Particle production in cosmic ray collisions

Dar, Arnon

doi:10.1016/0370-2693(79)90037-6

Cited by 9 publications

(4 citation statements)

References 21 publications

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“…17) The latter was found successfuI. 9 ), 17) In the new version of BHM proposed in the present paper, choice of the latter at the quark level is a necessary consequence from the model.…”

Section: Numerical Results and Comparison With Experimentsmentioning

confidence: 71%

“…17) The latter was found successfuI. 9 ), 17) In the new version of BHM proposed in the present paper, choice of the latter at the quark level is a necessary consequence from the model. Detailed calculations of the mean shower particle multiplicities in central nucleus-nucleus collisions at very high energies will be given in a separate paper.…”

Section: Numerical Results and Comparison With Experimentsmentioning

confidence: 71%

“…The probability that the incident quark emits i branches during the passage of k cells is given by (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16) Hence the mean number of branches emitted from the incident quark per inelastic collision is given by (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) In our original problem, k corresponds to the number of quarks in A that are available for multiple recoil. An obvious bound is therefore given by …”

Section: Evaluation 0/ the Mean Tube Sizementioning

confidence: 99%

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Collective Quark Tubes in Hadron-Nucleus Collisions at High Energies

Takagi

1981

Progress of Theoretical Physics

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The big hadron model (collective tube model) for hadron production off nuclei is reformulated in terms of the constituent Quark picture. Predictive power of the model is considerably strengthened as the main free parameters of the original model are now calculable. The new version is applied to the mean multiplicities in hadron-nucleus collisions with satisfactory results. ) We have thereby decided to combine BHM with CQM to strengthen its predictive power. The new version of our model may better be called the collective Quark tube model (CQTM) rather than the big hadron model.The present paper is organized as follows. In § 2, main results of the original BHM are summarized for comparison with the new version. CQTM is defined and applied to mean charged hadron multiplicities in h-A collisions in § 3. Concluding remarks are given in § 4. Downloaded from ) *) We are aware of the fact that the contribution from the fragmentation regions can give a sizable effect to RhA at these energies.

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“…17) The latter was found successfuI. 9 ), 17) In the new version of BHM proposed in the present paper, choice of the latter at the quark level is a necessary consequence from the model.…”

Section: Numerical Results and Comparison With Experimentsmentioning

confidence: 71%

Section: Numerical Results and Comparison With Experimentsmentioning

confidence: 71%

Section: Evaluation 0/ the Mean Tube Sizementioning

confidence: 99%

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Collective Quark Tubes in Hadron-Nucleus Collisions at High Energies

Takagi

1981

Progress of Theoretical Physics

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“…We have thus shown that a single universal function can explain the mean charged multiplicities of all the relevant processes, i.e., lepton-hadron, hadron-hadron, hadron-nucleus and nucleus-nucleus collisions. Those points should be contrasted with the previous results of the big hadron model (BHM) 41 and the result of the collective tube model (CTM) 5 ) for the same central nucleus-nucleus collisions. In the previous BHM calculation,<) we assumed that the inelasticity=l, i.e., the energy available for particle production is fully converted into the mass of the excited hadronic matter.…”

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confidence: 66%

Collective Quark Tube Model for Nucleus-Nucleus Collisions at High Energies

Takagi

1980

Progress of Theoretical Physics

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The collective quark tube model (a new version of the big hadron model reformulated in terms of the constituent quark picture) is applied to nucleus-nucleus collisions at high energies. Production of hadrons is described by regarding a nucleus-nucleus collision as an incoherent sum of simultaneous quark tube-quark tube collisions. The mean tube size, the mean number of simultaneous quark tube-quark tube collisions and the absorption rate of quarks are evaluated by using a one-dimensional model. The calculated mean shower particle multiplicities are in good agreement with cosmic ray data.A general formalism for the central component of the mean shower particle multiplicities is given in § 2. The mean number of simultaneous q,-q, collisions and the mean size of the quark tubes are calculated in § 3. A contribution to shower particles from nuclear fragments is estimated in § 4_ Numerical results are presented and compared with data in § 5. Cone! uding remarks are given in § 6_ § 2. General formalism Consider central nucleus (JlP) -nucleus (A,) collisions at sufficiently high ener-by guest on April 10, 2015 http://ptp.oxfordjournals.org/ Downloaded from * 1 It may be worth while noting that the result of Table II gives the average over the 15 events of n, (observed) /n, (calculated) = 1. 035 and that of jn, (observed) -n, (calculated) 1/n, (calculated) =D=O. 238. The value of D is quite reasonable if the n,-distribution in central nucleusnucleus collisions obeys an approximate KNO scaling. by guest on April 10, 2015 http://ptp.oxfordjournals.org/ Downloaded from

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