Simulated jet samples for quark flavour identification studies

<p>The purpose of these simulation samples is to let computing experts test innovative machine learning algorithms in the LHCb environment.</p> <p>In particular quark identification tasks such as b versus b-bar or b versus c can be studied.</p> <p>Quarks are produced in proton-proton collisions but cannot exist in the isolated state, and they immediately fragmentate in spray of particles called hadronic jets.</p> <p>For this reason the quark properties have to be determined from the jet detected by the LHCb experiment.</p> <p>Different simulation samples where a pair of jets generated by b b-bar, c c-bar or light flavour (u, d, s or gluons) are detected by LHCb are available.

Samples of Z bosons decaying to two b-quarks are also available.</p> <p>The samples differ also for the transverse momentum exchanged in the proton-proton collision, as it is specified in the file name ([10,15] GeV/c, [15,20] GeV/c, [20,50] GeV/c and > 50 GeV/c).</p> <p>The samples can be opened with the ROOT software and they contain tuples with measured observables related to the jets.</p> <p>Labels Jet0_ and Jet1_ refer to the two different jets in the event.</p> <p>Labels Jet0_Daughters_ and Jet1_Daughters_ are associated to arrays with observables related to particles that form the jets.</p> <p>In particular observables like the measured momentum, pseudorapidity, invariant mass and the output of the particle identification system are stored.</p>