24–29 Aug 2014
Hamburg University
Europe/Berlin timezone

Connection between soft physics at LHC and low-x physics at HERA

Not scheduled
Main Building (Hamburg University)

Main Building

Hamburg University

Edmund-Siemers-Allee 1 Hamburg <a href="https://www.google.com/maps/place/Edmund-Siemers-Allee+1/@53.56303,9.98782,17z/data=!3m1!4b1!4m2!3m1!1s0x47b18f3cbed7b4f1:0xffb72ee7b0f3c774">PANIC14 venue at University Hamburg</a>
Poster 6) Standard model physics at the TeV scale

Speakers

Prof. Gennady Lykasov (JINR. Dubna, Russia)Dr Nikolay Zotov (Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991, Moscow, Russia)

Description

We study the connection between the inclusive spectra of hadrons produced in $pp$ collision at LHC energies at low transverse momenta and the unintegrated gluon distribution (u.g.d.) at small $x$ at the starting scale $Q_0^2$. This gluon distribution [1] is obtained from the best description of the LHC data in the soft kinematical region and it does not contradict to the asymptotic behaviour of the solution of the BFKL equation at large transverse momenta of gluons. To extend the u.g.d. to higher $Q^2$ we use the Catani-Ciafoloni-Fiorani-Marchesini (CCFM) evolution equation. It is shown that the evoluted u.g.d. is very sensitive to the starting u.g.d. especially at low transverse momenta $\mid k_T\mid<$ 1 GeV$/$c. The inclusion of the CCFM evolution results in a large increase of the u.g.d. magnitude at low $x$ and large $\mid k_T\mid$ above a few GeV$/$c. The application of the obtained u.g.d to the analysis of the $ep$ deep inelastic scattering allows us to get the results, which describe reasonably well the H1 and ZEUS data on the longitudinal proton structure function $F_L(x,Q^2)$ [2]. So, the connection between the soft processes at LHC and small $x$ physics at HERA has been confirmed and extended to a wide kinematical region. The self-consistent satisfactory description of both the LHC and HERA data allows us to correct the value of saturation scale for the gluon density. References [1] A.A.Grinyuk, A.V.Lipatov, G.I.Lykasov, N.P.Zotov, Phys.Rev. D87 (2013) 074017. [2] A.V.Lipatov, G.I.Lykasov, N.P.Zotov, Phys.Rev. D89 (2014) 014001.

Primary author

Prof. Gennady Lykasov (JINR. Dubna, Russia)

Co-authors

Mr Andrey Grinyuk (JINR. Dubna, Russia) Dr Artem Lipatov (Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991, Moscow, Russia) Dr Nikolay Zotov (Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991, Moscow, Russia)

Presentation materials

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