Application of Straw Tube Detectors to Hyperon Studies
![Application of Straw Tube Detectors to Hyperon Studies Sedigheh Jowzaee Symposium on Applied Nuclear Application of Straw Tube Detectors to Hyperon Studies Sedigheh Jowzaee Symposium on Applied Nuclear](https://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-1.jpg)
Application of Straw Tube Detectors to Hyperon Studies Sedigheh Jowzaee Symposium on Applied Nuclear Physics and Innovative Technologies 24 -27 Sep. 2014, Krakow, Poland
![“To know that we know what we know, and to know that we do “To know that we know what we know, and to know that we do](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-2.jpg)
“To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge” Nicolaus Copernicus
![Structure of Matter Three generation of matter (fermions) I • Current knowledge based on Structure of Matter Three generation of matter (fermions) I • Current knowledge based on](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-3.jpg)
Structure of Matter Three generation of matter (fermions) I • Current knowledge based on Standard Model of particle physics Ø Matter • Quarks • Leptons Ø Fundamental forces • Gauge bosons mass charge Spin name Stable matter II III
![Hyperons • All observed color neutral hadrons ( (baryons), • Baryons lightest three quark Hyperons • All observed color neutral hadrons ( (baryons), • Baryons lightest three quark](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-4.jpg)
Hyperons • All observed color neutral hadrons ( (baryons), • Baryons lightest three quark flavors (u, d, s) Decuplet baryons • Hyperons: baryons contain s-quarks (mesons)) Octet baryons
![Straw Tube Tracker (STT) • The straw tube is a proportional counter, gas-filled cylindrical Straw Tube Tracker (STT) • The straw tube is a proportional counter, gas-filled cylindrical](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-5.jpg)
Straw Tube Tracker (STT) • The straw tube is a proportional counter, gas-filled cylindrical tube as a cathode and a thin wire as an anode stretched along the tube axis as an anode reconstruction of particle trajectory measure: t. Drift r. Dis
![STT in COSY-TOF Detector • Hyperon study in pp • • • p. K+Λ STT in COSY-TOF Detector • Hyperon study in pp • • • p. K+Λ](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-6.jpg)
STT in COSY-TOF Detector • Hyperon study in pp • • • p. K+Λ reaction Strange quark does not exist in nucleon as a constituent How they create and how they interact COSY-TOF detector is Excellent for strangeness study p • Upgraded with STT • High statistics measurement • • • Beam momentum= 2. 95 Ge. V/c Polarization (87. 5 ± 2. 0)% Reconstruction of events with STT • • 140 μm spatial resolution 130000 reconstructed events 20 % reconstruction efficiency with MC Invariant mass resolution 1 Me. V/c 2 p Λ πK+
![COSY-TOF STT Calibration • Reconstruction of p. K+Λ events with STT • Calibration steps COSY-TOF STT Calibration • Reconstruction of p. K+Λ events with STT • Calibration steps](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-7.jpg)
COSY-TOF STT Calibration • Reconstruction of p. K+Λ events with STT • Calibration steps precise calibration • TDC correction • Multiple hits removal , Signal width cut, Electronics offset correction • Estimation of correlation between drift time and radius • Straw double layers geometrical position correction • Spatial resolution determination Published: S. Jowzaee, Acta physica polonica B, Vol. 6, (2013).
![p. K+Λ Dalitz Plot and Projections • The experiment covers the complete kinematic phase p. K+Λ Dalitz Plot and Projections • The experiment covers the complete kinematic phase](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-8.jpg)
p. K+Λ Dalitz Plot and Projections • The experiment covers the complete kinematic phase space • Interference between physical effects in KΛ and pΛ subsystems • Nucleon excited states (N*-resonances) • NΛ interaction (pΛ-FSI ) • NΣ-pΛ coupled channel effect (NΣ cusp) Prepare publication
![STT in PANDA Detector • PANDA and Charmonium study • Charm quark is heavier STT in PANDA Detector • PANDA and Charmonium study • Charm quark is heavier](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-9.jpg)
STT in PANDA Detector • PANDA and Charmonium study • Charm quark is heavier than strange quark • higher beam momentum, pp reaction • STT is a main tracker in the PANDA detector • STT performance simulation for PID with TOT and charge methods Published: S. Jowzaee, et al. , Nuclear Instruments and methods in physics research A 718, (2013).
![Summary • Modular straw tube trackers are good tools for tracking and particles identification Summary • Modular straw tube trackers are good tools for tracking and particles identification](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-10.jpg)
Summary • Modular straw tube trackers are good tools for tracking and particles identification in large scale experiments like the COSY-TOF and the PANDA • COSY-TOF upgraded with STT is an ideal detector to study Λ-hyperon in the pp p. K+Λ reaction • An improved invariant mass distribution and reconstruction efficiency were obtained due to the straw tube tracker performance
![INTERNATIONAL PHD PROJECTS IN APPLIED NUCLEAR PHYSICS AND INNOVATIVE TECHNOLOGIES This project is supported INTERNATIONAL PHD PROJECTS IN APPLIED NUCLEAR PHYSICS AND INNOVATIVE TECHNOLOGIES This project is supported](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-11.jpg)
INTERNATIONAL PHD PROJECTS IN APPLIED NUCLEAR PHYSICS AND INNOVATIVE TECHNOLOGIES This project is supported by the Foundation for Polish Science – MPD program, co-financed by the European Union within the European Regional Development Fund Thank you
![p. K+Λ Dalitz Plot Analysis • Dividing the Dalitz plot into three equal phase p. K+Λ Dalitz Plot Analysis • Dividing the Dalitz plot into three equal phase](http://slidetodoc.com/presentation_image_h2/79a0b18fdc008785f7419b6f7bfe4568/image-12.jpg)
p. K+Λ Dalitz Plot Analysis • Dividing the Dalitz plot into three equal phase space volume sections by helicity angle cosθp. K in pΛ rest frame • Cusp effect is stronger at lower parts of the Dalitz plot • FSI effect seems to be same in three parts in the low enough range of the mpΛ Prepare publication
- Slides: 12