Observation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>η</mml:mi><mml:mi>c</mml:mi><mml:mo>′</mml:mo></mml:msubsup></mml:math>Production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi><mml:mi>γ</mml:mi></mml:math>Fusion at CLEO

Asner, D. M.; Dytman, S. A.; Mehrabyan, S.; Muêller, J.; Nam, S.; Savinov, V.; Huang, G. S.; Miller, D. H.; Pavlunin, V.; Sanghi, B.; Shibata, E. I.; Shipsey, I. P. J.; Adams, G. S.; Chasse, M.; Cummings, J. P.; Danko, I.; Napolitano, J.; Cronin-Hennessy, D.; Park, C. S.; Park, W.; Thayer, J. B.; Thorndike, E. H.; Coan, T. E.; Gao, Y. S.; Liu, F.; Stroynowski, R.; Artuso, M.; Boulahouache, C.; Blusk, S.; Butt, J.; Dambasuren, E.; Dorjkhaidav, O.; Haynes, J.; Menaa, N.; Mountain, R.; Muramatsu, H.; Nandakumar, R.; Redjimi, R.; Sia, R.; Skwarnicki, T.; Stone, S.; Wang, J. C.; Zhang, Kevin; Mahmood, A. H.; Csorna, S. E.; Bonvicini, G.; Cinabro, D.; Dubrovin, M.; Bornheim, A.; Lipeles, E.; Pappas, S. P.; Shapiro, A.; Weinstein, A. J.; Mahapatra, R.; Nelson, H. N.; Briere, R. A.; Chen, G. P.; Ferguson, T.; Tatishvili, G.; Vogel, H.; Watkins, M. E.; Adam, N.; Alexander, J.; Berkelman, K.; Boisvert, V.; Cassel, D. G.; Duboscq, J. E.; Ecklund, K. M.; Ehrlich, R.; Galik, R. S.; Gibbons, L.; Gittelman, B.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hsu, L.; Jones, C. D.; Kandaswamy, J.; Kreinick, D. L.; Кузнецов, В. Е.; Magerkurth, A.; Mahlke-Krüger, H.; Meyer, T. O.; Patterson, J. R.; Pedlar, T. K.; Peterson, D.; Pivarski, J.; Riley, D.; Sadoff, A. J.; Schwarthoff, H.; Shepherd, M. R.; Sun, W.; Thayer, J. G.; Urner, D.; Wilksen, T.; Weinberger, M.; Athar, S. B.; Avery, P.; Breva-Newell, L.; Potlia, V.; Stoeck, H.; Yelton, J.; Eisenstein, B. I.; Gollin, G. D.; Karliner, I.; Lowrey, N.; Naik, P.; Sedlack, C.; Selen, M.; Thaler, J. J.; Williams, James S.; Edwards, K. W.; Besson, D.; Gao, K. Y.; Gong, D. T.; Kubota, Y.; Li, S. Z.; Poling, R.; Scott, A. W.; Smith, A.; Stepaniak, C. J.; Urheim, J.; Metreveli, Z.; Seth, K. K.; Tomaradze, A.; Zweber, P.; Arms, K.; Eckhart, E.; Gan, K. K.; Gwon, C.; Severini, H.; Skubic, P.

doi:10.1103/physrevlett.92.142001

Cited by 102 publications

(45 citation statements)

References 23 publications

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“…[14], were performed with two-photon pro- The properties of the η c (2S) state are less well studied. Measurements at the CLEO [55], BaBar [56,57], Belle [51,58] and BES III [59,60] experiments, using γ γ → η c (2S) → hadrons, double charmonium production in e + e − annihilation, exclusive B decays and radiative transitions of ψ(2S), yield the world averages [14] of 3639.4 ± 1.3 MeV for the η c (2S) mass, and 11.3 +3.2 −2.9 MeV for its natural width. Table 5 presents measurements of the masses of the η c and χ c states and of the natural width of the η c (1S) from the fit of the φφ invariant mass spectrum in Fig.…”

Section: Masses and Natural Widths Of Charmonium Statesmentioning

confidence: 99%

Study of charmonium production in $${b} $$ b -hadron decays and first evidence for the decay $${{{B}} ^0_{{s}}} \!\rightarrow \phi \phi \phi $$ B s 0 → ϕ ϕ ϕ

Aaij¹,

Adeva²,

Adinolfi³

et al. 2017

Eur. Phys. J. C

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Using decays to φ-meson pairs, the inclusive production of charmonium states in b-hadron decays is studied with pp collision data corresponding to an integrated luminosity of 3.0 fb −1 , collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. Denoting by B C ≡ B(b → C X) × B(C → φφ) the inclusive branching fraction of a b hadron to a charmonium state C that decays into a pair of φ mesons, ratios R

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Section: Masses and Natural Widths Of Charmonium Statesmentioning

confidence: 99%

Study of charmonium production in $${b} $$ b -hadron decays and first evidence for the decay $${{{B}} ^0_{{s}}} \!\rightarrow \phi \phi \phi $$ B s 0 → ϕ ϕ ϕ

Aaij¹,

Adeva²,

Adinolfi³

et al. 2017

Eur. Phys. J. C

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“…week ending 27 JULY 2012 042003-2 [4,5], and in the double-charmonium production process e þ e À ! J=c c " c [6,7].…”

mentioning

confidence: 99%

First Observation of theM1Transitionψ(3686)→γηc(2S
Ablikim¹,
Ачасов²,
Ambrose³
et al. 2012
Phys. Rev. Lett.
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Using a sample of 106 Â 10 6 c ð3686Þ events collected with the BESIII detector at the BEPCII storage ring, we have made the first measurement of the M1 transition between the radially excited charmonium S-wave spin-triplet and the radially excited S-wave spin-singlet states: c ð3686Þ ! c ð2SÞ. Analyses of the processes c ð3686Þ ! c ð2SÞ with c ð2SÞ ! K The quarkonium states play an important role in understanding the strong interaction between quarks. The charmonium states below the open-charm production threshold are relatively well understood, with the notable exception of the spin singlets [1], which include the P-wave state h c and the S-wave ground state c and its first radial excitation c ð2SÞ [2]. These are experimentally challenging because of the low production rates and spin-parity quantum numbers that are inaccessible in direct e þ e À annihilations. The c ð2SÞ was first observed by the Belle collaboration in the processIt was confirmed in the two-photon production of 6,7]. In this Letter, we report the first observation of c ð3686Þ ! c ð2SÞ,,5], and in the double-charmonium production process e þ e À ! J=c c " c [The data sample for this analysis consists of an integrated luminosity of 156 pb À1 (106 Â 10 6 events) produced at the peak of the c ð3686Þ resonance [17] and collected in the BESIII detector [18]. An additional 42 pb À1 of data were collected at a center-of-mass energy of ffiffi ffi s p ¼ 3:65 GeV to determine nonresonant continuum background contributions.The BESIII detector, described in detail in Ref. [18], has an effective geometrical acceptance of 93% of 4. A small-cell, helium-based main drift chamber in a 1-T magnetic field provides a charged-particle momentum resolution of 0.5% at 1 GeV=c, and specific-ionization (dE=dx) measurements for particle identification with a resolution better than 6% for electrons from Bhabha scattering. The cesium iodide electromagnetic calorimeter (EMC) measures photon energies with resolutions at 1.0 GeV of 2.5% and 5% in the detector's barrel (j cosj < 0:8, where is the polar angle with respect to the e þ direction) and end caps (0:86 < j cosj < 0:92), respectively. Additional particle identification is provided by a time-of-flight system with a time resolution of 80 ps (110 ps) for the barrel (end caps).Reconstructed charged tracks other than daughters of K

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“…Summary of the experimental measurements of the 1S hyperfine splitting in charmonium. γγ → η b → hadrons (red points): a) CLEO [48], b) Belle [49], c) BaBar [50], d) BaBar [51], e) Belle [52]. B → η b X (blue points): f) BaBar [53], g) Belle [54].…”

Section: New Hadronic Transitionsmentioning

confidence: 99%

Bottomonium physics above BB¯ thresholds with the Belle experiment

Tamponi

2016

AIP Conference Proceedings

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Abstract. The structure of heavy mesons located above the thresholds for the open flavor production has been largely discussed in the recent years. Their conventional description as pure BB bound state has been called into question by the study of the hadronic transitions to the lower states, and the observation of charged exotic states has highlighted the importance of the light quark degrees of freedom in the description of both charmonia and bottomonia. We will report the most recent experimental measurements performed by the Belle collaboration in the Y(4S), Y(5S) and Y(6S) regions, including the measurement of the ratio, the search for neutral states near the B 0B0 threshold, the first observation of the transition Υ(4S ) → ηh b (1P) and the study of the η transitions at the Υ(5S ) energy. The contribution to the study of the structure of these states coming from the measurement of hadronic transitions will be discussed.

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Observation ofηc′Production inγγFusion at CLEO

Cited by 102 publications

References 23 publications

Study of charmonium production in $${b} $$ b -hadron decays and first evidence for the decay $${{{B}} ^0_{{s}}} \!\rightarrow \phi \phi \phi $$ B s 0 → ϕ ϕ ϕ

Study of charmonium production in $${b} $$ b -hadron decays and first evidence for the decay $${{{B}} ^0_{{s}}} \!\rightarrow \phi \phi \phi $$ B s 0 → ϕ ϕ ϕ

First Observation of theM1Transitionψ(3686)→γηc(2S
Ablikim¹,
Ачасов²,
Ambrose³
et al. 2012
Phys. Rev. Lett.
Self Cite
37
1
8
0
View full text Add to dashboard Cite

Bottomonium physics above BB¯ thresholds with the Belle experiment

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Observation ofηc′Production inγγFusion at CLEO

Cited by 102 publications

References 23 publications

Study of charmonium production in $${b} $$ b -hadron decays and first evidence for the decay $${{{B}} ^0_{{s}}} \!\rightarrow \phi \phi \phi $$ B s 0 → ϕ ϕ ϕ

Study of charmonium production in $${b} $$ b -hadron decays and first evidence for the decay $${{{B}} ^0_{{s}}} \!\rightarrow \phi \phi \phi $$ B s 0 → ϕ ϕ ϕ

First Observation of theM1Transitionψ(3686)→γηc(2SAblikim1, Ачасов2, Ambrose3 et al. 2012Phys. Rev. Lett.Self Cite37180View full textAdd to dashboardCite

Bottomonium physics above BB¯ thresholds with the Belle experiment

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About

First Observation of theM1Transitionψ(3686)→γηc(2S
Ablikim¹,
Ачасов²,
Ambrose³
et al. 2012
Phys. Rev. Lett.
Self Cite
37
1
8
0
View full text Add to dashboard Cite