Multiplicity distribution in proton-proton and proton-antiproton collisions at high energies

We have predicted the difference in inclusive cross sections on pseudorapidity in pp and pp interactions at √ s = 900 GeV. Their ratio R = dσ pp /dη /(dσ pp /dη) > 1 in the whole pseudorapidity range. On the basis of AGK theorem we show that the ratio of inclusive cross sections of pp and pp at √ s = 900 GeV in the region of low transverse momenta p ⊥ up to 2 GeVExperimental measurements by the ATLAS Coll. give value R 1.2 for interval |η| < 2.5. The difference in inclusive cross sections results from presence of additional subprocess in pp -hadrons production from decay of three quark strings, which is absent in pp scattering.

show abstract

“…We are based on the Low Constituents Number Model (LCNM) [6], [7], [8] which can be represented as follows.…”

Section: Low Constituents Number Modelmentioning

confidence: 99%

Inclusive cross sections of proton-proton and proton-antiproton scattering

Abramovsky¹,

Radchenko²

2011

Proceedings of the 40th International Symposium on Multiparticle Dynamics

View full text Add to dashboard Cite

show abstract

“…We emphasize that inelastic processes that contribute to pp and pp interactions are different and have nothing in common with picture of multiple pomeron showers (now they are called multiple parton interactions). The difference is connected to the fact that two "elementary" inelastic subprocesses contribute to inelastic production in pp scattering and three "elementary" inelastic subprocesses -in pp scattering [8] - [12].…”

Section: Low Constituents Number Modelmentioning

confidence: 99%

“…Based on these assumptions we supposed in [8,9] that interaction between hadrons is carried out by color exchange of only one gluon, and there are only one and two additional bremsstrahlung transverse gluons in initial state of colliding hadrons beside valence quarks. We formalize our treating by introducing diagrams for elementary subprocesses for pp and pp collisions, Fig.…”

Section: Elementary Inelastic Subprocesses In Pp and P P Interactionsmentioning

confidence: 99%

Possible difference between multiplicity distributions and inclusive spectra of secondary hadrons in proton-proton and proton-antiproton collisions at energy sqrt(s)=900 GeV

Abramovsky,

Radchenko

2009

Preprint

Self Cite

View full text Add to dashboard Cite

We consider QCD based model of hadrons interaction in which gluons density in wave function of initial state is low in rapidity space and real hadrons are produced by decay of color field strings. Hadrons production processes in pp and pp interactions differ on principle. There are three types of inelastic processes in pp collision. The first type is production of secondary hadrons shower from decay of gluon string. The second type is shower produced from decay of two quark strings and the third one -from decay of three quark strings. At the same time there are only two types of inelastic processes for pp collision, they are shower from gluon string and shower from two quark strings. Therefore multiplicity distributions and inclusive spectra of secondary hadrons are different in pp and pp interactions, and this difference may be observed at energy √ s = 900 GeV.

show abstract

“…Previously we have demonstrated the possibility of difference in multiplicity distributions in pp and pp scatterings [10]. It is almost impossible to prove this difference experimentally.…”

Section: Subprocesses Of Multiple Production In Pp and Ppmentioning

confidence: 99%

“…The values ofn (i) pp are calculated from multiplicity distribution P pp n , obtained in frame of LCNM [10]. Then we obtained inclusive pseudorapidity cross section for pp interaction at √ s = 900 GeV.…”

mentioning

confidence: 99%

Comparison of the data on proton-proton and proton-antiproton interactions at high energies on basis of the Low Constituents Number Model

Abramovsky¹

2013

Proceedings of XXI International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXI)

View full text Add to dashboard Cite

We argue that hadrons production is different in pp and pp interactions at high energies. There is process of hadrons production from three quark strings in pp which is absent in pp. This process grows as (ln √ s) 2 and becomes significant when energy of collision increases. Inclusive cross sections of pp interaction exceed inclusive cross sections of pp. The UA1 data on pp transverse momentum distribution are about 1.2 -1.3 times higher than the CMS, ATLAS and ALICE data on pp at energy √ s = 900 GeV. Question regarding existence of the Pomranchuk theorem demands further investigation on evidence of difference of multiple processes in pp and pp interactions.

show abstract

Multiplicity distribution in proton-proton and proton-antiproton collisions at high energies

Cited by 8 publications

References 18 publications

Inclusive cross sections of proton-proton and proton-antiproton scattering

Inclusive cross sections of proton-proton and proton-antiproton scattering

Possible difference between multiplicity distributions and inclusive spectra of secondary hadrons in proton-proton and proton-antiproton collisions at energy sqrt(s)=900 GeV

Comparison of the data on proton-proton and proton-antiproton interactions at high energies on basis of the Low Constituents Number Model

Contact Info

Product

Resources

About