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Shout at the eta
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Quantum chromodynamics has interesting limits both in the low and the high-energy region. In the low energy region one has phenomenology of meson interactions which are still not clearly understood. In the high-energy region one wants to find a new theory which will envelope gravity and the standard model in the quantum framework, possibly via some kind of string theory.

In this thesis some aspects are touched upon including both these limits. On the one hand we look at meson scattering close to threshold and try to describe cross sections via phenomenological models such as the two-step model. We then go on and dwell upon noncommutative geometry, a framework which has been successful in describing certain aspects of the theory of strings.

The low-energy calculations gave some insight into the need for finding better understanding of the theories of mesons. The work on noncommutative geometry was on the other hand fruitful in gaining understanding of certain connections between different star products and their relations on a local level.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 2004. , p. 48
Series
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 1044
Keywords [en]
Nuclear physics, Theoretical physics, Meson production, Noncommutative geometry
Keywords [sv]
Kärnfysik
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-4682ISBN: 91-554-6103-4 (print)OAI: oai:DiVA.org:uu-4682DiVA, id: diva2:165482
Public defence
2004-12-16, Häggsalen, Ångström laboratory, Lägerhyddsvägen 1, Polacksbacken, Uppsala, 10:15
Opponent
Supervisors
Available from: 2004-11-22 Created: 2004-11-22Bibliographically approved
List of papers
1. The pd → 3He η reaction near threshold
Open this publication in new window or tab >>The pd → 3He η reaction near threshold
2003 In: Phys. Rev. C, Vol. 67, p. 6-Article in journal (Refereed) Published
Identifiers
urn:nbn:se:uu:diva-92413 (URN)
Available from: 2004-11-22 Created: 2004-11-22Bibliographically approved
2. The NN → NN η reaction revisited
Open this publication in new window or tab >>The NN → NN η reaction revisited
Article in journal (Refereed) Submitted
Identifiers
urn:nbn:se:uu:diva-92414 (URN)
Available from: 2004-11-22 Created: 2004-11-22Bibliographically approved
3. The production of theta baryons in proton-deuteron collisions near threshold
Open this publication in new window or tab >>The production of theta baryons in proton-deuteron collisions near threshold
Article in journal (Refereed) Submitted
Identifiers
urn:nbn:se:uu:diva-92415 (URN)
Available from: 2004-11-22 Created: 2004-11-22Bibliographically approved
4. Invariant Star Products on S 2 and the Canonical Trace
Open this publication in new window or tab >>Invariant Star Products on S 2 and the Canonical Trace
2004 (English)In: Letters in Mathematical Physics, ISSN 0377-9017, E-ISSN 1573-0530, Vol. 70, no 2, p. 109-120Article in journal (Refereed) Published
Abstract [en]

We calculate the canonical trace and use the Fedosov–Nest–Tsygan index theorem to obtain the characteristic class for a star product on S 2. We show how, for this simple example, it is possible to extract the relevant information needed to use the Fedosov–Nest–Tsygan index theorem from a local calculation.

National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-92416 (URN)10.1007/s11005-004-4290-7 (DOI)
Available from: 2004-11-22 Created: 2004-11-22 Last updated: 2017-12-14Bibliographically approved

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