3–7 Apr 2017
University of Birmingham
Europe/London timezone

Test of proton intrinsic charm in $\gamma (Z) + c(b)$ production at LHC (REMOTE)

5 Apr 2017, 12:40
20m
Large Lecture Theatre, Poynting Building

Large Lecture Theatre, Poynting Building

WG5) Physics with Heavy Flavours WG1 and WG5 joint session

Speaker

Prof. Gennady Lykasov (Joint Institute for Nuclear Reactions)

Description

We consider an observable very sensitive to the non-zero intrinsic charm (IC) contribution to the proton density.
It is the ratio between the differential cross sections of the photon or $Z$-boson and $c$-jet
production in the $pp$ collision, $\gamma(Z) + c$, and the $\gamma(Z)$ and the $b$-jet production.
It is shown that this ratio can be approximately flat or increasing at large $\gamma(Z)$ transverse momenta $p_T$
and their pseudo-rapidities $1.5 < \eta < 2.4$ if the IC contribution is taken into account.
On the contrary, in the absence of the IC this ratio decreases as $p_T$ grows.
We also present the ratios of the cross sections integrated over $p_T$ as a function of the IC probability $w$.
It is shown that these ratios are mostly independent on the theoretical uncertainties, and such predictions could
therefore be much more promising for the search for the intrinsic charm signal at the LHC compared to the predictions
for $p_T$-spectra, which significantly depend on these uncertainties.

Authors

Prof. Gennady Lykasov (Joint Institute for Nuclear Reactions) Dr Artem Lipatov ( Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119992, Moscow Russia)

Presentation materials