sPHENIX MAPS tracker discussion

[Yasser Corrales Morales <ycorrale AT cern.ch>]

Dear All,

Please find an abstract for the Heavy Flavor Physics performance with MVTX detector poster to be presented at QM conference. Comments and suggestions are wellcome.

YCM.

Title: Heavy Flavor Physics with MVTX Detectors in sPHENIX

    Abstract: The sPHENIX experiment is scheduled to start collecting data in May 2023 at the Relativistic Heavy Ion Collider (RHIC) at BNL, presenting a unique opportunity to study QGP properties using jets and heavy quarks with unprecedented precision. The successful construction and deployment of the three-layer Monolithic-Active-Pixel-Sensor (MAPS) based VerTeX detector (MVTX) for the sPHENIX experiment in 2023 enables precise measurements of heavy bottom quark jets (b-jets) and B-hadrons produced in high-energy heavy ion Au+Au collisions at RHIC. These measurements offer a unique set of observables due to the large bottom quark mass and will span an unexplored kinematic regime, particularly at low pT where mass-dependence effects in QGP are expected to be significant, while the underlying backgrounds are also expected to be high.
    The MVTX detectors serve as the innermost tracking system of the sPHENIX experiment, covering 2.5-4.0 cm radially and a pseudorapidity range of |η| < 2. With its very fine 27 µm x 29 µm pixels, the MVTX detector can identify heavy hadron decay secondary vertices and heavy flavor jets in heavy ion collisions with high efficiency and purity. In this presentation, we will highlight the MVTX detector's performance using the first-year commissioning data and its impact on future heavy flavor measurements, including B-hadrons and b-jets in heavy ion collisions.