2 Beta Gamma From B 0 To D Mp K 0 Pi Pm Decays At Babar

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2 Beta Gamma From B 0 To D Mp K 0 Pi Pm Decays At Babar

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Author :
language : en
Publisher:
Release Date : 2007

2 Beta Gamma From B 0 To D Mp K 0 Pi Pm Decays At Babar 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.

The authors present the results of a simulation study to perform the extraction of 2[beta] + [gamma] from B° → D{sup {-+}}K°[pi]{sup {+-}} decays through a time-dependent Dalitz analysis of BaBar data.

Time Dependent Dalitz Analysis Of B0 D K0 Pi Decays For The Measurement Of 2beta Gamma With The Babar Detector

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Author : Francesco Polci
language : en
Publisher:
Release Date : 2007

Time Dependent Dalitz Analysis Of B0 D K0 Pi Decays For The Measurement Of 2beta Gamma With The Babar Detector written by Francesco Polci 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.

The CP violation is explained in the Standard Model with three quark generations with an irreducible phase in the Cabibbo-Kobayashi-Maskawa quark mixing matrix. The unitarity of this matrix can be represented in a complex plane as a triangle (called Unitarity Triangle). The measurement of the parameters of the triangle is a powerful test of the Standard Model description of the CP violation. This thesis tries to measure the weak phase 2beta+ gamma through the B0 -> D+ K0 Pi- decays. Respect to the two body decays B0 -> D(*)+ Pi- and B0 -> D+ Rho- presently used for the measurement of the same weak phase, the B0 -> D+ K0 Pi- decays should show up a larger CP asymmetry and does not rely on any theoretical assumption. After a review of all the methods for the measurement of 2beta+gamma, the thesis presents the results of a feasibility study of the measurement with the B0 -> D+ K0 Pi- decays . In a second part, the analysis performed on 316 fb-1 of data collected by the BaBar detector at the B-factory PEP2 is presented, from the selection of the events to the time-dependent Dalitz fit technique used in order to extract the weak phase 2beta+gamma as well as the amplitudes and phases of the intermediate resonances contributing to the decay. The result of the analysis gives the following estimation: 2beta+gamma = 89 +/- 53(stat) +23-14(syst) degrees with an irreducible ambiguity of 180 degrees.

Measuring Gamma With B0 To D0 K 0 Decays At Babar

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Author :
language : en
Publisher:
Release Date : 2007

Measuring Gamma With B0 To D0 K 0 Decays At Babar 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.

We present a feasibility study for a new analysis for extracting the angle of the Unitarity Triangle from the study of the neutral B meson decays. We reconstruct the decay channel B° → {bar D}°K*° with the K*° → K?− and the {bar D}° → K{sub S}?+?− using a D° Dalitz analysis technique. The sensitivity to the angle comes from the interference of the b → c and b → u processes contributing to the same final state and by the fact that the B°({bar B}°) can be unambiguously identified through the sign of electric charge of the kaon from K*°({bar K}*°) decay. The impact of the result of such analysis is evaluated for the actual BaBar statistics.

Henri Iv De Luigi Pirandelo

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Author :
language : en
Publisher:
Release Date : 1950

Henri Iv De Luigi Pirandelo written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1950 with categories.

Charmless B Decays From Babar B0 K 0 Gamma And B0 Pi Pi K Pi K K

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Author :
language : en
Publisher:
Release Date : 2001

Charmless B Decays From Babar B0 K 0 Gamma And B0 Pi Pi K Pi K K written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

The BaBar experiment has completed its first year of data-taking during which 21 fb−1 of data were accumulated. We present preliminary results on two types of charmless B decays based on this data sample. The first, B° 2!K*°[gamma], is a so-called electromagnetic penguin. And the second, B° 2!h h'− can be either a pion or kaon, can come from either penguin diagrams or Cabibbo suppressed tree diagrams.

Rare B Decays In Babar

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Author :
language : en
Publisher:
Release Date : 2004

Rare B Decays In Babar 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.

Measurements and searches for rare B decays have been performed with the BaBar detector at the PEP-II e[sup +]e[sup -] asymmetric B Factory, operating at the [Upsilon](4S) resonance. The authors report some recent branching fraction measurements on hadronic and radiative B decays, occurring from b --> s/d and b --> u transitions. Most of the results presented here are based on a data sample corresponding to a luminosity of 81.9 fb[sup -1].

Recent Results From The Babar Experiment

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Author :
language : en
Publisher:
Release Date : 2004

Recent Results From The Babar Experiment 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.

The authors present an overview of some of the most recent results from the BABAR experiment. They discuss the latest measurement of the time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates, that in the Standard Model (SM) is proportional to sin 2[beta]. They present measurements of branching fractions and CP-violating asymmetries in neutral B decays to two-body final states of charged pions and kaons, that are related to the angle [alpha] of the Unitarity Triangle. They also report the B[sup 0] lifetime measurement obtained from studying the B[sup 0] [yields] D*[sup -] [pi][sup +] and B[sup 0] [yields] D*[sup -] [rho][sup +] decay channels and the B[sup 0] [yields] D*[sup -] a[sub 1][sup +] branching fraction, obtained using a partial reconstruction technique. These measurements serve as a test and validation of the procedures required to measure the combination of CKM Unitarity Triangle angles sin(2[beta] + [gamma]).

Measurement Of Gamma In B To D K And B To D K Decays With A Dalitz Analysis Of D To Ks Pi Pi

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

Measurement Of Gamma In B To D K And B To D K Decays With A Dalitz Analysis Of D To Ks 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.

We present a measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase {gamma} with a Dalitz plot analysis of neutral D-meson decays to the K{sub S}{sup 0} {pi}{sup -}{pi}{sup +} final state from B{sup {-+}} {yields} D{sup (*)}K{sup {-+}} and B{sup {-+}} {yields} DK*{sup {-+}} decays, using a sample of 227 million B{bar B} pairs collected by the BABAR detector. We measure {gamma} = (67 {+-} 28 {+-} 13 {+-} 11){sup o}, where the first error is statistical, the second is the experimental systematic uncertainty and the third reflects the Dalitz model uncertainty. This result suffers from a two-fold ambiguity. The contribution to the Dalitz model uncertainty due to the description of the {pi}{pi} S-wave in D{sup 0} {yields} K{sub S}{sup 0}{pi}{sup -}{pi}{sup +}, evaluated using a K-matrix formalism, is found to be 3{sup o}.

Babar

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Author : D. Hutchcroft
language : en
Publisher:
Release Date : 2006

Babar written by D. Hutchcroft and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

Three two body and two resonance decays of the B mesons have been measured using data from the BABAR detector: B{sup 0} {yields} {pi}{sup {+-}}, K{sup {-+}}, K{sup +}K{sup -}, K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and B{sup 0} {yields} a{sub 1}{sup +}(1260){pi}{sup -}. The branching ratio and that of some intermediate resonances are presented along with the Cp asymmetry of the decay B{sup 0} {yields} K*{sup +}{pi}{sup -}.

Measurement Of B K Gamma Branching Fractions And Charge Asymmetries

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Author :
language : en
Publisher:
Release Date : 2002

Measurement Of B K Gamma Branching Fractions And Charge Asymmetries written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.

The branching fractions of the exclusive decays B[sup 0][yields] K*[sup 0][gamma] and B[sup+][yields] K*[sup+][gamma] are measured. from a sample of (22.74[+-] 0.36) x 10[sup 6] B[bar B] decays collected with the BABAR detector at the PEP II asymmetric e[sup+]e[sup -] collider. We find[Beta](B[sup 0][yields] K*[sup 0][gamma])= (4.23[+-] 0.40(stat.)[+-] 0.22(sys.)) x 10[sup -5], [Beta](B[sup+][yields] K*[sup+][gamma])= (3.83[+-] 0.62(stat.)[+-] 0.22(sys.)) x 10[sup -5] and constrain the CP-violating charge asymmetry to be -0.170