Signals of new physics in global event properties in pp collisions in the TeV energy domain: rapidity intervals

Giovannini, Alberto; Ugoccioni, R.

doi:10.1140/epjc/s2004-01966-2

Cited by 7 publications

(7 citation statements)

References 10 publications

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“…A sign of the component is seen also in the minimum biased data measured by the LHCb Collaboration in the forward region. The analysis of the LHC data on MD excludes interpretation of this Poisson-like component in terms of hard processes which could lead to 'elbow-like' behavior at the tail of the distributions considered in [27].…”

Section: Discussionmentioning

confidence: 96%

A three-component description of multiplicity distributions inppcollisions at the LHC

Zborovský¹

2013

J. Phys. G: Nucl. Part. Phys.

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Abstract. A possible signal of new phenomena emerging in the global characteristics of multiparticle production in hadron interactions at TeV energies is studied. The multiplicity distributions of charged particles measured in proton-proton collisions at the Large Hadron Collider at CERN are analyzed in the phenomenological framework of the weighted superposition of three negative binomial distribution functions. The examination of the experimental data indicates the existence of a narrow peak at low multiplicities which can be described by a separate component in the total distribution. The multiplicity characteristics of the third component reveal approximate energy and pseudorapidity invariance, of which a physical explanation represents a challenging problem in high energy multiple particle production.

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Section: Discussionmentioning

confidence: 96%

A three-component description of multiplicity distributions inppcollisions at the LHC

Zborovský¹

2013

J. Phys. G: Nucl. Part. Phys.

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“…The extrapolation of the weighted superposition of the two defined classes of events from the TeV to the multi-TeV energy domain and a study of the properties of particle clans raised intriguing questions concerning the onset of a third class of events in the tail of the distribution, both in the full phase space [6] and in the limited windows in pseudorapidity [7]. Later study [8] of the MDs measured at √ s = 7 TeV indicated the existence of the third multiplicity component at low n. In this region, near the maximum of P(n), there is a suitable tool, the method of combinants [9], to be used in searching for new phenomena in the behavior of the MDs.…”

Section: Introductionmentioning

confidence: 99%

Three-component multiplicity distribution, oscillation of combinants and properties of clans in pp collisions at the LHC

Zborovský

2018

Eur. Phys. J. C

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Multiplicity distributions of charged particles measured by the ATLAS Collaboration in proton-proton collisions at √ s = 8 and 13 TeV are analyzed in the framework of a weighted superposition of three negative binomial distribution functions. The examination of the experimental data confirms the existence of a narrow peak at low multiplicities found earlier at √ s = 0.9 and 7 TeV. The peak is described by the third separate component of the total distribution. The energy dependence of the multiplicity characteristics of the three-component scenario is studied. It is demonstrated that the third multiplicity component might be responsible for oscillations of combinants observed lately in the analysis of the multiplicity distributions measured in proton-proton collisions at the LHC. Some consequences of the three-component description of the data for the clan parameters are analyzed.

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“…This interpretation is also supported by more sophisticated theoretical calculations, in a scenario in which a time-dependent pulse for the initial strength of the color field is considered [95,96]. The large enhancement of the baryon-to-meson ratios demonstrates that SCF could play an important role in multiparticle production in pp collisions at LHC energies and that high energy density fluctuations can reach very high densities, potentially comparable to those reached in central Au + Au collisions at RHIC energies [97].…”

Section: A Baryon-to-meson Ratiomentioning

confidence: 81%

Strong longitudinal color-field effects inppcollisions at energies available at the CERN Large Hadron Collider

Pop¹,

Gyulassy²,

Barrette³

et al. 2011

Phys. Rev. C

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We study the effect of strong longitudinal color fields (SCF) in p+p reactions up to Large Hadron Collider energies in the framework of the HIJING/BB v2.0 model that combines (collinear factorized) pQCD multiple minijet production with soft longitudinal string excitation and hadronization.The default vacuum string tension, κ 0 = 1 GeV/fm, is replaced by an effective energy dependent string tension, κ(s) = κ 0 (s/s 0 ) 0.06 that increases monotonically with center-of-mass energy. The exponent λ = 0.06 is found sufficient to reproduce well the energy dependence of multiparticle observables in RHIC, Tevatron, as well as recent LHC data. This exponent is half of that predicted by the Color Glass Saturation (CGC) model, λ CGC = 0.115, where gluon fusion multiparticle production mechanisms are assumed. In HIJING/BB v2.0, the rapid growth of dN ch /dη with energy is due to the interplay of copious minijet production with increasing of strong color field (SCF) contributions. The large (strange)baryon-to-meson ratios measured at Tevatron energies are well described. A significant enhancement of these ratios is predicted up to the highest LHC energy (14 TeV). The effect of JJ loops and SCF on baryon-anti-baryon asymmetry, and its relation to baryon number transport, is also discussed.PACS numbers: 12.38. Mh, 24.85.+p, 25.40Ve, 1

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Signals of new physics in global event properties in pp collisions in the TeV energy domain: rapidity intervals

Cited by 7 publications

References 10 publications

A three-component description of multiplicity distributions inppcollisions at the LHC

A three-component description of multiplicity distributions inppcollisions at the LHC

Three-component multiplicity distribution, oscillation of combinants and properties of clans in pp collisions at the LHC

Strong longitudinal color-field effects inppcollisions at energies available at the CERN Large Hadron Collider

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