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Measurement Of Branching Fractions And Resonance Contributions For B0 D0bar K Pi And Search For B0 D0 K Pi Decays
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Book Synopsis Measurement of Branching Fractions and Resonance Contributions for B0 -] D0bar K+ Pi- and Search for B0 -] D0 K+ Pi- Decays by :
Download or read book Measurement of Branching Fractions and Resonance Contributions for B0 -] D0bar K+ Pi- and Search for B0 -] D0 K+ Pi- Decays written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using 226 million?(4S) → B{bar B} events collected with the BABAR detector at the PEp-II ee− storage ring at the Stanford Linear Accelerator Center, they measure the branching fraction for B° → {bar D}°K+?−, excluding B° → D*−K+, to be?(B° → {bar D}°K+?−) = 88 ± 15 ± 9 x 10−6. They observe B° → {bar D}°K*(892)° and B° → D*2(2460)−K+ contributions. The ratio of branching fractions?(B° → D*− K+)/?(B° → D*−?+) = (7.76 ± 0.34 ± 0.29)% is measured separately. The branching fraction for the suppressed mode B° → D°K+?− is?(B° → D°K+?−)
Book Synopsis Improved Measurements of the Branching Fractions for B0 Into Pi+pi- and B0 Into K+pi-, and a Search for B0 Into K+K- by :
Download or read book Improved Measurements of the Branching Fractions for B0 Into Pi+pi- and B0 Into K+pi-, and a Search for B0 Into K+K- written by and published by . This book was released on 2006 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present measurements of the branching fractions for the charmless two-body decays B° →??− and B° → K+?−, and a search for the decay B° → K+K−. They include the effects of final-state radiation from the daughter mesons for the first time, and quote branching fractions for the inclusive processes B° → h+h'−n?, where h and h' are pion or kaons. The maximum value of the sum of the energies of the n undetected photons, E{sub {gamma}}{sup max}, is mode-dependent. Using a data sample of approximately 227 million?(4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e− collider at SLAC.
Book Synopsis Measurement of Branching Fractions of B0 Decays to K1(1270)+ Pi- and K1(1400)+ Pi- by :
Download or read book Measurement of Branching Fractions of B0 Decays to K1(1270)+ Pi- and K1(1400)+ Pi- written by and published by . This book was released on 2008 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the branching fraction of neutral B meson decaying to final states containing a K1 meson, i.e. K1(1270) and K1(1400), and a charged pion. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 454 million B{bar B} pairs produced in ee− annihilation. We measure the branching fraction?(B° → K1+?−) = (31.0 ± 2.7 ± 6.9) x 10−6, where the first error quoted is statistical and the second is systematic. In the framework of the K-matrix formalism used to describe these decays, we also set limits on the ratio of the production constants for the K1(1270)+ and K1(1400)+ mesons in B° decays.
Book Synopsis Analysis of D0 -] K+ Pi- Pi0 Decays by : Michael Galante Wilson
Download or read book Analysis of D0 -] K+ Pi- Pi0 Decays written by Michael Galante Wilson and published by . This book was released on 2005 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analyzing D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} decays, herein are presented the methods and results of a search for D{sup 0}-{bar D}{sup 0} mixing, a measurement of the branching ratio R {equivalent_to} {Lambda}(D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0})/{Lambda}(D{sup 0} {yields} K{sup -}{pi}{sup +}{pi}{sup 0}), and measurements of the contributions from D{sup 0} {yields} K{sup +}{rho}{sup -}, K*{sup +}{pi}{sup -}, K*{sup 0}{pi}{sup 0}; 230.4 fb{sup -1} of data collected from the BABAR detector at the PEP-II collider during 2000-2004 (Runs 1-4) are analyzed. An event-level tagging technique is developed, which facilitates the accurate determination of doubly Cabibbo-suppressed resonance contributions by suppressing background from Cabibbo-favored decays. The branching ratio is measured as R = (0.214 {+-} 0.008 (stat) {+-} 0.008 (syst))%, with (46.1 {+-} 3.3 (stat) {+-} 2.9 (syst))% of D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} decays proceeding through the channel D{sup 0} {yields} K*{sup +}{pi}{sup -}. The data are consistent with the null-D-mixing hypothesis at a confidence level of 10%, and the expected value of {+-} {radical}(x{sup 2} + y{sup 2}) is measured as -0.013 {+-} 0.010 (stat), indicating negative interference between mixing and doubly Cabibbo-suppressed decay. The expected value of the integrated mixing rate is (x{sup 2} + y{sup 2})/2 = (0.013 {+-} 0.013 (stat))%.
Book Synopsis Improved Measurements of Branching Fractions for B0 -] Pi+pi-, K+pi-, and Search for B0 -] K+K- by : J. C. Chen
Download or read book Improved Measurements of Branching Fractions for B0 -] Pi+pi-, K+pi-, and Search for B0 -] K+K- written by J. C. Chen and published by . This book was released on 2005 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present preliminary measurements of branching fractions for the charmless two-body decays B{sup 0} {yields} {pi}{sup +}{pi}{sup -} and K{sup +}{pi}{sup -}, and a search for B{sup 0} {yields} K{sup +}K{sup -} using a data sample of approximately 227 million B{bar B} decays. Signal yields are extracted with a multi-dimensional maximum likelihood fit, and the efficiency is corrected for the effects of final-state radiation. We find the charge-averaged branching fractions (in units of 10{sup -6}): {Beta}(B{sup 0} {yields} {pi}{sup +}{pi}{sup -}) = 5.5 {+-} 0.4 {+-} 0.3; {Beta}(B{sup 0} {yields} K{sup +}{pi}{sup -}) = 19.2 {+-} 0.6 {+-} 0.6; and {Beta}(B{sup 0} {yields} K{sup +}K{sup -}) =
Book Synopsis Measurement of the absolute branching fractions for D0 decays into K-[pi]+, K-[pi]+[pi]+[pi]-, K0[pi]+[pi]- by : ARGUS Collaboration
Download or read book Measurement of the absolute branching fractions for D0 decays into K-[pi]+, K-[pi]+[pi]+[pi]-, K0[pi]+[pi]- written by ARGUS Collaboration and published by . This book was released on 1998 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MEASUREMENTS OF BRANCHING FRACTIONS AND CP VIOLATING ASYMMETRIES IN B0 ---] PI+ PI-, K+ PI-, K+ K- DECAYS. by :
Download or read book MEASUREMENTS OF BRANCHING FRACTIONS AND CP VIOLATING ASYMMETRIES IN B0 ---] PI+ PI-, K+ PI-, K+ K- DECAYS. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of branching fractions and CP-violating asymmetries for neutral B meson decays to two-body final states of charged pions and kaons. The results are obtained from a data sample of about 88 million[Upsilon](4S)[yields] B[bar B] decays collected between 1999 and 2002 with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. From a time-independent fit we measure the charge-averaged branching fractions[Beta](B[sup 0][yields][pi][sup+][pi][sup -])= (4.7[+-] 0.6[+-] 0.2) x 10[sup -6] and[Beta](B[sup 0][yields] K[sup+][pi][sup -])= (17.9[+-] 0.9[+-] 0.7) x 10[sup -6], where the first uncertainty is statistical and the second is systematic; the 90% confidence level upper limit[Beta](B[sup 0][yields] K[sup+]K[sup -])
Book Synopsis Measurement of Branching Ratios and CP Asymmetries for the Decays B0 → Π+π- [pi + Pi -], B0 → K+π- [K + Pi -], B0 → K+K- by : Kolja Andreas Prothmann
Download or read book Measurement of Branching Ratios and CP Asymmetries for the Decays B0 → Π+π- [pi + Pi -], B0 → K+π- [K + Pi -], B0 → K+K- written by Kolja Andreas Prothmann and published by . This book was released on 2012 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Branching Fraction and Dalitz Distribution for B0 to D(*)+/- K0 Pi-/+ Decays by :
Download or read book Measurement of Branching Fraction and Dalitz Distribution for B0 to D(*)+/- K0 Pi-/+ Decays written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present measurements of the branching fractions for the three-body decays B° → D{sup (*){-+}} K°[pi]{sup {+-}} and their resonant submodes B° → D{sup (*){-+}} K*{sup {+-}} using a sample of approximately 88 million B{bar B} pairs collected by the BABAR detector at the PEP-II asymmetric energy storage ring.
Book Synopsis Measurement of Branching Ratios and CP Asymmetries for the Decays B0->pi+pi- B0->K+pi- B0->K+K- by : Kolja Andreas Prothmann
Download or read book Measurement of Branching Ratios and CP Asymmetries for the Decays B0->pi+pi- B0->K+pi- B0->K+K- written by Kolja Andreas Prothmann and published by . This book was released on 2013 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the absolute branching fractions for D° decays into K ̄π+, K ̄π+π+π ̄, K°π+π ̄ [K-pi, K-pi-pi-pi, K-pi-pi] by :
Download or read book Measurement of the absolute branching fractions for D° decays into K ̄π+, K ̄π+π+π ̄, K°π+π ̄ [K-pi, K-pi-pi-pi, K-pi-pi] written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Branching Fraction for B- --] D0 K*- by :
Download or read book Measurement of the Branching Fraction for B- --] D0 K*- written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of the branching fraction for the decay B[sup -] [yields] D[sup 0]K*[sup -] using a sample of approximately 86 million B[bar B] pairs collected by the BABAR detector from e[sup +]e[sup -] collisions near the [Upsilon](4S) resonance. The D[sup 0] is detected through its decays to K[sup -] [pi][sup +], K[sup -][pi][sup +][pi][sup 0] and K[sup -] [pi][sup +][pi][sup -][pi][sup +], and the K*[sup -] through its decay to K[sub S][sup 0] [pi][sup -]. They measure the branching fraction to be [Beta](B[sup -] [yields] D[sup 0]K*[sup -]) = (6.3 [+-] 0.7(stat.) [+-] 0.5(syst.)) x 10[sup -4].
Book Synopsis Measurement of CP Asymmetries and Branching Fractions in B0 -] Pi+ Pi-, B0 -] K+ Pi-, B0 -] Pi0 Pi0, B0 -] K0 Pi0 and Isospin Analysis of B -] Pi Pi Decays by :
Download or read book Measurement of CP Asymmetries and Branching Fractions in B0 -] Pi+ Pi-, B0 -] K+ Pi-, B0 -] Pi0 Pi0, B0 -] K0 Pi0 and Isospin Analysis of B -] Pi Pi Decays written by and published by . This book was released on 2008 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present preliminary results of improved measurements of the CP-violating asymmetries and branching fractions in the decays B° →??−, B° → K+?−, B° →?°?°, and B° → K°?°. This update includes all data taken at the?(4S) resonance by the BABAR experiment at the asymmetric PEP-II B-meson factory at SLAC, corresponding to 467 ± 5 million B{bar B} pairs. They find S{sub??} = -0.68 ± 0.10 ± 0.03, C{sub??} = -0.25 ± 0.08 ± 0.02,?{sub K{sub?}} = -0.107 ± 0.016{sub -0.004}, {sup +0.006}, C{sub?°?°} = -0.43 ± 0.26 ± 0.05,?(B° →?°?°) = (1.83 ± 0.21 ± 0.13) x 10−6,?(B° → K°?°) = (10.1 ± 0.6 ± 0.4) x 10−6, where the first error is statistical and the second is systematic. They observe CP violation with a significance of 6.7? in B° → {pi}− and 6.1? in B° → K+{pi}−. Constraints on the Unitarity Triangle angle? are determined from the isospin relation between all B → {pi}{pi} rates and asymmetries.
Book Synopsis Measurement of Neutral B Decay Branching Fractions to K[sub S][sup 0][pi][sup +][pi][sup -] Final States by :
Download or read book Measurement of Neutral B Decay Branching Fractions to K[sub S][sup 0][pi][sup +][pi][sup -] Final States written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The branching fractions for B[sup 0] --> K[sup 0][pi][sup +][pi][sup -], B[sup 0] --> K*[sup +][pi][sup -] and B[sup 0] --> D[sup -]( --> K[sub s][sup 0][pi][sup -])[pi][sup +] decaying to a K[sub s][sup 0][pi][sup +][pi][sup -] state have been measured and agree with previous measurements. The direct CP violating parameter A[sub K*[pi]] was measured for the decay B[sup 0] --> K*[sup +][pi][sup -] and is in agreement with the CLEO measurement, with no evidence of CP violation with the statistics used. Using larger datasets, one can extract amplitudes and relative phases of the resonant contributions to the Dalitz plot, with the possibility to observe new B-meson decays.
Book Synopsis Measurement of the Ratio of Branching Fractions B(D0 ---] K+ Pi- ) by :
Download or read book Measurement of the Ratio of Branching Fractions B(D0 ---] K+ Pi- ) written by and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of R{sub B}, the ratio of the branching fraction for the rare decay D° → K?− to that for the Cabibbo-favored decay D° → K−?+. Charge conjugate decays are implicitly included. A signal of 2005 ± 104 events for the decay D° → K+?− is obtained using the CDF II detector at the Fermilab Tevatron collider. The data set corresponds to an integrated luminosity of 0.35 fb−1 produced in {bar p}p collisions at √s = 1.96 TeV. Assuming no mixing, they find R{sub B} = [4.05 ± 0.21(stat) ± 0.11(syst)] x 10−3. This measurement is consistent with the world average, and comparable in accuracy with the best measurements from other experiments.
Book Synopsis Measurement of Branching Fractions of B Decays to K1(1270)pi and K1(1400)pi and Determination of the CKM Angle Alpha from B0 --] A1(1260) - Pi- by :
Download or read book Measurement of Branching Fractions of B Decays to K1(1270)pi and K1(1400)pi and Determination of the CKM Angle Alpha from B0 --] A1(1260) - Pi- written by and published by . This book was released on 2011 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Standard Model, CP violation in weak interactions involving quarks is parameterized by an irreducible complex phase in the Cabibbo-Kobayashi-Maskawa (CKM) quark-mixing-matrix. The precise determination of the CKM elements is a necessary ingredient for a stringent test of the Standard Model predictions, and is a crucial input for reducing the theoretical error in many New Physics searches with flavor, e.g., in the kaon sector. The unitarity of the CKM matrix is typically expressed as a triangle relationship among its parameters, where the area of the so-called Unitarity Triangle visually depicts the amount of asymmetry between the decays of B particles and their antimatter counterparts. In the past few years, the BABAR and Belle experiments have been able to measure all three angles of the triangle from CP asymmetry measurements. The first asymmetry measurements in B particle decays, about ten years ago, allowed to determine [beta], which is now known to better than 5% precision. The angles [alpha] and [gamma], measured in much rarer processes, required several years of data taking before analyses could yield reliable answers. A remarkable feature is that the direct measurement of the angles of the Unitarity Triangle generates an area that is consistent with the area predicted by measurement of the sides. In this thesis we have presented the branching fraction measurements of charged and neutral B meson decays to K1(1270)[pi] and K1(1400)[pi], obtained from a data sample of 454 million [Upsilon](4S) → B{bar B} events. This analysis is particularly challenging from the experimental side since the branching fractions involved are very low, at the level of 10−6 - 10−7, and the signal is characterized by the simultaneous presence of two overlapping resonances, which exhibit sizeable interference effects. The combined K1(1270)[pi] and K1(1400)[pi] signal is therefore modeled with a K-matrix formalism, which accounts for the effects of interference between the K1(1270) and K1(1400) mesons by introducing two effective parameters. The model is derived from the analysis, performed by the ACCMOR Collaboration, of the diffractive production of strange mesons.
Book Synopsis Improved Measurements of Neutral B Decay Branching Fractions to K0s Pi+ Pi- and the Charge Asymmetry of B0 -] K*+ Pi- by : J. C. Chen
Download or read book Improved Measurements of Neutral B Decay Branching Fractions to K0s Pi+ Pi- and the Charge Asymmetry of B0 -] K*+ Pi- written by J. C. Chen and published by . This book was released on 2005 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors analyze the decay B{sup 0} {yields} K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} using a sample of 232 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. A maximum likelihood fit finds the following branching fractions: {Beta}(B{sup 0} {yields} K{sup 0}{pi}{sup +}{pi}{sup -}) = (43.0 {+-} 2.3 {+-} 2.3) x 10{sup -6}, {Beta}(B{sup 0} {yields} f{sub 0}({yields} {pi}{sup +}{pi}{sup -})K{sup 0}) = (5.5 {+-} 0.7 {+-} 0.5 {+-} 0.3) x 10{sup -6} and {Beta}(B{sup 0} {yields} K*{sup +}{pi}{sup -}) = (11.0 {+-} 1.5 {+-} 0.5 {+-} 0.5) x 10{sup -6}. For these results, the first uncertainty is statistical, the second is systematic, and the third (if present) is due to the effect of interference from other resonances. They also measure the CP-violating charge asymmetry in the decay B{sup 0} {yields} K*{sup +}{pi}{sup -}, {Alpha}{sub K*{pi}} = -0.11 {+-} 0.14 {+-} 0.05.
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