scholarly journals Interpretation of theX(3872)as a charmonium state plus an extra component due to the coupling to the meson-meson continuum

2013 ◽  
Vol 88 (1) ◽  
Author(s):  
J. Ferretti ◽  
G. Galatà ◽  
E. Santopinto
Keyword(s):  
Charmonium State

scholarly journals Comment on the X(3915) nonstandard hadron candidate

2019 ◽  
Vol 212 ◽  
pp. 02009 ◽  
Author(s):  
Stephen Lars Olsen
Keyword(s):  
Experimental Evidence ◽  
Decay Width ◽  
Partial Decay Width ◽  
Charmonium State ◽  
Radial Excitation ◽  
Order Of Magnitude

I review the experimental evidence for the X(3915), the candidate nonstandard meson associated with ωJ/ψ resonance-like peaks in B → KωJ/ψ and γγ → ωJ/ψ near M(ωJ/ψ) = 3920 MeV, and address the conjecture that it can be identified as the χ′c2, the radial excitation of the χc2 charmonium state. Since the partial decay width for B → KX(3915) is at least an order-of-magnitude higher than that for B → Kχc2, its assignment as the χ’c2 is dubious.

scholarly journals Decays of the X(3872) and theχc1(2P)charmonium state

2007 ◽  
Vol 75 (11) ◽  
Author(s):  
Ce Meng ◽  
Kuang-Ta Chao
Keyword(s):  
Charmonium State

New Results on Double Charmonium Production in e+e- Annihilation at $\sqrt{s} \approx 10.6~{\rm GeV}$ with the Belle Detector

2005 ◽  
Vol 20 (16) ◽  
pp. 3617-3620
Author(s):  
◽  
T. Ziegler
Keyword(s):  
Cross Section ◽  
Strong Evidence ◽  
Previous Analysis ◽  
Charmonium State ◽  
Data Set ◽  
Charmonium Production ◽  
Belle Detector ◽  
Theoretical Predictions ◽  
Order Of Magnitude ◽  
The Cross

Extending a previous analysis1 the double charmonium production [Formula: see text] and [Formula: see text] has been investigated with a data set of 155 fb-1 with the Belle detector. Theoretical predictions for the cross section are one order of magnitude lower than the measured value and this discrepancy is still not understood. In a very recent update with a dataset of 285 fb-1 strong evidence for a new charmonium state at a mass of 3.940 GeV was found.

scholarly journals Recent heavy-flavour results from ATLAS

2018 ◽  
Vol 171 ◽  
pp. 01006
Author(s):  
Jing Chen
Keyword(s):  
Elliptic Flow ◽  
Dense Matter ◽  
Heavy Ion ◽  
Charmonium State ◽  
Medium Effects ◽  
Strong Suppression ◽  
Centrality Dependence ◽  
Flow Signal ◽  
Central Collisions ◽  
Large Systems

The ATLAS heavy-ion program utilizes heavy-flavour hadrons to probe the hot, dense matter formed at the LHC. Quarkonium measurements have been performed in pp, p+Pb and Pb+Pb systems to study medium effects. The Pb+Pb results show a strong suppression of charmonium productions in more central events. Proton-lead interactions show little modification of the 1S charmonium state, but seem to indicate a centrality dependence of the 2S state. Upsilons have been studied in p+Pb and are found to show decreasing behaviour in more central collisions. Inclusive muons with pT above 4 GeV have been studied to provide insight on open-flavour production, and are found to be strongly suppressed in Pb+Pb collisions with a substantial and significant elliptic flow signal. Muon-hadron correlations have also been studied in the 2016 [see formula in PDF] = 8.16 TeV p+Pb data. There are clear indications of a near-side ridge, suggesting that similar mechanisms may be relevant for both the small and large systems.

scholarly journals Color screening and the suppression of the charmonium state yield in nuclear reactions

2004 ◽  
Vol 69 (1) ◽  
Author(s):  
L. Gerland ◽  
L. Frankfurt ◽  
M. Strikman ◽  
H. Stöcker
Keyword(s):  
Nuclear Reactions ◽  
Charmonium State

scholarly journals SEARCH FOR A CHARMONIUM ASSIGNMENT FOR THE X(3872)

2005 ◽  
Vol 20 (02n03) ◽  
pp. 240-249 ◽  
Author(s):  
◽  
STEPHEN L. OLSEN
Keyword(s):  
Decay Process ◽  
Charmonium State ◽  
Belle Detector

We report recent results on the properties of the X(3872) produced via the B+→K+ X(3872) decay process in the Belle detector. We compare these properties with expectations for possible charmonium-state assignments.

scholarly journals ψ(2S) Production in p-Pb and Pb-Pb Collisions with the ALICE Experiment

Proceedings ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 17
Author(s):  
Luca Micheletti
Keyword(s):  
Transverse Momentum ◽  
Nuclear Matter ◽  
Decay Channel ◽  
Center Of Mass ◽  
Charmonium State ◽  
Inclusive Production ◽  
Alice Experiment ◽  
Cold Nuclear Matter ◽  
Matter Effects ◽  
Theoretical Predictions

The inclusive production of the charmonium state ψ ( 2 S ) was studied in p-Pb and Pb-Pb collisions at s NN = 8.16 TeV and 5.02 TeV respectively, using the ALICE detector at the CERN LHC. The ψ ( 2 S ) is less bound than the J / ψ and it represents an interesting probe for the study of cold nuclear matter effects in p-Pb collisions, while in the Pb-Pb system its formation can be strongly influenced by QGP production. The measurements are performed in different center-of-mass rapidity ranges, 2.03 < y cms < 3.53 and −4.46 < y cms < −2.96 for p-Pb collisions and 2.5 < y cms < 4.0 for Pb-Pb collisions, down to zero transverse momentum, through the ψ ( 2 S ) → μ + μ - decay channel. The results are compared to those obtained for the J / ψ and with theoretical predictions.

scholarly journals Charmonium state formation and decay:pp¯→1D2→1P1γ

1995 ◽  
Vol 51 (5) ◽  
pp. 2478-2481
Author(s):  
M. Anselmino ◽  
F. Caruso ◽  
F. Murgia ◽  
M. R. Negrão
Keyword(s):  
State Formation ◽  
Charmonium State

scholarly journals Semileptonic Decays of B c Meson to a P -Wave Charmonium State χ c or h c

2001 ◽  
Vol 35 (4) ◽  
pp. 395-398 ◽  
Author(s):  
Chang Chao-Hsi ◽  
Chen Yu-Qi ◽  
Wang Guo-Li ◽  
Zong Hong-Shi
Keyword(s):  
Semileptonic Decays ◽  
P Wave ◽  
Charmonium State
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