The role of double parton collisions in soft hadron interactions

Alexopoulos, T.; Anderson, E. W.; Biswas, N. N.; Bujak, A.; Carmony, D.D.; Erwin, A. R.; Gutay, L.; Hirsch, A.; Hojvat, C.; Kenney, V. P.; Lindsey, Clark S.; LoSecco, J. M.; Matinyan, S.G.; Morgan, N.; Oh, S. H.; Porile, N.; Scharenberg, R. P.; Stringfellow, B.; Thompson, M.; Turkot, F.; Walker, W. D.; Wang, C.H.

doi:10.1016/s0370-2693(98)00921-6

Cited by 62 publications

(45 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…While the SppS had paved the way for a new view on hadronic collisions, the Tevatron rather contributed to cement this picture. KNO distributions kept on getting broader [73], forward-backward correlations got stronger [74], and p ⊥ (n ch ) showed the same rising trend [75,76], to give some examples. The Tevatron emphasis was on hard physics, however, and it took many years to go beyond the SppS MB and UE studies.…”

Section: Interludementioning

confidence: 91%

The Development of MPI Modeling in Pythia

Sjöstrand¹

2018

Multiple Parton Interactions at the LHC

View full text Add to dashboard Cite

Many of the basic ideas in multiparton interaction (MPI) phenomenology were first developed in the context of the Pythia event generator, and MPIs have been central in its modelling of both minimum-bias and underlying-event physics in one unified framework. This chapter traces the evolution towards an increasingly sophisticated description of MPIs in Pythia, including topics such as the ordering of MPIs, the regularization of the divergent QCD cross section, the impact-parameter picture, colour reconnection, multiparton PDFs and beam remnants, interleaved and intertwined evolution, and diffraction.

show abstract

Section: Interludementioning

confidence: 91%

The Development of MPI Modeling in Pythia

Sjöstrand¹

2018

Multiple Parton Interactions at the LHC

View full text Add to dashboard Cite

show abstract

“…The appearance of substructures in multiplicity distributions attributed to the occurrence of several sources in the process of particle production [81][82][83][84], can be parameterized by fitting the data with two NBDs. Indeed, a much better fit to the data is obtained by using a weighted sum of two NBD functions…”

Section: Parameterization Of Multiplicity Distributions With Nbdsmentioning

confidence: 99%

Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2017

Eur. Phys. J. C

View full text Add to dashboard Cite

A detailed study of pseudorapidity densities and multiplicity distributions of primary charged particles produced in proton-proton collisions, at √ s = 0.9, 2.36, 2.76, 7 and 8 TeV, in the pseudorapidity range |η| < 2, was carried out using the ALICE detector. Measurements were obtained for three event classes: inelastic, non-single diffractive and events with at least one charged particle in the pseudorapidity interval |η| < 1. The use of an improved track-counting algorithm combined with ALICE's measurements of diffractive processes allows a higher precision compared to our previous publications. A KNO scaling study was performed in the pseudorapidity intervals |η| < 0.5, 1.0 and 1.5. The data are compared to other experimental results and to models as implemented in Monte Carlo event generators PHOJET and recent tunes of PYTHIA6, PYTHIA8 and EPOS.

show abstract

“…(1989);Rimondi (1993);Alner et al (1985);Alexopoulos et al (1998);Albajar et al (1990);Arnison et al (1983);Alner et al (1984); Abe et al(1990);Whitmore (1974);Wang (1991). The review paper Fiete Grosse-Oetringhaus & Reygers (2010) and analysis inAlbini et al (1976) find a function of the form a + bs W provides a good description of the multiplicity data, where s is the centre-of-mass interaction energy (in GeV) and the parameters take values of a = 0.0, b = 3.102 and W = 0.178 (Fiete Grosse-Oetringhaus & Reygers 2010).…”

mentioning

confidence: 99%

Interactions between ultra-high-energy particles and protogalactic environments

Owen

Jacobsen

et al. 2018

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We investigate the interactions of energetic hadronic particles (cosmic ray protons) with photons and baryons in protogalactic environments, where the target photons are supplied by the first generations of stars to form in the galaxy and the cosmological microwave background, while the target baryons are the interstellar and circumgalactic medium. We show that pair-production and photo-pion processes are the dominant interactions at particle energies above 10 19 eV, while pp-interaction pion-production dominates at the lower energies in line with expectations from, for example γ-ray observations of star-forming galaxies and dense regions of our own galaxy's interstellar medium. We calculate the path lengths for the interaction channels and determine the corresponding rates of energy deposition. We have found that protogalactic magnetic fields and their evolution can significantly affect the energy transport and energy deposition processes of cosmic rays. Within a Myr after the onset of star-formation the magnetic field in a protogalaxy could attain a strength sufficient to confine all but the highest energy particles within the galaxy. This enhances the cosmic ray driven self-heating of the protogalaxy to a rate of around 10 −24 erg cm −3 s −1 for a galaxy with strong star-forming activity that yields 1 core collapse SN event per year. This heating power exceeds even that due to radiative emission from the protogalaxy's stellar populations. However, in a short window before the protogalaxy is fully magnetised, energetic particles could stream across the galaxy freely, delivering energy into the circumgalactic and intergalactic medium.

show abstract

The role of double parton collisions in soft hadron interactions

Cited by 62 publications

References 21 publications

The Development of MPI Modeling in Pythia

The Development of MPI Modeling in Pythia

Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV

Interactions between ultra-high-energy particles and protogalactic environments

Contact Info

Product

Resources

About