13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Production of electrons from beauty-hadron decays in Pb-Pb collisions at 5.02 TeV with ALICE

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

First floor and third floor

Palazzo del Casinò

Poster Open heavy flavour Poster Session

Speakers

Camila De Conti (Universidade de Sao Paulo (BR)) Erin Frances Gauger (University of Texas at Austin (US))

Description

Heavy-flavour quarks (charm and beauty) are an important tool used to probe the Quark Gluon Plasma (QGP), the colour-deconfined medium created in ultrarelativistic heavy-ion collisions. They are created in the first stages of the collision, mainly via hard parton scattering, and they experience the whole evolution of the medium. The study of the energy loss of heavy-flavour quarks is of particular interest to understand the mass dependence of energy loss in the QGP.
We will show the status of the measurement of electrons from beauty hadron decays in Pb-Pb collisions at 5.02 TeV using the ALICE detector. Electrons with low transverse momentum (1 < $p_{\rm T}$ < 6 GeV/c) are identified using the Time Projection Chamber (TPC) and Time-Of-Flight detectors, while high-momentum electrons (6 < $p_{\rm T}$ < 20 GeV/c) are identified using the TPC and the Electromagnetic Calorimeter. Beauty decay electrons are extracted by performing fits to the impact parameter distribution using templates of different electron sources obtained from Monte Carlo simulations. At low $p_{\rm T}$, templates of impact parameter distribution for electrons from gamma, Dalitz, charm and beauty decays are used to obtain the relative fraction of each source. At high $p_{\rm T}$, the invariant mass of electron-positron pairs is used to identify electrons from gamma conversions and Dalitz decays, and only the templates for charm and beauty decay electrons are used in the impact parameter fit.

Collaboration ALICE
Content type Experiment
Centralised submission by Collaboration Presenter name already specified

Primary authors

Camila De Conti (Universidade de Sao Paulo (BR)) Erin Frances Gauger (University of Texas at Austin (US))

Presentation Materials

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