Charged particle multiplicity distributions in pp collisions at ISR energies

Thomé, W.; Eggert, K.; Giboni, Karl; Lisken, H.; Darriulat, P.; Dittmann, P.; Holder, M.; McDonald, Kirk T.; Albrecht, H.; Modis, Theodore; Tittel, K.; Preissner, H.; Allen, P.; Derado, I.; Eckardt, V.; Gebauer, H. J.; Meinke, R.; Seyboth, P.; Uhlig, Selma

doi:10.1016/0550-3213(77)90122-5

Cited by 410 publications

(141 citation statements)

References 28 publications

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“…full "limiting fragmentation") implies scaling of both dN/dy ′ and dN/dx F . Figure 21 shows dN/dη ′ for p(p)+p collisions [155,172] and dN/d(y T -y jet ) for e + +e − collisions [173] (see Appendix B.2 for definitions). Lorentz boosts of pseudorapidity, η, are not as trivial as those of rapidity, but η ′ ≡ η − y beam (or η + y beam ) approximates y ′ .…”

Section: Longitudinal Dependence Of Particle Production: Elementary Smentioning

confidence: 99%

The PHOBOS perspective on discoveries at RHIC

et al. 2005

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This paper describes the conclusions that can be drawn from the data taken thus far with the PHOBOS detector at RHIC. In the most central Au+Au collisions at the highest beam energy, evidence is found for the formation of a very high energy density system whose description in terms of simple hadronic degrees of freedom is inappropriate. Furthermore, the constituents of this novel system are found to undergo a significant level of interaction. The properties of particle production at RHIC energies are shown to follow a number of simple scaling behaviors, some of which continue trends found at lower energies or in simpler systems. As a function of centrality, the total number of charged particles scales with the number of participating nucleons. When comparing Au+Au at different centralities, the dependence of the yield on the number of participants at higher p T (∼4 GeV/c) is very similar to that at low transverse momentum. The measured values of charged particle pseudorapidity density and elliptic flow were found to be independent of energy over a broad range of pseudorapidities when effectively viewed in the rest frame of one of the colliding nuclei, a property we describe as "extended longitudinal scaling". Finally, the centrality and energy dependences of several observables were found to factorize to a surprising degree.

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Section: Longitudinal Dependence Of Particle Production: Elementary Smentioning

confidence: 99%

The PHOBOS perspective on discoveries at RHIC

et al. 2005

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“…and include estimated errors in the determination of N part . The open squares at N part =2 correspond to the measured multiplicity for p + p inelastic collisions from the UA5 collaboration (for 200 GeV) and interpolated multiplicity for p + p collisions from ISR measurements (for 19.6 GeV) [8,9]. Both reference points have been chosen to match our pseudorapidity coverage of |η| < 1.…”

Section: Resultsmentioning

confidence: 99%

Measuring mid-rapidity multiplicity in PHOBOS

Back¹,

Baker²,

Ballintijn³

et al. 2005

J. Phys.: Conf. Ser.

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Abstract. Several techniques have been developed by PHOBOS for measuring the multiplicity of charged particles produced in Au + Au collisions. We will discuss one of these techniques (the 'Tracklet' method) which utilizes two-hit tracks which intersect at the reconstructed collision vertex position. The physics that comes from these measurements can give valuable insight into the underlying mechanisms of particle production over a center of mass energy range of √ sNN = 19.6 GeV to the maximum RHIC energy of √ sNN = 200 GeV.

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“…2 of ref. [29]. The differences in the multiplicities observed in the experiment and the multiplicities in the calculations are, however, not corrected.…”

Section: Differential Cross Sectionsmentioning

confidence: 99%

“…Normalized charged particle densities in various intervals of the multiplicity n indicated on the right ordinate. Dots are data [29], histograms represent ROC results. Data and calculations are corrected for acceptance.…”

Section: Multiplicitiesmentioning

confidence: 99%

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Soft hadron production in pp interactions up to ISR energies

Müller

2001

Eur. Phys. J. C

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Abstract. Soft hadron production is described as a two-step process, where the interaction of the partonic constituents of the colliding hadrons leads to the production of intermediate subsystems (fireballs), which decay subsequently into hadrons. The weights of the various final states are derived from the corresponding phase-space factors modified by empirical transition elements. The results compare well with data at energies between particle production thresholds and ISR energies. Special emphasis is put on correlation data, which offer the opportunity to shed some light on the question whether particle production proceeds via fireballs or strings.

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Charged particle multiplicity distributions in pp collisions at ISR energies

Cited by 410 publications

References 28 publications

The PHOBOS perspective on discoveries at RHIC

The PHOBOS perspective on discoveries at RHIC

Measuring mid-rapidity multiplicity in PHOBOS

Soft hadron production in pp interactions up to ISR energies

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