Observation Of The Y 4140 Structure In The J Psi Phi Mass Spectrum In B Pm To J Psi Phi K Decays

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Observation Of A Narrow Near Threshold Structure In The J Psi Phi Mass Spectrum In B To J Psi Phi K Decays

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Author :
language : en
Publisher:
Release Date : 2010

Observation Of A Narrow Near Threshold Structure In The J Psi Phi Mass Spectrum In B To J Psi Phi K Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

Observation is reported for a structure near the J/[psi][phi] threshold in B+ → J/[psi][phi]K+ decays produced in {bar p}p collisions at √s = 1.96 TeV with a statistical significance of beyond 5 standard deviations. There are 19 ± 6 events observed for this structure at a mass of 4143.4{sub -3.0}{sup +2.9}(stat) ± 0.6(syst) MeV/c2 and a width of 15.3{sub -6.1}{sup +10.4}(stat) ± 2.5(syst) MeV/c2, which are consistent with the previous measurements reported as evidence of the Y(4140).

Evidence For A Narrow Near Threshold Structure In The J Psi Phi Mass Spectrum In B To J Psi Phi K Decays

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Author :
language : en
Publisher:
Release Date : 2009

Evidence For A Narrow Near Threshold Structure In The J Psi Phi Mass Spectrum In B To J Psi Phi K Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

Evidence is reported for a narrow structure near the J/[psi][phi] threshold in exclusive B+ → J/[psi][phi]K+ decays produced in {bar p}p collisions at √s = 1.96 TeV. A signal of 14 ± 5 events, with statistical significance in excess of 3.8 standard deviations, is observed in a data sample corresponding to an integrated luminosity of 2.7 fb−1, collected by the CDF II detector. The mass and natural width of the structure are measured to be 4143.0 ± 2.9(stat) ± 1.2(syst) MeV/c2 and 11.7{sub -5.0}{sup +8.3}(stat) ± 3.7(syst) MeV/c2.

Observation Of The Three Body Rare Decay B J Psi Phi K

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Author :
language : en
Publisher:
Release Date : 2010

Observation Of The Three Body Rare Decay B J Psi Phi 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 2010 with categories.

The authors report the study of the B meson decays B{sup ±} 2!J/[psi][phi]K{sup ±}, B° 2!J/[psi][phi]K° using 433 million of B{bar B} events collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II ee− asymmetric-energy collider. They obtain the branching fraction measurements: [Beta](B{sup ±} 2!J[psi][phi]K{sup ±}) = (5.6 {+-} 0.9(stat) {+-} 0.3(sys)) x 10−5, [Beta](B{sup {+-}} 2!J[psi][phi]K°) = (5.4 {+-} 1.2(stat) {+-} 0.4(sys)) x 10−5.

Observation Of The Decay B Jpsi Eta K And Search For The X 3872 Jpsi Eta

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Author :
language : en
Publisher:
Release Date : 2004

Observation Of The Decay B Jpsi Eta K And Search For The X 3872 Jpsi Eta 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 report the observation of the B meson decay B[sup [+-]] [yields] J/[psi][eta]K[sup [+-]] and evidence for the decay B[sup 0] [yields] J/[psi][eta]K[sub S][sup 0], using 90 million B[bar B] events collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II e[sup +]e[sup -] asymmetric-energy storage ring. They obtain branching fractions of [Beta](B[sup [+-]] [yields] J/[psi][eta]K[sup [+-]]) = (10.8 [+-] 2.3(stat.) [+-] 2.4(syst.)) x 10[sup -5] and [Beta](B[sup 0] [yields] J/[psi][eta]K[sub S][sup 0]) = (8.4 [+-] 2.6(stat.) [+-] 2.7(syst.)) x 10[sup -5]. They search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B[sup [+-]] [yields] X(3872)K[sup [+-]], X(3872) [yields] J/[psi][eta] and determine an upper limit of [Beta](B[sup [+-]] [yields] X(3872)K[sup [+-]]) [yields] (J/[psi][eta]K[sup [+-]])

Observation Of The Decay Mathrm B To Psi 2 Mathrm S Phi 1020 Mathrm K In Pp Collisions At Sqrt S

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language : en
Publisher:
Release Date : 2016

Observation Of The Decay Mathrm B To Psi 2 Mathrm S Phi 1020 Mathrm K In Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

The decay $ \mathrm{B}^{+} \to \psi(2 \mathrm{S}) \phi(1020) \mathrm{ K }^{+} $ is observed for the first time using data collected from pp collisions at $\sqrt{s} = $ 8 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.6 fb$^{-1}$. The branching fraction of this decay is measured, using the mode $\mathrm{B}^{+}\to \psi(2 \mathrm{S}) \mathrm{ K }^{+}$ as normalization, to be (4.0 $\pm$ 0.4 (stat) $\pm$ 0.6 (syst) $\pm$ 0.2 ($\mathcal{B})$)$\times$ 10$^{-6}$, where the third uncertainty is from the imprecision in the normalization channel.

Observation Of The Decay B C J Psi Pi And Measurement Of The B C Mass

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language : en
Publisher:
Release Date : 2007

Observation Of The Decay B C J Psi Pi And Measurement Of The B C Mass 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 B{sub c}{sup ±} meson is observed through the decay B{sub c}{sup ±} → J/[psi] [pi]{sup ±}, in data corresponding to an integrated luminosity of 2.4 fb−1 recorded by the CDF II detector at the Fermilab Tevatron. A signal of 108 {+-} 15 candidates is observed, with a significance that exceeds 8[sigma]. The mass of the B{sub c}{sup {+-}} meson is measured to be 6275.6 {+-} 2.9(stat.) {+-} 2.5(syst.) MeV/c2.

Measurement Of Br Bu To Phi K Br Bu To J Psi K At The Collider Detector At Fermilab

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Author : Robert A. Napora
language : en
Publisher:
Release Date : 2004

Measurement Of Br Bu To Phi K Br Bu To J Psi K At The Collider Detector At Fermilab written by Robert A. Napora 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.

This thesis presents evidence for the decay mode B{sup {+-}} {yields} {phi}K{sup {+-}} in p{bar p} collisions at {radical}s = 1.96 TeV using (120 {+-} 7)pb{sup -1} of data collected by the Collider Detector at Fermilab (CDF). This signal is then used to measure the branching ratio relative to the decay mode B{sup {+-}} {yields} J/{psi}K{sup {+-}}. The measurement starts from reconstructing the two decay modes: B{sup {+-}} {yields} {phi}K{sup {+-}}, where {phi} {yields} K{sup +}K{sup -} and B{sup {+-}} {yields} J/{psi}K{sup {+-}}, where J/{psi} {yields} {mu}{sup +}{mu}{sup -}. The measurement yielded 23 {+-} 7 B{sup {+-}} {yields} {phi}K{sup {+-}} events, and 406 {+-} 26 B{sup {+-}} {yields} J/{psi}K{sup {+-}} events. The fraction of B{sup {+-}} {yields} J/{psi}K{sup {+-}} events where the J/{psi} subsequently decayed to two muons (as opposed to two electrons) was found to be f{sub {mu}{mu}} = 0.839 {+-} 0.066. The relative branching ratio of the two decays is then calculated based on the equation: BR(B{sup {+-}} {yields} {phi}K{sup {+-}})/BR(B{sup {+-}} {yields} J/{psi}K{sup {+-}}) = N{sub {phi}K}/N{sub {psi}K} {center_dot}f{sub {mu}{mu}} BR(J/{psi} {yields} {mu}{sup +}{mu}{sup -})/BR({phi} {yields} K{sup +}K{sup -}) {epsilon}{sub {mu}{mu}}K/{epsilon}KKK R({epsilon}{sub iso}). The measurement finds BR(B{sup {+-}} {yields} {phi}K{sup {+-}})/BR(B{sup {+-}} {yields} J/{psi}K{sup {+-}}) = 0.0068 {+-} 0.0021(stat.) {+-} 0.0007(syst.). The B{sup {+-}} {yields} {phi}K{sup {+-}} branching ratio is then found to be BR(B{sup {+-}} {yields} {phi}K{sup {+-}}) = [6.9 {+-} 2.1(stat.) {+-} 0.8(syst.)] x 10{sup -6}. This value is consistent with similar measurements reported by the e{sup +}e{sup -} collider experiments BaBar[1], Belle[2], and CLEO[3].

La Vallese

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Author :
language : en
Publisher:
Release Date : 1869

La Vallese written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1869 with categories.

Observation Of B 0 S To J Psi P Overlinep Decays And Precision Measurements Of The B 0 S Masses

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Author : Roel Aaij
language : en
Publisher:
Release Date : 2019

Observation Of B 0 S To J Psi P Overlinep Decays And Precision Measurements Of The B 0 S Masses written by Roel Aaij and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.

Search For The X 4140 State In B U2192 J K Decays With The D0 Detector

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Author :
language : en
Publisher:
Release Date : 2014

Search For The X 4140 State In B U2192 J K Decays With The D0 Detector written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

We investigate the decay B+→J/??K+ in a search for the X(4140) state, a narrow threshold resonance in the J/?? system. The data sample corresponds to an integrated luminosity of 10.4 fb-1 of p$ar{p}$ collisions at √s =1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider. We observe a mass peak with a statistical significance of 3.1 standard deviations and measure its invariant mass to be M=4159.0 ± 4.3 (stat) ± 6.6 (syst) MeV and its width to be ?= 19.9±12.6 (stat)$+1.0top{-8.0}$ (syst) MeV.