Observation And Measurement Of B0 To Lambda Lambda Bar K0 And B0 To Lambda Lambda Bar K 0 Decays At Belle

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Observation And Measurement Of B0 To Lambda Lambda Bar K0 And B0 To Lambda Lambda Bar K 0 Decays At Belle

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Author : 張育瑋
language : en
Publisher:
Release Date : 2008

Observation And Measurement Of B0 To Lambda Lambda Bar K0 And B0 To Lambda Lambda Bar K 0 Decays At Belle written by 張育瑋 and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

Science Citation Index

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Author :
language : en
Publisher:
Release Date : 1995

Science Citation Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Science categories.

Vols. for 1964- have guides and journal lists.

High Energy Physics Index

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Author :
language : en
Publisher:
Release Date : 1987

High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Nuclear physics categories.

Inis Atomindeks

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Author :
language : en
Publisher:
Release Date : 1981

Inis Atomindeks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Nuclear energy categories.

Observation Of The Baryonic B Decay B0bar To Lambda C Anti Lambda K

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Author :
language : en
Publisher:
Release Date : 2011

Observation Of The Baryonic B Decay B0bar To Lambda C Anti Lambda 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 2011 with categories.

The authors report the observation of the baryonic B decay {bar B}° 2![Lambda]{sub c} {bar [Lambda]}K− with a significance larger than 7 standard deviations based on 471 x 106 B{bar B} pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. They measure the branching fraction for the decay {bar B}° 2![Lambda]{sub c}+ {bar [Lambda]}K− to be (3.8 ± 0.8{sub stat} ± 0.2{sub sys} ± 1.0 {sub {Lambda}{sub c}+}) x 10−5. The uncertainties are statistical, systematic, and due to the uncertainty in the {Lambda}{sub c}+ branching fraction. They find that the {Lambda}{sub c}+ K− invariant mass distribution shows an enhancement above 3.5 GeV/c2.

Measurement Of The B0 Lambda Bar P Pi Branching Fraction Andstudy Of The Decay Dynamics

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Author : M. Bondioli
language : en
Publisher:
Release Date : 2006

Measurement Of The B0 Lambda Bar P Pi Branching Fraction Andstudy Of The Decay Dynamics written by M. Bondioli 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.

We present a measurement of the B{sup 0} {center_dot} {bar {Lambda}}p{pi}{sup -} branching fraction performed using the BABAR detector at the PEP-II asymmetric energy e{sup +}e{sup -} collider. Based on a 232 million B{bar B} pairs data sample we measure: {center_dot} (B{sup 0} {center_dot} {bar {Lambda}}p{pi}{sup -}) = [3.30 {center_dot} 0.53(stat.) {center_dot} 0.31 (syst.)] {center_dot} 10{sup -6}. A measurement of the differential spectrum as a function of the di-baryon invariant mass m({Lambda}p) is also presented; this shows a near-threshold enhancement similar to that observed in other baryonic B decays.

Measurements Of Cal B Overline B 0 To Lambda C Overline P And Cal B B To Lambda C Overline P Pi And Studies Of Lambda C Pi Resonances

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Author :
language : en
Publisher:
Release Date : 2008

Measurements Of Cal B Overline B 0 To Lambda C Overline P And Cal B B To Lambda C Overline P Pi And Studies Of Lambda C Pi Resonances written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

The authors present an investigation of the decays {bar B}° →?{sub c}{bar p} and B− →?{sub c}+{bar p}?− based on 383 x 106?(4S) → B{bar B} decays recorded with the BABAR detector. They measure the branching fractions of these decays; their ratio is?(B− →?{sub c}+{bar p}?−)/?({bar B}° →?{sub c}+{bar p}) = 15.4 ± 1.8 ± 0.3. The B− →?{sub c}+{bar p}?− process exhibits an enhancement at the?{sub c}+{bar p} threshold and is a laboratory for searches for excited charm baryon states. They observe the resonant decays B− →?{sub c}(2455)°{bar p} and B−?{sub c}(2800)°{bar p} but see no evidence for B− →?{sub c}(2520)°{bar p}. This is the first observation of the decay B− →?{sub c}(2800)°{bar p}; however, the mass of the observed excited?{sub c}° state is (2846 ± 8 ± 10) MeV/c2, which is somewhat inconsistent with previous measurements. Finally, they examine the angular distribution of the B− →?{sub c}(2455)°{bar p} decays and measure the spin of the?{sub c}(2455)° baryon to be 1/2, as predicted by the quark model.

Observation Of The Decay B0 Rho Rho And Measurement Of The Branching Fraction And Polarization

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Author :
language : en
Publisher:
Release Date : 2004

Observation Of The Decay B0 Rho Rho And Measurement Of The Branching Fraction And Polarization 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.

We have observed the rare decay B[sup 0] [yields] [rho][sup +][rho][sup -] in a sample of 89 million B[bar B] pairs recorded with the BABAR detector. We measure the branching fraction [Beta](B[sup 0] [yields] [rho][sup +][rho][sup -]) = (27[sub -6-7][sup +7+5]) x 10[sup -6] and determine the longitudinal polarization fraction [Lambda][sub L]/[Lambda] = 0.99[sub -0.07][sup +0.01] [+-] 0.03. The results are preliminary.

Observation Of B K0bar K And B0 K0 K0bar

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Author : B. Aubert
language : en
Publisher:
Release Date : 2006

Observation Of B K0bar K And B0 K0 K0bar written by B. Aubert 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.

The authors report observations of the b {yields} d penguin-dominated decays B{sup +} {yields} {bar K}{sup 0}K{sup +} and B{sup 0} {yields} K{sup 0}{bar K}{sup 0} in approximately 350 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector. They measure the branching fractions {Beta}(B{sup +} {yields} {bar K}{sup 0}K{sup +}) = (1.61 {+-} 0.44 {+-} 0.09) x 10{sup -6} and {Beta}(B{sup 0} {yields} K{sup 0}{bar K}{sup 0}) = (1.08 {+-} 0.28 {+-} 0.11) x 10{sup -6}, and the CP-violating charge asymmetry {Alpha}{sub CP} ({bar K}{sup 0} K{sup +}) = 0.10 {+-} 0.26 {+-} 0.03. Using a vertexing technique previously employed in several analyses of all-neutral final states containing kaons, they report the first measurement of time-dependent CP-violating asymmetries in B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}, obtaining S = -1.28{sub -0.73 -0.16}{sup +0.80 +0.11} and C = -0.40 {+-} 0.41 {+-} 0.06. They also report improved measurements of the branching fraction {Beta}(B{sup +} {yields} K{sup 0} {pi}{sup +}) = (23.9 {+-} 1.1 {+-} 1.0) x 10{sup -6} and CP-violating charge asymmetry {Alpha}{sub CP} (K{sup 0} {pi}{sup +}) = -0.029 {+-} 0.039 {+-} 0.010.

Observation Of The Decay B0 Rho Rho And Measurement Of The Branching Fraction And Polarization

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Author : B. Aubert
language : en
Publisher:
Release Date : 2003

Observation Of The Decay B0 Rho Rho And Measurement Of The Branching Fraction And Polarization written by B. Aubert 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.

We have observed the rare decay B{sup 0} {yields} {rho}{sup +}{rho}{sup -} in a sample of 89 million B{bar B} pairs recorded with the BABAR detector. We measure the branching fraction {Beta}(B{sup 0} {yields} {rho}{sup +}{rho}{sup -}) = (27{sub -6-7}{sup +7+5}) x 10{sup -6} and determine the longitudinal polarization fraction {Lambda}{sub L}/{Lambda} = 0.99{sub -0.07}{sup +0.01} {+-} 0.03. The results are preliminary.