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On saturation of charged hadron production in pp collisions at LHC

Result description

First results on charged hadron transverse momentum spectra in pp collisions obtained by the CMS Collaboration at the LHC are analyzed in the z-scaling approach. These LHC data confirm z-scaling. The saturation regime of the scaling function psi(z) observed in pp and (p) over barp interactions at lower energies root s = 19-1960 GeV is verified. The saturation of psi(z) for charged hadrons is found down to a value of z similar or equal to 0.05 at the highest energy root s = 2360 GeV currently reached bythe colliders. A microscopic scenario of hadron production is discussed in connection with the search for new signatures of phase transitions in hadron matter. Constituent energy loss and its dependences on the transverse momentum and collision energy are estimated. We suggest that the beam energy scan program in the saturation region at the LHC could be of interest.

Keywords

LARGE TRANSVERSE-MOMENTUMHIGH-ENERGY COLLISIONSSCALING LAWS

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    On saturation of charged hadron production in pp collisions at LHC

  • Original language description

    First results on charged hadron transverse momentum spectra in pp collisions obtained by the CMS Collaboration at the LHC are analyzed in the z-scaling approach. These LHC data confirm z-scaling. The saturation regime of the scaling function psi(z) observed in pp and (p) over barp interactions at lower energies root s = 19-1960 GeV is verified. The saturation of psi(z) for charged hadrons is found down to a value of z similar or equal to 0.05 at the highest energy root s = 2360 GeV currently reached bythe colliders. A microscopic scenario of hadron production is discussed in connection with the search for new signatures of phase transitions in hadron matter. Constituent energy loss and its dependences on the transverse momentum and collision energy are estimated. We suggest that the beam energy scan program in the saturation region at the LHC could be of interest.

  • Czech name

    —

  • Czech description

    —

Classification

  • Type

    Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BE - Theoretical physics

  • OECD FORD branch

    —

Result continuities

Others

  • Publication year

    2010

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Physics G-Nuclear and Particle Physics

  • ISSN

    0954-3899

  • e-ISSN

    —

  • Volume of the periodical

    37

  • Issue of the periodical within the volume

    8

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    10

  • Pages from-to

    —

  • UT code for WoS article

    000279712600010

  • EID of the result in the Scopus database

    —

Result type

Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

Jx

CEP

BE - Theoretical physics

Year of implementation

2010

Similar results(10)

First Test of z-Scaling in Hadron and Jet Production in pp Collisions at LHCTop-Quark p(T)-Spectra at LHC and Flavor Independence of z-ScalingTop quark p(T)-spectra at tevatron and LHC: Flavor independence of z-Scaling