Particle Spin Group - School of Mathematics

Welcome to the Particle Spin Group

We are a research group working on spin and polarisation phenomena in Theoretical Particle Physics and Quantum Field Theory, in the School of Mathematics, Trinity College Dublin. Currently we work in collaboration with the Polarised Antiproton eXperiments (PAX) project in GSI Darmstadt, Germany. Dr. Buttimore also works with the RHIC-Spin collaboration in Brookhaven National Laboratory, New York.

Members of the Group

Dr. Nigel Buttimore	Personal Homepage
Donie O Brien	Personal Homepage
Elise Jennings	Personal Homepage

Our Research

We are deriving fully relativistic differential cross section formulae for polarisation transfer in antiproton-electron and antiproton-proton scattering, in both the elastic and electron-positron production cases. Also electromagnetic helicity amplitudes and spin observables have been derived for various reactions.

Recent Publications

1) A study of polarization buildup by spin filtering.
By D. S. O'Brien (Trinity College Dublin).
Proceedings of the Polarized Antiproton Beams - How? Workshop; Cockcroft Institute, UK; August 2007.
[arXiv: 0711.4819]. pdf postscript

2) Polarization buildup by spin filtering in storage rings.
By D. S. O'Brien (Trinity College Dublin).
Proceedings of the 12th International Workshop on High Energy Spin Physics (DSPIN-07); Dubna, Russia; September 2007.
[arXiv: 0711.1270]. pdf postscript

3) Dynamics of polarization buildup by spin filtering.
By N. H. Buttimore and D. S. O'Brien (Trinity College Dublin).
Eur. Phys. J. A 35, 47-55 (2008).
e-Print Archive: arXiv:0707.2065.

4) Helicity amplitudes and crossing relations for antiproton proton reactions.
By N. H. Buttimore and E. Jennings (Trinity College Dublin).
To be published in Eur. Phys. J. A.
e-Print Archive: hep-ph/0702248.

5) Antiproton polarization induced by lepton interactions.
By D. S. O Brien and N. H. Buttimore (Trinity College Dublin).
Published in proceedings of SPIN-PRAHA-2006
Czech. J. Phys. 56 F219 - F228 (2006).
e-Print Archive: hep-ph/0609233.

6) Polarisation observables in lepton antilepton to proton antiproton reactions including lepton mass.
By E. Jennings and N. H. Buttimore (Trinity College Dublin).
Eur. Phys. J. A 31, 9 (2007).
e-Print Archive: hep-ph/0607227.

7) Spin dependent elastic antiproton interactions.
By D. S. O Brien and N. H. Buttimore (Trinity College Dublin).
Published in proceedings of SPIN-PRAHA-2005
Czech. J. Phys. 56 C265 - C270 (2006).
e-Print Archive: hep-ph/0605099.

8) Deuteron polarization determination at high energies.
By N. H. Buttimore (Trinity College Dublin), T. L. Trueman (Brookhaven),. Oct 2004.
Published in *Trieste/Mainz 2004, SPIN 2004* 706-709

9) Antiproton-proton scattering experiments with polarization.
By PAX Collaboration (Vincenzo Barone et al.). May 2005.
e-Print Archive: hep-ex/0505054.

Recent Talks

"Polarization buildup by spin filtering in storage rings" Talk at the 12th International workshop on high energy spin physics, Dubna, Russia; September 2007.

"Dynamics of polarization buildup by spin filtering" Talk at the Polarized Antiproton Beams - How? Workshop, Cockcroft Institute, Daresbury Laboratory, UK; August 2007.

"An overview of the physics processes involved in spin transfer" Talk at the Polarized Antiproton Beams - How? Workshop, Cockcroft Institute, Daresbury Laboratory, UK; August 2007.

"Spin observables for polarizing antiprotons" Seminar given at the European Centre for Theoretical studies in nuclear physics and related areas (ECT*), Trento, Italy. November 2006.

"Spin observables for polarizing antiprotons". Talk given at the 17th International Spin Physics Symposium (SPIN 2006); Kyoto, Japan; October 2006.

"Polarised antiprotons induced by lepton interactions". Talk given at the Advanced Studies Institute on "Symmetries and Spin" (SPIN-PRAHA-2006), Prague, Czech Republic; July 2006. Also given at the Dubna Internation Advanced School of Theoretical Physics, "Calculations for modern and future colliders". Dubna, Moscow region, Russia; July 2006

"Spin dependent elastic antiproton interactions". Talk given at the Advanced Studies Institute on "Symmetries and Spin" (SPIN-PRAHA-2005), Prague, Czech Republic; July 2005. Also given at the IOP Young Physicists Conference 2005; Dublin.

"Deuteron polarization determination at high energies". Talk given at the International Spin Physics Symposium, (SPIN 2004) in Trieste, Italy; October 2004.

Recent Conferences / Workshops

Polarized Antiproton Beams - How? Workshop in the Cockcroft Institute, Daresbury Lab, near Manchester, UK. August 2007.

DSPIN-07 12th Workshop On High Energy Spin Physics, Dubna, Moscow Region, Russia. September 2007.