Diffractive production of the charmed baryon Λ+c at the CERN ISR

Giboni, Karl; DiBitonto, D.; Barone, M.; Block, M. M.; Böhm, A.; Campanini, R.; Ceradini, F.; Eickmeyer, J.; Hanna, D.; Irion, J.; Kernan, A.; Ludwig, H.W.; Müller, F.; Naroska, B.; Navach, F.; Nussbaum, M.; O'Connor, J.; Rubbia, C.; Schinzel, D.; Seebrunner, H. J.; Staude, A.; Tirler, R.; Dalen, G. Van; Voss, R.; Wojslaw, R.

doi:10.1016/0370-2693(79)91291-7

Cited by 84 publications

(21 citation statements)

References 8 publications

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“…Their results lead to the diffractive charm production cross section σ dif f (cc) pp = 0.6 − 0.7 µb which is about two order of magnitude smaller than the cross section measured at ISR [28]. This result agrees with the upper limit found for coherent diffractive production of charm, pSi → ccX +Si, in the E653 experiment [30] at Fermilab.…”

Section: Relevant Experimental Factssupporting

confidence: 80%

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Diffractive Higgs production from intrinsic heavy flavors in the proton

et al. 2006

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We propose a novel mechanism for exclusive diffractive Higgs production pp → pHp in which the Higgs boson carries a significant fraction of the projectile proton momentum. This mechanism will provide a clear experimental signal for Higgs production due to the small background in this kinematic region. The key assumption underlying our analysis is the presence of intrinsic heavy flavor components of the proton bound state, whose existence at high light-cone momentum fraction x has growing experimental and theoretical support. We also discuss the implications of this picture for exclusive diffractive quarkonium and other channels.

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Section: Relevant Experimental Factssupporting

confidence: 80%

“…The diffractive cross section σ(pp → Λ c X + p), at √ s = 63 GeV was measured at the ISR to be is of order 10 to 60 µb [28]. This result seems to be in contradiction with findings of Fermilab experiments searching for diffractive charm production [29,30].…”

Section: Relevant Experimental Factscontrasting

confidence: 52%

Diffractive Higgs production from intrinsic heavy flavors in the proton

et al. 2006

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“…We use one loop approximation with three, four and five flavors for the production of charm, beauty and top respectively. The coupling in (45) and (51), α s (1/rho), should be taken on a soft scale, 1/ρ . As we have just explained, very large distances ρ are suppressed, since the saturated dipole cross section levels off and is independent of ρ.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Three experiments searched for open charm production in diffractive events. Diffractive production of Λ c was first detected in experiment [45] at √ s = 63 GeV at ISR. The reported cross section σ(pp → Λ c Xp) = 10 − 40 µb is quite above our calculations.…”

Section: Numerical Resultsmentioning

confidence: 99%

Diffractive excitation of heavy flavors: Leading twist mechanisms

Kopeliovich¹,

Potashnikova²,

Schmidt³

et al. 2007

Phys. Rev. D

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Diffractive production of heavy flavors is calculated within the light-cone dipole approach. Novel leading twist mechanisms are proposed, which involve both short and long transverse distances inside the incoming hadron. Nevertheless, the diffractive cross section turns out to be sensitive to the primordial transverse momenta of projectile gluons, rather than to the hadronic size. Our calculations agree with the available data for diffractive production of charm and beauty, and with the observed weak variation of the diffraction-to-inclusive cross section ratios as function of the hard scale.

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“…Detailed derivations based on the OPE have been given in [4,5]. The hypothesis of the intrinsic quark components in the proton was suggested in [6] to explain the large cross-section for the forward open charm production in pp collision at ISR energies [7][8][9][10]. The magnitude of the ISR cross sections suggests that the intrinsic charm probability in the proton is approximately of order 1 %; however, theoretical and experimental uncertainties make it difficult to make an accurate estimate.…”

Section: Motivation Of This Reviewmentioning

confidence: 99%

The physics of heavy quark distributions in hadrons: Collider tests

Brodsky

Bednyakov

Lykasov

et al. 2017

Progress in Particle and Nuclear Physics

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We present a review of the current understanding of the heavy quark distributions in the nucleon and their impact on collider physics. The origin of strange, charm and bottom quark pairs at high light-front (LF) momentum fractions in hadron wavefunctions -the "intrinsic" quarks, is reviewed. The determination of heavy-quark parton distribution functions (PDFs) is particularly significant for the analysis of hard processes at LHC energies. We show that a careful study of the inclusive production of open charm and the production of γ/Z/W particles, accompanied by the heavy jets at large transverse momenta can give essential information on the intrinsic heavy quark (IQ) distributions. We also focus on the theoretical predictions concerning other observables which are very sensitive to the intrinsic charm contribution to PDFs including Higgs production at high x F and novel fixed target measurements which can be tested at the LHC.

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Diffractive production of the charmed baryon Λ+c at the CERN ISR

Cited by 84 publications

References 8 publications

Diffractive Higgs production from intrinsic heavy flavors in the proton

Diffractive Higgs production from intrinsic heavy flavors in the proton

Diffractive excitation of heavy flavors: Leading twist mechanisms

The physics of heavy quark distributions in hadrons: Collider tests

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