Exclusive charm production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover><mml:mi>p</mml:mi></mml:mrow></mml:math>collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>≲</mml:mo><mml:mn>15</mml:mn></mml:mrow></mml:math>GeV

Титов, А. И.; Kämpfer, B.

doi:10.1103/physrevc.78.025201

Cited by 46 publications

(77 citation statements)

References 33 publications

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“…This is in contrast to the findings forp p →Λ − c Λ + c andp p →D 0 D 0 , where models using simple [16,17] or Reggeized hadron exchange [18,19] find cross sections which are two to three orders of magnitude larger than those from the handbag-type mechanism. The crucial point in these models seems to be the strength of the D ( * ) pY c coupling which is either fixed by SU (4)-flavor symmetry [16][17][18] or by QCD sum rules [19]. In our case this coupling corresponds to the form factors G and S T .…”

Section: Resultscontrasting

confidence: 54%

A Perturbative QCD Approach to $$\varvec{\pi ^{-}~p \rightarrow D^{-}~{\varLambda }_{c}^{+}}$$ π - p → D - Λ c +

Kofler

Schweiger

2017

Few-Body Syst

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We employ the generalized parton picture to analyze the reaction π − p → D − Λ + c . Thereby it is assumed that the process amplitude factorizes into one for the perturbatively calculable subprocessū u →c c and hadronic matrix elements that can be parameterized in terms of generalized parton distributions for the π − → D − and p → Λ + c transitions, respectively. Representing these parton distributions in terms of valencequark light-cone wave functions for π, D, p and Λ c allows us to make numerical predictions for unpolarized differential and integrated cross sections as well as spin observables. In the kinematical region where this approach is supposed to work, i.e. s 20 GeV 2 and in the forward hemisphere, the resulting cross sections are of the order of nb. This is a finding that could be of interest in view of plans to measure π − p → D − Λ + c , e.g., at J-PARC or COMPASS.

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Section: Resultscontrasting

confidence: 54%

A Perturbative QCD Approach to $$\varvec{\pi ^{-}~p \rightarrow D^{-}~{\varLambda }_{c}^{+}}$$ π - p → D - Λ c +

Kofler

Schweiger

2017

Few-Body Syst

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“…This is sufficiently large that the experiment we propose could amass a sample ten or more times larger than those of the B factories. [85,86]. Given their uncertainties, these estimates are in agreement as to the order of magnitude of the cross section.…”

Section: Charm Mixing Cp Violation and Rare Decayssupporting

confidence: 66%

“…Since some new-physics models predict differing effects in the charge-2/3 ("up-type") and -1/3 quark sectors [32,81], it is important to carry out such studies not only with s and b hadrons, but with charm mesons as well -the only up-type system for which meson mixing can be measured. While the total charm-production cross section for ≈ 8 GeV antiprotons incident on proton or nucleon targets is challenging to compute from first principles, recent phenomenological estimates imply values in the 1-10 µb range [82,83,84,85,86]. This is sufficiently large that the experiment we propose could amass a sample ten or more times larger than those of the B factories.…”

Section: Charm Mixing Cp Violation and Rare Decaysmentioning

confidence: 80%

Intensity-Frontier Antiproton Physics with The Antiproton Annihilation Spectrometer (TAPAS) at Fermilab

Apollinari¹,

Asner²,

Baldini³

et al. 2011

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SummaryThe Fermilab Antiproton Source is the world's most intense source of antimatter. With the Tevatron program now behind us, this unique facility can help make the case for Fermilab's continued accelerator operations. The Antiproton Source can be used for unique, dedicated antimatter studies, including medium-energy p-annihilation experiments.We propose to assemble a powerful, yet cost-effective, solenoidal magnetic spectrometer for antiproton-annihilation events, and to use it at the Fermilab Antiproton Accumulator to measure the charm production cross section, study rare hyperon decays, search for hyperon CP asymmetry, precisely measure the properties of several charmonium and nearby states, and make the first measurements of the Drell-Yan continuum in medium-energy antiproton annihilation. Should the charm production cross section be as large as some have proposed, we will also be able to measure D 0 -D 0 mixing with high precision and discover (or sensitively limit) charm CP violation. The observation of charm or hyperon CP violation would be evidence for physics beyond the Standard Model, with possible implications for the origin of the baryon asymmetry of the universe -the question of what happened to all the antimatter that must have been produced in the Big Bang.The experiment will be carried out by an international collaboration and will require some four years of running time. As possibly the sole hadron experiment in progress at Fermilab during that time, it will play an important role in maintaining a broad particle physics program at Fermilab and in the U.S. It will thus help us to continue attracting creative and capable young people into science and technology, and introducing them to the important technologies of accelerators, detectors, and data acquisition and analysiskey roles in society that accelerator-based particle physics has historically played.i

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“…In addition, the production of charmed baryon states in the pp collisions has been investigated within many theoretical models, such as the quark-diquark picture, a handbag approach, a quark-gluon string model which based on Regge asymptotics, meson-exchange model, and single-channel effective Lagrangian model [32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Role ofY(4630)in thepp¯→<

et al. 2016

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We investigate the charmed baryon production reaction pp → ΛcΛc in an effective Lagrangian approach. Besides the t-channel D 0 and D * 0 mesons exchanges, the s-channel Y (4630) meson exchange is taken into account. For the total cross sections, the D 0 and D * 0 mesons provide minor background contributions, while the Y (4630) state gives a clear peak structure with the magnitude of 10 µb at center of mass energy 4.63 GeV. Basing on the results, we suggest that the reaction of pp → ΛcΛc can be used to search for the 1 −− charmonium-like Y (4630) state, and our predictions can be tested in future by thePANDA facility.

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Exclusive charm production inp¯pcollisions ats≲15GeV

Cited by 46 publications

References 33 publications

A Perturbative QCD Approach to $$\varvec{\pi ^{-}~p \rightarrow D^{-}~{\varLambda }_{c}^{+}}$$ π - p → D - Λ c +

A Perturbative QCD Approach to $$\varvec{\pi ^{-}~p \rightarrow D^{-}~{\varLambda }_{c}^{+}}$$ π - p → D - Λ c +

Intensity-Frontier Antiproton Physics with The Antiproton Annihilation Spectrometer (TAPAS) at Fermilab

Role ofY(4630)in thepp¯→<

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