Studies of quark and diquark fragmentation into identified hadrons in deep inelastic muon-proton scattering

Arneodo, M.; Arvidson, Adam Regn; Aubert, J.J.; Badełek, B.; Beaufays, J.; Becks, K. H.; Bee, C. P.; Benchouk, C.; Berghoff, G.; Bird, I.; Blum, D.; Böhm, E.; Bouard, X. De; Brasse, F.W.; Braun, H. M.; Broll, C.; Brown, S.; Brück, H.; Calén, H.; Callebaut, D. K.; Carr, J.; Chima, J. S.; Ciborowski, J.; Clifft, R. W.; Cobb, J.H.; Coignet, G.; Combley, F.; Coughlan, J. A.; Court, G.R.; D’Agostini, G.; Dahlgren, S.; Davies, Joshua; Dengler, F.; Derado, I.; Dosselli, U.; Dreyer, T.; Dress, J.; Dumont, J. J.; Düren, M.; Eckardt, V.; Edwards, A.; Edwards, M.; Ernst, Thomas; Eszes, G.; Favier, Jean; Ferrero, M. I.; Figiel, J.; Flauger, W.; Foster, J. M.; Gabathuler, E.; Gajewski, J.; Gamet, R.; Gayler, J.; Geddes, N. I.; Giubellino, P.; Gößling, C.; Grafström, P.; Grard, F.; Gustafsson, L.; Haas, J.; Hagberg, E.; Hasert, F.J.; Hayman, P.; Heusse, P.; Hoppe, C.; Jaffré, M.; Jachołkowska, A.; Janata, F.; Jancsó, Gábor; Johnson, A.; Kabuß, E.; Kellner, G.; Korbel, V.; Krüger, J.; Kullander, S.; Landgraf, U.; Lanske, D.; Loken, J.; Mong, M.; Maire, M.; Manz, A.; Mohr, W.; Montanet, F.; Montgomery, H. E.; Mount, R.; Nagy, E.; Nassalski, J.; Norton, P. R.; Oakham, F. G.; Osborne, A.M.; Pascaud, C.; Paul, Larissa; Pawlik, B.; Payre, P.; Peroni, C.; Pessard, H.; Pettingale, J.; Pietrzyk, U.; Pönsgen, B.; Pötsch, M.; Preissner, H.; Renton, P.; Ribarics, P.; Rith, Klaus; Rondio, E.; Schlagböhmer, A.; Schiemann, H.; Schmitz, N.; Schneegans, M.; Schröder, T.; Schultze, K.; Shiers, J.; Sloan, T.; Stier, H. E.; Stockhausen, W.; Studt, M.; Taylor, G. N.; Thénard, J.M.; Thompson, J.C.; Torre, A. de la; Töth, J.; Urbán, L.; Wahlen, H.; Wallucks, W.; Whalley, M. A.; Wheeler, S.; Williams, W. S. C.; Wimpenny, S.; Windmolders, R.; Wolf, G.

doi:10.1016/0370-2693(85)90466-6

Cited by 44 publications

(7 citation statements)

References 32 publications

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“…Measurements of hadron multiplicity distributions in the target fragmentation region in DIS on the nucleon have been reported by several fixed-target experiments using electron beams (Cornell Synchrotron [61]) and muon beams (CERN EMC [62][63][64], FNAL E665 [25]), as well as at the HERA electron-proton collider [65][66][67][68]. Slow hadron distributions were also measured in neutrino-proton DIS experiments [69][70][71].…”

Section: Experimental Distributionsmentioning

confidence: 99%

“…The multiplicity distributions of hadrons with x F < ∼ −0.2 are approximately independent of Q 2 for fixed x. Scaling of the distributions is observed in all quoted electron and muon experiments, covering the valence region x > 0.2 [61], the region x < ∼ 0.1 [25,[62][63][64], and the small-x region x < 10 −2 [65][66][67][68]. This behavior is consistent with theoretical expectations based on QCD factorization of the conditional DIS cross sections in the target fragmentation region [30,31].…”

Section: Experimental Distributionsmentioning

confidence: 99%

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Electron-deuteron deep-inelastic scattering with spectator nucleon tagging and final-state interactions at intermediate x

Strikman

Weiß

2018

Phys. Rev. C

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We consider electron-deuteron deep-inelastic scattering (DIS) with detection of a proton in the nuclear fragmentation region ("spectator tagging") as a method for extracting the free neutron structure functions and studying their nuclear modifications. Such measurements could be performed at a future Electron-Ion Collider (EIC) with suitable forward detectors. The measured proton recoil momentum ( < ∼ 100 MeV in the deuteron rest frame) specifies the deuteron configuration during the high-energy process and permits a controlled theoretical treatment of nuclear effects. Nuclear and nucleonic structure are separated using methods of light-front quantum mechanics. The impulse approximation (IA) to the tagged DIS cross section contains the free neutron pole, which can be reached by on-shell extrapolation in the recoil momentum. Final-state interactions (FSI) distort the recoil momentum distribution away from the pole. In the intermediate-x region 0.1 < x < 0.5 FSI arise predominantly from interactions of the spectator proton with slow hadrons produced in the DIS process on the neutron (rest frame momenta < ∼ 1 GeV, target fragmentation region). We construct a schematic model describing this effect, using final-state hadron distributions measured in nucleon DIS experiments and low-energy hadron scattering amplitudes. We investigate the magnitude of FSI, their dependence on the recoil momentum (angular dependence, forward/backward regions), their analytic properties, and their effect on the on-shell extrapolation. We comment on the prospects for neutron structure extraction in tagged DIS with EIC. We discuss possible extensions of the FSI model to other kinematic regions (large/small x). In tagged DIS at x ≪ 0.1 FSI resulting from diffractive scattering on the nucleons become important and require separate treatment.deuteron using LF quantum mechanics, including the IA and FSI amplitudes. We use empirical hadron distributions, measured in ep/ed DIS, to describe the slow part of the hadronic final state produced on the nucleon in the deuteron. The interactions of the slow hadrons with the spectator are treated as on-shell scattering with an effective cross section. Off-shell effects can be absorbed into the effective cross section and the slow hadron distribution; they are physically indistinguishable from effects of the finite hadron formation time and can consistently be accounted for in this way. This model amounts to a minimal description of FSI based on the space-time evolution of the DIS process and empirical hadron distributions.In the present study we use the apparatus of LF quantum mechanics to describe the initial-state nuclear structure and final-state interactions in tagged DIS. High-energy processes such as DIS effectively probe a strongly interacting system at fixed LF time x + = x 0 + x 3 , along the direction defined by the reaction axis. In LF quantization one follows the time evolution of the system in x + and describes its structure by wave functions and densities at x + = const. [32][33][34][35][36]....

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Section: Experimental Distributionsmentioning

confidence: 99%

Section: Experimental Distributionsmentioning

confidence: 99%

Electron-deuteron deep-inelastic scattering with spectator nucleon tagging and final-state interactions at intermediate x

Strikman

Weiß

2018

Phys. Rev. C

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“…The experimental data are taken from Refs. [27,28,29]. The original SIDIS data in terms of x F have been converted to the variable z by using the method of Ref.…”

Section: Octet Baryon Production In Charged Lepton Dismentioning

confidence: 99%

“…The experimental data are taken from Refs. [27,28,29]. The data points with full circles, triangles and squares are for particle production measured by the E665, EMC and H1 collaborations, respectively; open circles and triangles indicate the data for anti-particle production measured by the E665 and EMC collaborations, respectively.…”

Section: Octet Baryon Production In Charged Lepton Dismentioning

confidence: 99%

Mass suppression in octet baryon production

Yang

Schmidt

2003

Phys. Rev. D

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There is a striking suppression of the cross section for production of octet baryons in e + e − annihilation, as the mass of the produced hadron increases. We present a simple parametrization for the fragmentation functions into octet baryons guided by two input models: the SU(3) flavor symmetry part is given by a quark-diquark model, and the baryon mass suppression part is inspired by the string model. We need only eight free parameters to describe the fragmentation functions for all octet baryons. These free parameters are determined by a fit to the experimental data of octet baryon production in e + e − annihilation. Then we apply the obtained fragmentation functions to predict the cross section of the octet baryon production in charged lepton DIS and find consistency with the available experimental data. Furthermore, baryon production in pp collisions is suggested to be an ideal domain to check the predicted mass suppression.

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“…Experimentally it is known that the yield of baryons is about one order of magnitude higher in the backward hemisphere of the γp center of mass frame ("target fragmentation region") than for forward hemisphere baryons ("current fragmentation region") [24][25][26]. Furthermore, baryons produced by current fragmentation have predominantly large momenta in the target rest frame ( > ∼ several GeV), while those in the backward center of mass jet are generally slow.…”

Section: Kinematics Of Target Fragmentationmentioning

confidence: 99%

Meson cloud of the nucleon in polarized semi-inclusive deep-inelastic scattering

Melnitchouk

Thomas

1995

Z. Physik A - Hadrons and Nuclei

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Abstract. We investigate the possibility of identifying an explicit pionic component of the nucleon through measurements of polarized A ++ baryon fragments produced in deepinelastic leptoproduction off polarized protons, which may help to identify the physical mechanism responsible for the breaking of the Gottfried sum rule. The pion-exchange model predicts highly correlated polarizations of the A + § and target proton, in marked contrast with the competing diquark fragmentation process. Measurement of asymmetries in polarized A production may also reveal the presence of a kaon cloud in the nucleon.

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Studies of quark and diquark fragmentation into identified hadrons in deep inelastic muon-proton scattering

Cited by 44 publications

References 32 publications

Electron-deuteron deep-inelastic scattering with spectator nucleon tagging and final-state interactions at intermediate x

Electron-deuteron deep-inelastic scattering with spectator nucleon tagging and final-state interactions at intermediate x

Mass suppression in octet baryon production

Meson cloud of the nucleon in polarized semi-inclusive deep-inelastic scattering

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