https://doi.org/10.1140/epjc/s10052-010-1237-2
Regular Article - Theoretical Physics
Probing scalar particle and unparticle couplings in
with transversely polarized beams
1
Loodus- ja Tehnoloogiateaduskond, Füüsika Instituut, Tartu Ülikool, Riia 142, 51014, Tartu, Estonia
2
Institut für Physik der Johannes-Gutenberg-Universität, Staudinger Weg 7, 55099, Mainz, Germany
* e-mail: groote@thep.physik.uni-mainz.de
Received:
14
August
2009
Revised:
10
December
2009
Published online:
13
January
2010
In searching for indications of new-physics scalar particle and unparticle couplings in
, we consider the role of transversely polarized initial beams at e
+
e
− colliders. By using a general relativistic spin density matrix formalism for describing the particles spin states, we find analytical expressions for the differential cross section of the process with t or
polarization measured, including the anomalous coupling contributions. Thanks to the transversely polarized initial beams these contributions are first order anomalous coupling corrections to the Standard Model (SM) contributions. We present and analyze the main features of the SM and anomalous coupling contributions. We show how differences between SM and anomalous coupling contributions provide means to search for anomalous coupling manifestations at future e
+
e
− linear colliders.
© Springer-Verlag / Società Italiana di Fisica, 2010
