Future prospects for hadron physics at P ¯ ANDA

Wiedner, U.

doi:10.1016/j.ppnp.2011.04.001

Cited by 98 publications

(80 citation statements)

References 121 publications

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“…The detector consists of a target and a forward spectrometer each with several layers of specialized subcomponents [86]. ThePANDA physics program in the baryon sector includes in particular the spectrum and properties of (multiple-) strange and charmed baryons, the dynamics of pp reactions, and structure physics such as timelike form factors in the range between 5 and 28 GeV 2 as well as transverse parton distributions [87].…”

Section: Mamimentioning

confidence: 99%

Baryons as relativistic three-quark bound states

Eichmann

Sanchis-Alepuz

Williams

et al. 2016

Progress in Particle and Nuclear Physics

436

530

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We review the spectrum and electromagnetic properties of baryons described as relativistic three-quark bound states within QCD. The composite nature of baryons results in a rich excitation spectrum, whilst leading to highly non-trivial structural properties explored by the coupling to external (electromagnetic and other) currents. Both present many unsolved problems despite decades of experimental and theoretical research. We discuss the progress in these fields from a theoretical perspective, focusing on nonperturbative QCD as encoded in the functional approach via Dyson-Schwinger and Bethe-Salpeter equations. We give a systematic overview as to how results are obtained in this framework and explain technical connections to lattice QCD. We also discuss the mutual relations to the quark model, which still serves as a reference to distinguish 'expected' from 'unexpected' physics. We confront recent results on the spectrum of non-strange and strange baryons, their form factors and the issues of two-photon processes and Compton scattering determined in the DysonSchwinger framework with those of lattice QCD and the available experimental data. The general aim is to identify the underlying physical mechanisms behind the plethora of observable phenomena in terms of the underlying quark and gluon degrees of freedom.

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Section: Mamimentioning

confidence: 99%

Baryons as relativistic three-quark bound states

Eichmann

Sanchis-Alepuz

Williams

et al. 2016

Progress in Particle and Nuclear Physics

436

530

View full text Add to dashboard Cite

show abstract

“…We now turn to the computation of the correlation function (1) for the Λ c → p transition, employing two different interpolating currents for Λ c and, in each case, the three transition currents listed in (2). Throughout this calculation we neglect the light-quark masses everywhere; the only two mass parameters in the correlation function are the c-quark mass m c and the nucleon mass m N , the latter entering the nucleon DA's.…”

Section: Accessing the Form Factors With Hadronic Dispersion Relationsmentioning

confidence: 99%

“…These strong interaction parameters can be used as normalization inputs in the models of charm production in the proton-antiproton collisions, such as the future experiment PANDA [2].…”

Section: Introductionmentioning

confidence: 99%

Form factors and strong couplings of heavy baryons from QCD light-cone sum rules

Khodjamirian

Klein

Mannel

et al. 2011

J. High Energ. Phys.

135

136

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We derive QCD light-cone sum rules for the hadronic matrix elements of the heavy baryon transitions to nucleon. In the correlation functions the Λ c , Σ c and Λ b -baryons are interpolated by three-quark currents and the nucleon distribution amplitudes are used. To eliminate the contributions of negative parity heavy baryons, we combine the sum rules obtained from different kinematical structures. The results are then less sensitive to the choice of the interpolating current. We predict the Λ b → p form factor and calculate the widths of the Λ b → pℓν l and Λ b → pπ decays. Furthermore, we consider double dispersion relations for the same correlation functions and derive the light-cone sum rules for the Λ c N D ( * ) and Σ c N D ( * ) strong couplings. Their predicted values can be used in the models of charm production in pp collisions.

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“…In the near future, charmed hadron production will be studied in the pp annihilation in the (P ANDA) experiment at the FAIR in GSI, Darmstadt [35]. The advantage of using antiprotons in the study of the charmed baryon is that in pp collisions the production of no extra particle is needed for the charm conservation, which reduces the threshold energy.…”

Section: Charmed Hadron Production Inpp Annihilationmentioning

confidence: 99%

Nuclear reactions at intermediate energies

Shyam

2016

EPJ Web of Conferences

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In the domain of Nuclear reactions at intermediate energies, the QCD coupling constant α s is large enough (∼ 0.3 -0.5) to render the perturbative calculational techniques inapplicable. In this regime the quarks are confined into colorless hadrons and it is expected that effective field theories of hadron interactions via exchange of hadrons, provide useful tools to describe such reactions. In this contribution we discuss the application of one such theory, the effective Lagrangian model, in describing the hadronic reactions at intermediate energies whose measurements are the focus of a vast international experimental program.In the quest for understanding the quantum chromodynamics (QCD), the hadron-hadron, hadron-photon and hadron-lepton reactions have played a major role. From these studies two quite distinct regimes of QCD have emerged. The first regime is of those processes that involve very high momentum transfers. Here the asymptotic freedom property of QCD has enabled the perturbative QCD (pQCD) methods to describe [1] a large set of high energy large momentum transfer reaction observables with great precision, providing the most precise test of QCD to date [2,3].The second regime that includes nuclear reactions at intermediate energies, is characterized by the confinement of quarks inside the hadrons. This remarkable feature, along with the running of the QCD coupling constant (α s ) towards larger values makes the pQCD methods inapplicable -one requires techniques that can solve the theory exactly. To date, the only fully predictive non-perturbative method for studying QCD at low energies is 201 , 02002 (2016) EPJ Web of Conferences

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Future prospects for hadron physics at P ¯ ANDA

Cited by 98 publications

References 121 publications

Baryons as relativistic three-quark bound states

Baryons as relativistic three-quark bound states

Form factors and strong couplings of heavy baryons from QCD light-cone sum rules

Nuclear reactions at intermediate energies

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