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

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

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Author :
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.

Prospects Of Observing The Decay Bc J Psi Pi And The Alignment Performance In The Atlas Experiment

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Author : Weina Ji
language : en
Publisher:
Release Date : 2010

Prospects Of Observing The Decay Bc J Psi Pi And The Alignment Performance In The Atlas Experiment written by Weina Ji 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.

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 2 J Psi Pi Pi At The Cdf Ii Experiment

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 2 J Psi Pi Pi At The Cdf Ii 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 2005 with categories.

The author presents a measurement of the dipion mass spectrum in the decay X(3872) → J/[Psi][pi]+ [pi]- using a 360 pb-1 sample of p$\bar{p}$ collisions at √s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron Collider. As a benchmark, they also extract the dipion mass distribution for [Psi](2S) → J/[Psi][pi]+ [pi]- decay. The X(3872) dipion mass spectrum is compared to QCD multipole expansion predictions for various charmonium states, as well as to the hypothesis X(3872) → J/[Psi][rho]0. They find that the measured spectrum is compatible with 3S1 charmonium decaying to J/[Psi][pi]+ [pi]- and with the X(3872) → J/[Psi][rho]0 hypothesis. There is, however, no 3S1 charmonium state available for assignment to the X(3872). The multipole expansion calculations for 1P1 and 3DJ states are in clear disagreement with the X(3872) data. For the [Psi](2S) the data agrees well with previously published results and to multipole expansion calculations for 3S1 charmonium. Other, non-charmonium, models for the X(3872) are described too. They conclude that since the dipion mass spectrum for X(3872) is compatible with J/[Psi][rho]0 hypothesis, the X(3872) should be C-positive. This conclusion is supported by recent results from Belle Collaboration which observed X(3872) → J/[Psi][gamma] decay. They argue that if X(3872) is a charmonium, then it should be either 1D2± or 23P1++ state, decaying into J/[Psi][pi]+ [pi]- in violation of isospin conservation. A non-charmonium assignment, such as D$\bar{D}$* molecule, is also quite possible.

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 Right Arrow J Psi Pi Pi At The Cdfii Experiment

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Author : Alexander Yurevich Rakitin
language : en
Publisher:
Release Date : 2005

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 Right Arrow J Psi Pi Pi At The Cdfii Experiment written by Alexander Yurevich Rakitin 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 dipion mass spectrum in the decay X(3872) [right arrow] J/ [psi] [pi]+ [pi]− using a 360 pb-1 sample of pp collisions at av [square root]s = 1.96 TeV collected with the CDF II detector at the Fermnilab Tevatron Collider. As a benchmark, we also extract the dipion mass distribution for [psi] (2s) [right arrow] J/ [psi] [pi]+ [pi]− decay. The X(3872) dipion mass spectrum is compared to QCD multipole expansion predictions for various charmonium states, as well as to the hypothesis [right arrow] J/ [psi] po. We find that the measured spectrum is compatible with 3S1 charmonium decaying to J/ [psi] [pi]+ [pi]− - and with the X(3872) - J/po hypothesis. There is, however, no 3S1 charmonium state available for assignment to the X(3872). The multipole expansion calculations for 1P1 and 3DJ states are in clear disagreement with the X(3872) data. For the [psi] (2S) the data agrees well with previously published results and to multipole expansion calculations for 3S1 charmonium. Other, non-charmonium, models for the X(3872) are described too. We conclude that since the dipion mass spectrum for X(3872) is compatible with J/pO hypothesis, the X(3872) should be C-positive. This conclusion is supported by recent results from Belle Collaboration which observed X(3872) -+ J/7y decay. We argue that if X(3872) is a charmonium, then it should be either ... state, decaying into J/ [psi] [pi]+ [pi]− in violation of isospin conservation. A non-charmonium assignment, such as DD* molecule, is also quite possible.

Study Of The B J Psi K Pi Pi Decay And Measurement Of The B X 3872 K Branching Fraction

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Author :
language : en
Publisher:
Release Date : 2004

Study Of The B J Psi K Pi Pi Decay And Measurement Of The B X 3872 K Branching Fraction 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 study the decay B− → J/?K−??− using 117 million B{bar B} events collected at the?(4S) resonance with the BaBar detector at the PEP-II e+e− asymmetric-energy storage ring. They measure the branching fractions?(B− → J/?K−?+?−) = (116 ± 7(stat.) ± 9(syst.)) x 10−5 and?(B− → X(3872)K−) x?(X(3872) → J/??+?−) = (1.28 ± 0.41) x 10−5 and find the mass of the X(3872) to be 3873.4 ± 1.4MeV/c2. They search for the h{sub c} narrow state in the decay B− → h{sub c} K−, h{sub c} → J/??+?− and for the decay B− → J/?D°?−, with D° → K−?+. They set the 90% C.L. limits?(B− → h{sub c}K−) x?(h{sub c} → J/??+?−)

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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Author :
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.

Measurement Of The Branching Fraction For The Decay K0 L Pi Pi E E In The High M Subscript Pi Subscript Pi Invariant Mass Region

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Author : Joshua J. Moss
language : en
Publisher:
Release Date : 2007

Measurement Of The Branching Fraction For The Decay K0 L Pi Pi E E In The High M Subscript Pi Subscript Pi Invariant Mass Region written by Joshua J. Moss and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Branching fractions (Nuclear physics) categories.