Nuclear and Particle Physics

Time for Hyperons - Towards Reconstruction of Long-Lived Particles with Free-Streaming Data at PANDA at FAIR

by Jenny Regina (Uppsala University)

→ Europe/Stockholm
621 0173 5359 (Zoom)

621 0173 5359

Zoom

Time: May 7, 2020 10:30 AM Stockholm Join Zoom Meeting https://uu-se.zoom.us/j/62101735359 Meeting ID: 621 0173 5359 One tap mobile +46850500828,,62101735359# Sweden +46850500829,,62101735359# Sweden Dial by your location +46 8 5050 0828 Sweden +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +45 32 71 31 57 Denmark +45 32 72 80 10 Denmark +45 32 72 80 11 Denmark +45 89 88 37 88 Denmark +45 32 70 12 06 Denmark +47 7349 4877 Norway +47 2396 0588 Norway +49 30 5679 5800 Germany +49 695 050 2596 Germany +49 69 7104 9922 Germany +33 1 7037 9729 France +33 1 7095 0103 France +33 1 7095 0350 France +33 7 5678 4048 France +33 1 7037 2246 France +44 208 080 6591 United Kingdom +44 208 080 6592 United Kingdom +44 330 088 5830 United Kingdom +44 131 460 1196 United Kingdom +44 203 481 5237 United Kingdom +44 203 481 5240 United Kingdom +1 301 715 8592 US +1 312 626 6799 US (Chicago) +1 346 248 7799 US (Houston) +1 408 652 8184 US (San Jose) +1 646 876 9923 US (New York) +1 669 900 6833 US (San Jose) +1 253 215 8782 US Meeting ID: 621 0173 5359 Find your local number: https://uu-se.zoom.us/u/cNamzXf Join by SIP 62101735359@109.105.112.236 62101735359@109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 621 0173 5359 Join by Skype for Business https://uu-se.zoom.us/skype/62101735359
Description

Half-time PhD seminar

This will be a virtual seminar, and will be hosted in Zoom

Direct link: https://uu-se.zoom.us/j/62101735359

Meeting ID: 621 0173 5359

The PANDA (anti-Proton ANnihilation at DArmstadt) experiment at the future FAIR (Facility for Anti-proton and Ion Research) offers unique possibilities for performing hyperon physics. The almost full 4π coverage of the detector will enable the reconstruction of both hyperon and antihyperon which will be created together in proton-antiproton collisions. Hyperons are generally identified through their decay products and due to their relatively long-lived nature, the displaced decay vertices of the hyperons impose a particular challenge on the track reconstruction and event building.

Event rates up to 20 MHz and continuous detector readout make the event filtering at PANDA challenging. In addition, no hardware-based event selection will be possible due to the similarities between signal and background. PANDA will therefore utilize a fully software-based event filtering. Track reconstruction will be crucial for the online filtering where it will be used together with the event building.

In this talk I will address some hyperon channels of interest for PANDA and discuss my investigations of detector signatures from the decay channels Λ→pπ-, Ξ-→Λπ-→pπ-π- and Ω-→ΛK-→ K-pπ- where the hypeons have been produced in particle-antiparticle pairs. I will also talk about my development for tracking on free streaming data. In addition, I will discuss candidates for online track reconstruction algorithms for free streaming data based on a 4D Cellular Automaton clustering procedure and Riemann fitting. The Cellular Automaton procedure does not assume the interaction point as a constraint which makes it suitable for tracking hyperon decay products. The track reconstruction quality assurance procedure and the results from the tracking at different event rates are also presented.

HalfTimeSeminar_Jenny_Regina.pdf