Hadron formation and attenuation in deep inelastic lepton scattering off nuclei

Falter, T.; Cassing, W.; Gallmeister, K.; Mosel, U.

doi:10.1016/j.physletb.2004.04.089

Cited by 43 publications

(40 citation statements)

References 37 publications

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“…The studies in Refs. [39,40] (see also [41]) have shown that the dominant final-state-interactions of the hadrons with maximum momentum -as measured by the HERMES Collaboration [42] -are compatible with the concepts described above. These independent investigations impose severe constraints on hadron attenuation in a medium that might possibly be attributed to a QGP phase (cf.…”

Section: Introductionmentioning

confidence: 61%

“…The elastic and inelastic interactions with their fractional cross section are modeled in the HSD approach in the same way as for ordinary hadrons with the same quantum numbers via the Fritiof model [47] (including Pythia v5.5 with Jetset v7.3 for the production and fragmentation of jets [48]). This concept -oriented along the additive quark model -has been proven to work rather well for nucleus-nucleus collisions from AGS to RHIC energies [51,52,53] as well as in hadron formation and attenuation in deep inelastic lepton scattering off nuclei [39,40]. We stress again that the latter reactions are important to understand the attenuation of pre-hadrons or ordinary hadrons with high momentum in 'cold' nuclear matter [37].…”

Section: Perturbative Treatment Of High P ⊥ Hadrons and Jetsmentioning

confidence: 89%

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Jet quenching by (pre-)hadronic final state interactions at RHIC

Gallmeister

Cassing

2005

Nuclear Physics A

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Within a hadron-string dynamical transport approach (HSD) we investigate the attenuation of high transverse momentum (p ⊥ ) hadrons as well as the suppression of 'near-side' and 'far-side' jets in Au + Au collisions at invariant energies √ s = 200 GeV and √ s = 62.4 GeV in comparison to the data available from the Relativistic Heavy-Ion Collider (RHIC). From our transport studies we find that a significant part of the high p ⊥ hadron attenuation seen experimentally can be attributed to inelastic interactions of 'leading' pre-hadrons with the dense hadronic environment. In addition, we also show results of 'near-side' and 'far-side' angular correlations of high p ⊥ particles from Au+Au collisions at √ s = 200 GeV and √ s = 62.4 GeV within this (pre-)hadronic attenuation scenario. It turns out that the 'near-side' correlations are unaltered -in accordance with experiment -whereas the 'far-side' correlations are suppressed by up to ∼ 60% in central collisions. Since a much larger suppression is observed experimentally for these reactions in central reactions we conclude that there should be strong additional (and earlier) partonic interactions in the dense and possibly colored medium created in Au+Au collisions at RHIC.

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Section: Introductionmentioning

confidence: 61%

Section: Perturbative Treatment Of High P ⊥ Hadrons and Jetsmentioning

confidence: 89%

Jet quenching by (pre-)hadronic final state interactions at RHIC

Gallmeister

Cassing

2005

Nuclear Physics A

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“…In Ref. [27] the hadron attenuation is investigated within the framework of the Boltzmann-Uehling-Uhlenbeck transport model. Since this is a coupled-channel approach, hadrons are not only absorbed, but can also be produced.…”

Section: A Change In R Hmentioning

confidence: 99%

Hadronization in semi-inclusive deep-inelastic scattering on nuclei

et al. 2007

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A series of semi-inclusive deep-inelastic scattering measurements on deuterium, helium, neon, krypton, and xenon targets has been performed in order to study hadronization. The data were collected with the HERMES detector at the DESY laboratory using a 27.6 GeV positron or electron beam. Hadron multiplicities on nucleus A relative to those on the deuteron, R h A , are presented for various hadrons (π + , π − , π 0 , K + , K − , p, andp) as a function of the virtual-photon energy ν, the fraction z of this energy transferred to the hadron, the photon virtuality Q 2 , and the hadron transverse momentum squared p 2 t . The data reveal * Corresponding author. E-mail address: james.stewart@desy.de (J. Stewart). B 780 (2007) A on ν and z can largely be described as a dependence on a single variable L c , which is a combination of ν and z. The dependence on L c suggests in which kinematic conditions partonic and hadronic mechanisms may be dominant. The behaviour of R π A at large p 2 t constitutes tentative evidence for a partonic energy-loss mechanism. The A-dependence of R h A is investigated as a function of ν, z, and of L c . It approximately follows an A α form with α ≈ 0.5-0.6. HERMES Collaboration / Nuclear Physics

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“…The wealth of theoretical model calculations and studies [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] reflect the strong interest of the community in hadron-multiplicities on nuclei, as they provide information on the space (time) structure of the hadronization process. It is beyond the scope of this paper to compare the results of the various models with the data.…”

Section: Introductionmentioning

confidence: 99%

Multidimensional study of hadronization in nuclei

Airapetian¹,

Акопов²,

Akopov³

et al. 2011

Eur. Phys. J. A

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Abstract.Hadron multiplicities in semi-inclusive deep-inelastic scattering were measured on neon, krypton, and xenon targets relative to deuterium at an electron(positron)-beam energy of 27.6 GeV at HERMES. These ratios were determined as a function of the virtual-photon energy ν, its virtuality Q 2 , the fractional hadron energy z and the transverse hadron momentum with respect to the virtual-photon direction p t. Dependences were analysed separately for positively and negatively charged pions and kaons as well as protons and antiprotons in a two-dimensional representation. Compared to the one-dimensional dependences, some new features were observed. In particular, when z > 0.4 positive kaons do not show the strong monotonic rise of the multiplicity ratio with ν as exhibited by pions and negative kaons. Protons were found to behave very differently from the other hadrons.The HERMES Collaboration (A. Airapetian et al.): Multidimensional study of hadronization . . .

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Hadron formation and attenuation in deep inelastic lepton scattering off nuclei

Cited by 43 publications

References 37 publications

Jet quenching by (pre-)hadronic final state interactions at RHIC

Jet quenching by (pre-)hadronic final state interactions at RHIC

Hadronization in semi-inclusive deep-inelastic scattering on nuclei

Multidimensional study of hadronization in nuclei

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