Near threshold enhancement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>mass spectrum in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>Ψ</mml:mi></mml:math>decay

Sibirtsev, A.; Haidenbauer, J.; Krewald, S.; Meißner, Ulf‐G.; Thomas, A. W.

doi:10.1103/physrevd.71.054010

Cited by 134 publications

(131 citation statements)

References 46 publications

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“…For the latter case several explanations have been put forth, including scenarios that invoke NN bound states or so far unobserved meson resonances. However, it was also shown that a conventional but plausible interpretation of the data can be given simply in terms of the final-state interaction (FSI) between the produced proton and antiproton [16,17,18,19,20]. Specifically, calculations of our group, utilizing the Jülich NN model [21,22,23] and performed within the Watson-Migdal approach [24,25], could reproduce the mass dependence of thepp spectrum close to the threshold by the S -wavepp FSI for various decays [16,26,27].…”

Section: Introductionmentioning

confidence: 99%

The electromagnetic form factors of the proton in the timelike region

2014

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The reactionspp → e + e − and e + e − →pp are analyzed in the near-threshold region. Specific emphasis is put on the role played by the interaction in the initial-or final antinucleon-nucleon (NN) state which is taken into account rigorously. For that purpose a recently publishedNN potential derived within chiral effective field theory and fitted to results of a new partial-wave analysis ofpp scattering data is employed. Our results provide strong support for the conjecture that the pronounced energy dependence of the e + e − ↔pp cross section, seen in pertinent experiments, is primarily due to thepp interaction. Predictions for the proton electromagnetic form factors G E and G M in the timelike region, close to theNN threshold, and for spin-dependent observables are presented. The steep rise of the effective form factor for energies close to thepp threshold is explained solely in terms of thepp interaction. The corresponding experimental information is quantitatively described by our calculation.

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Section: Introductionmentioning

confidence: 99%

The electromagnetic form factors of the proton in the timelike region

2014

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“…[2]. Since the discovery of the X(1835) state, many models have been proposed to explain its properties [3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19].…”

Section: Introductionmentioning

confidence: 99%

Strong and electromagnetic decays ofX(1835) as a baryonium state

Ma¹

2009

J. Phys. G: Nucl. Part. Phys.

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With the assumption that the recently observed X(1835) is a baryonium state we have studied the strong decays of X(1835) → η (′) π + π − , η (′) π 0 π 0 and the electromagnetic decay of X(1835) → 2γ in the framework of effective Lagrangian formalism. In the present investigation we have included the contributions from the iso-singlet light scalar resonances but we have not included the isospin violating effect. Our result for the strong decay of− is smaller than the observed data. The decay width for the radiative decay of X(1835) → 2γ is consistent with the assumption that it decays through the glueball. In addition, the width for the strong decay of X(1835) → ηπ + π − is larger than that of the strong decay of X(1835) → η ′ π + π − due to the large phase space and coupling constant g NN η . From our investigation, it is not possible to interpret X(1835) as a baryonium.

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“…The DM2 experiment observed a "dip" in the cross section of the process e + e − → 3(π + π − ) near 1.9 GeV, confirmed later by the BaBar. The origin of the "dip" remains unclear, but the most popular explanation is based on a hypothesis of a presence of the under-threshold (pp) resonance discussed in many theoretical papers [15].…”

Section: Six Pion Productionmentioning

confidence: 99%

Overview of the CMD-3 recent results ate⁺e⁻collider VEPP-2000

et al. 2016

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Abstract. Since December 2010, the CMD-3 detector has collected data at the electronpositron collider VEPP-2000. The sample of the accumulated data corresponds to about 60 pb −1 of integrated luminosity in the c.m. energy from 0.32 up to 2 GeV. Preliminary results of the analysis of various processes e + e − annihilation to hadrons are presented. It is shown the processes with multihadron events have several intermediate states which must be taken into account to correctly describe the angular and invariant mass distributions as well as cross section dependence versus energy.

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Near threshold enhancement of thepp¯mass spectrum inJ/Ψdecay

Cited by 134 publications

References 46 publications

The electromagnetic form factors of the proton in the timelike region

The electromagnetic form factors of the proton in the timelike region

Strong and electromagnetic decays ofX(1835) as a baryonium state

Overview of the CMD-3 recent results ate⁺e⁻collider VEPP-2000

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Near threshold enhancement of thepp¯mass spectrum inJ/Ψdecay

Cited by 134 publications

References 46 publications

The electromagnetic form factors of the proton in the timelike region

The electromagnetic form factors of the proton in the timelike region

Strong and electromagnetic decays ofX(1835) as a baryonium state

Overview of the CMD-3 recent results ate+e−collider VEPP-2000

Contact Info

Product

Resources

About

Overview of the CMD-3 recent results ate⁺e⁻collider VEPP-2000