysis Of The Decay D 0 K 0 S Pi Pi written by ARGUS Collaboration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.

Study Of The S Wave K Pi 2 Amplitude Using The Decay D 2 K Pi Pi

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Author :
language : en
Publisher:
Release Date : 2007

Study Of The S Wave K Pi 2 Amplitude Using The Decay D 2 K Pi Pi written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

In this work the S-wave component of the K[pi] amplitude from decay of D+ → K+[pi]+[pi]+ it is directly measured. The data come from the Fermilab E831/FOCUS experiment. The amplitude measurement is made using the partial wave analysis without any preliminary assumption about the nature of the S-wave component of the K[pi] system. The phase and magnitude of the S-wave amplitude are generic functions to be determined directly through the Dalitz plot fit. For the sake of comparison, our results the same decay is analyzed using the isobar model, which is the standard way to analyze the Dalitz plot. The data fit obtained with the partial wave analysis is better than the data fit from the isobar model. The phase variation with respect to the invariant mass K[pi] is compared with the measurement of the phase [Delta]$0\atop{I=1/2}$ (mK[pi]) from K[pi] → K[pi] scattering. The difference between both analysis is discussed considering: a difference in the composition of the isospin components I = 1/2 and I = 3/2 of the K[pi] system between D+ decay and the K[pi] → K[pi] scattering; and the final state interaction involving all particles from decay.

Amplitude Analysis Of The Decay D S To Pi Pi Pi In The Experiment E831 Focus

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Author :
language : en
Publisher:
Release Date : 2005

Amplitude Analysis Of The Decay D S To Pi Pi Pi In The Experiment E831 Focus written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

We present in this thesis the Dalitz Plot analysis of the D{sub s} →?+?−?+ decay, with the data of the E831/FOCUS, that took data in 1996 and 1997. The masses and widhts of f0(980) and f0(1370) are free parametres of the fit on Dalitz Plot, objectiving to study in detail these resonances. After this analysis we present the Spectator Model study on the S wave in this decay. For this study we used the formalism developed by M. Svec [2] for scattering. We present the comparison between the Isobar Model, frequently used in Dalitz Plot analysis, and this formalism.

Preliminary Study Of D0 K Pi Pi0 Decays With Dalitz Plots

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Author :
language : en
Publisher:
Release Date : 2003

Preliminary Study Of D0 K Pi Pi0 Decays With Dalitz Plots written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

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.

Measurement Of The K Pi S Wave System In D K Pi Pi Decays From Fermilab E791

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Author : B. Meadows
language : en
Publisher:
Release Date : 2005

Measurement Of The K Pi S Wave System In D K Pi Pi Decays From Fermilab E791 written by B. Meadows and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

A new approach to the analysis of three body decays is presented. Measurements of the S-wave K{pi} amplitude are made in independent ranges of invariant mass from threshold up to the upper kinematic limit in D{sup +} {yields} K{sup -}{pi}{sup +}{pi}{sup +} decays. These are compared with results obtained from a fit where the S-wave is assumed to have {kappa} and K{sub 0}{sup +}(1430) resonances. Results are also compared with measurements of K{sup -} {pi}{sup +} elastic scattering. Contributions from I = 1/2 and I = 3/2 are not resolved in this study. If I = 1/2 dominates, however, the Watson theorem prediction, that the phase behavior below K{eta}' threshold should match that in elastic scattering, is not well supported by these data. Production of K{sup -} {pi}{sup +} from these D decays is also studied.

A Partial Wave Analysis Of The Decay D K S K S Pi Pi

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Author :
language : de
Publisher:
Release Date : 1993

A Partial Wave Analysis Of The Decay D K S K S Pi Pi written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.

Model Independent Measurement Of S Wave K Pi Systems Using D K Pi Pi Decays From Fermilab E791

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Author :
language : en
Publisher:
Release Date : 2005

Model Independent Measurement Of S Wave K Pi Systems Using D K Pi Pi Decays From Fermilab E791 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

A model-independent partial-wave analysis of the S-wave component of the K? system from decays of D mesons to the three-body K−?+?+ final state is described. Data come from the Fermilab E791 experiment. Amplitude measurements are made independently for ranges of K−?+ invariant mass, and results are obtained below 825 MeV/c2, where previous measurements exist only in two mass bins. This method of parametrizing a three-body decay amplitude represents a new approach to analyzing such decays. Though no model is required for the S-wave, a parametrization of the relatively well-known reference P- and D-waves, optimized to describe the data used, is required. The observed phase variation for the S-, P- and D-waves do not match existing measurements of I = 1/2 K−?+ scattering in the invariant mass range in which scattering is predominantly elastic. If the data are mostly I = 1/2, this observation indicates that the Watson theorem, which requires these phases to have the same dependence on invariant mass, does not apply to these decays. The production rate of K−?+ from these decays, if assumed to be predominantly I = 1/2, is also found to have a significant dependence on invariant mass in the region above 1.25 GeV/c2. These measurements can provide a relatively model-free basis for future attempts to determine which strange scalar amplitudes contribute to the decays.

Study Of The D0 K K Pi Pi

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Author :
language : en
Publisher:
Release Date : 2004

Study Of The D0 K K Pi Pi written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

Using data from the FOCUS (E831) experiment at Fermilab, the authors present a new measurement for the Cabibbo-suppressed decay mode D° 2!KK−?+?−. They measure:?(D° 2!K+K−?+?−)/?(D° 2!K−?−?+?+) = 0.0295 ± 0.0011 ± 0.0008. An amplitude analysis has been performed in order to determine the resonant substructure of this decay mode. The dominant components are the decays D° 2!K1(1270)+ K−, D° 2!K1(1400)+K− and D° 2!?(770)°?(1020).