The Heavy Photon Search (HPS) Software Environment

Conference · Mon Nov 16 00:00:00 EST 2020 · EPJ Web of Conferences (Online)

DOI:https://doi.org/10.1051/epjconf/202024502018· OSTI ID:1737640

Graf, Norman ^[1]

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1. SLAC National Accelerator Lab., Menlo Park, CA (United States)

The Heavy Photon Search (HPS) is an experiment at the Thomas Jefferson National Accelerator Facility (JLab) designed to search for a hidden sector photon (A’) in fixed-target electro-production. It uses a silicon microstrip tracking and vertexing detector placed inside a dipole magnet to measure charged particle trajectories and a fast lead-tungstate crystal calorimeter located just downstream of the magnet to provide a trigger and to identify electromagnetic showers. The HPS experiment uses both invariant mass and secondary vertex signatures to search for the A’. The experimental collaboration is small and quite heterogeneous: it is composed of members of the nuclear physics as well as particle physics communities, from universities and national labs from around the US and Europe. Enabling such a disparate group to concentrate on the physics aspects of the experiment required that the software be easy to install and use, and having such limited manpower meant that existing solutions had to be exploited. HPS has successfully completed two engineering runs and completed its first physics run in the summer of 2019. We begin with an overview of the physics goals of the experiment followed by a short description of the detector design. We then describe the software tools used to design the detector layout and simulate the expected detector performance. Event reconstruction involving track, cluster and vertex finding and fitting for both simulated and real data was, to first order, adopted from existing software originally developed for Linear Collider studies. Bringing it all together into a cohesive whole involved the use of multiple software solutions with common interfaces.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Contributing Organization: HPS Collaboration
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1737640
• Report Number(s): JLAB-PHY-20-3293; DOE/OR/23177-5106
• Journal Information: EPJ Web of Conferences (Online), Vol. 245; Conference: CHEP 2019, 4-8 November 2019. Adelaide, Australia; ISSN 2100-014X
• Publisher: EDP Sciences
• Country of Publication: United States
• Language: English