Observation Of The Narrow State X 3872 J Psi Pi Pi In Pbar P Collisions At S

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Observation Of The Narrow State X 3872 J Psi Pi Pi In Pbar P Collisions At S

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Author :
language : en
Publisher:
Release Date : 2004

Observation Of The Narrow State X 3872 J Psi Pi Pi In Pbar P Collisions At 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 2004 with categories.

The authors report the observation of a narrow state decaying into J/???− and produced in 220 pb−1 of {bar p}p collisions at √s = 1.96 TeV in the CDF II experiment. They observe 730 ± 90 decays. The mass is measured to be 3871.3 ± 0.7(stat) ± 0.4(syst) MeV/c2, with an observed width consistent with the detector resolution. This is in agreement with the recent observation by the Belle Collaboration of the X(3872) meson.

Prins Almenjors Och Prinsessan Saras M Rkv Rdiga K Rlekshandel Fri Fvers Ttning Fr N Franskan Bo Tryckt Hos Johan C Frenckell 1799

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language : en
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Release Date : 1799

Prins Almenjors Och Prinsessan Saras M Rkv Rdiga K Rlekshandel Fri Fvers Ttning Fr N Franskan Bo Tryckt Hos Johan C Frenckell 1799 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1799 with categories.

Observation Of The Narrow State X 3872 J Psi Pi Pi In Pbar P Collisions At S 1 2

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Author :
language : en
Publisher:
Release Date : 2005

Observation Of The Narrow State X 3872 J Psi Pi Pi In Pbar P Collisions At S 1 2 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.

Search For New States Decaying Into J Psi Pi Pi With The Atlas Detector At The Large Hadron Collider

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Author : Wei-Cheng Wong
language : en
Publisher:
Release Date : 2012

Search For New States Decaying Into J Psi Pi Pi With The Atlas Detector At The Large Hadron Collider written by Wei-Cheng Wong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Collisions (Nuclear physics) categories.

Using pp collision data collected at sqrt(s ) = 7 TeV in 2010 and 2011with the ATLAS detector (A Toroidal LHC ApparatuS), corresponding to an integrated luminosity of 2.44 fb-1 , the J/PsiPi+Pi- combinations have been studied. The selection criteria have been developed, the detection efficiency of the Xc (3872) signal has been evaluated, and the systematic errors have been identified. Both the Psi(2S ) and the Xc (3872) signals are observed in the J/PsiPi+Pi- mass spectrum. The detection of the charmonium-like X, Y, Zstates is feasible with the ATLAS detector at the Large Hadron Collider (LHC). Other than the Psi(2 S ) and the Xc (3872) signals, there is no evidence for any significant enhancement in the J/PsiPi+Pi- mass spectrum. This dissertation research establishes that ATLAS can detect Xc (3872) like new particles in the J/PsiPi+Pi- final state, and with current data sample, no new states have been observed in this study.

Observation Of A New B S 0 Pi Pm State

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language : en
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Release Date : 2016

Observation Of A New B S 0 Pi Pm State 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.

We report the observation of a narrow structure, $X(5568)$, in the decay sequence $X(5568) \rightarrow B_s^0 \pi^{\pm}$, $B_s^0 \rightarrow J/\psi \phi$, $J/\psi\rightarrow \mu^+ \mu^-$, $\phi \rightarrow K^+K^-$. This is the first observation of a hadronic state with valence quarks of four different flavors. The mass and natural width of the new state are measured to be $m = 5567.8 \pm 2.9 {\rm \thinspace (stat)} ^{+0.9}_{-1.9} {\rm \thinspace (syst)}$ MeV/$c^2$ and $\Gamma = 21.9 \pm 6.4 {\rm \thinspace (stat)} ^{+5.0}_{-2.5} {\rm \thinspace (syst)} $ MeV/$c^2$, and the significance including look-elsewhere effect and systematic uncertainties is 5.1$\sigma$. The observation is based on$10.4~\rm{fb^{-1}}$ of $p \overline p $ collision data at $\sqrt{s}$ = 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider.

Measurement Of The Dipion Mass Spectrum In X 3872 J Psi Pi Pi Decays

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language : en
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Release Date : 2005

Measurement Of The Dipion Mass Spectrum In X 3872 J Psi Pi Pi 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 2005 with categories.

The authors measure the dipion mass spectrum in X(3872) → J/???− decays using 360 pb−1 of {bar p}p collisions at √s = 1.96 TeV collected with the CDF II detector. The spectrum is fit with predictions for odd C-parity (3S1, 1P1, and 3D{sub J}) charmonia decaying to J/??+?−, as well as event C-parity states in which the pions are from?° decay. The latter case also encompasses exotic interpretations, such as a D°{bar D}*° molecule. Only the 3S1 and J/?? hypotheses are compatible with the data. Since 3S1 is untenable on other grounds, decay via J/?? is favored, which implies C = +1 for the X(3872). Models for different J/?-? angular momenta L are considered. Flexibility in the models, especially the introduction of?-? interference, enable good descriptions of the data for both L = 0 and 1.

Study Of J Psi Pi Pi States Produced In B0 To J Psi Pi Pi K0 And B To J Psi Pi Pi K

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language : en
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Release Date : 2005

Study Of J Psi Pi Pi States Produced In B0 To J Psi Pi Pi K0 And B To J Psi Pi Pi 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 2005 with categories.

We present results of a search for the X(3872) in B° → X(3872)K{sub S}°, X(3872) → J/???−, improved measurements of B− → X(3872)K−, and a study of the J/??+?− mass region above the X(3872). We use 232 million B{bar B} pairs collected at the?(4S) resonance with the BABAR detector at the PEP-II e+e− asymmetric-energy storage rings. The results include the 90% confidence interval 1.34 x 10−6

Analysis Of The P P Bar Mass Spectrum In J Psi

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Author : A. W. Thomas
language : en
Publisher:
Release Date : 2005

Analysis Of The P P Bar Mass Spectrum In J Psi written by A. W. Thomas 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 near-threshold enhancement in the p p-bar invariant mass spectrum of the reaction J/Psi --> gamma p p-bar, observed in an experiment by the BES Collaboration, is analysed. It is shown, within the Watson-Migdal approach to final state interactions, that the mass dependence of the p p-bar spectrum close to the threshold can be reproduced by the S-wave p p-bar interaction of the Jülich N N-bar model in the isospin I=1 state. Difficulties in the consistent interpretation of the p invariant mass spectrum of the reaction J/Psi --> pi^0 p p-bar, where there are no obvious signs for a final state interaction, are discussed.

Search For A Charged Partner Of The X 3872 In The B Meson Decay B To X K X To J Psi Pi Pi0

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Author :
language : en
Publisher:
Release Date : 2005

Search For A Charged Partner Of The X 3872 In The B Meson Decay B To X K X To J Psi Pi Pi0 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.

Observation Of A Narrow Resonance In The D Sub S Sup Pi Sup 0 System At 2 32 Gev C Sup 2 With Babar

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language : en
Publisher:
Release Date : 2004

Observation Of A Narrow Resonance In The D Sub S Sup Pi Sup 0 System At 2 32 Gev C Sup 2 With 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.

A new state with invariant mass near 2.32 GeV=c[sup 2] has been observed by the BABAR Collaboration in the inclusive D[sub s][sup +] [pi][sup 0] mass distribution using 91 fb[sup -1] of e[sup +]e[sup -] annihilation data taken at the PEP-II asymmetric-energy storage ring at energies near 10.6 GeV. The new state is narrow, with an observed width that is consistent with the experimental resolution. This narrow width combined with the quantum numbers of the final state imply that the decay is isospin-violating. The state has natural spin-parity, and its low mass suggests a J[sup P] = 0[sup +] assignment.