Cargando…
New directions for top quark polarization in the $t$-channel process
We define three orthogonal axes to investigate the top quark polarization in the $t$-channel single top process. We provide expressions for the polarization in these axes in terms of anomalous $Wtb$ couplings. It is found that the polarizations in the two axes orthogonal to the spectator quark axis...
| Autores principales: | , |
|---|---|
| Lenguaje: | eng |
| Publicado: |
2014
|
| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.89.114009 http://cds.cern.ch/record/1693963 |
| _version_ | 1780935951641477120 |
|---|---|
| author | Aguilar-Saavedra, J.A. Amor Dos Santos, S. |
| author_facet | Aguilar-Saavedra, J.A. Amor Dos Santos, S. |
| author_sort | Aguilar-Saavedra, J.A. |
| collection | CERN |
| description | We define three orthogonal axes to investigate the top quark polarization in the $t$-channel single top process. We provide expressions for the polarization in these axes in terms of anomalous $Wtb$ couplings. It is found that the polarizations in the two axes orthogonal to the spectator quark axis are very sensitive to an anomalous coupling involving a $\bar b_L \sigma^{\mu \nu} t_R$ dipole term. In particular, an asymmetry based on the polarization normal to the production plane is more sensitive to the imaginary part of this coupling than previously studied observables. |
| id | cern-1693963 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2014 |
| record_format | invenio |
| spelling | cern-16939632023-03-14T19:38:50Zdoi:10.1103/PhysRevD.89.114009http://cds.cern.ch/record/1693963engAguilar-Saavedra, J.A.Amor Dos Santos, S.New directions for top quark polarization in the $t$-channel processParticle Physics - PhenomenologyWe define three orthogonal axes to investigate the top quark polarization in the $t$-channel single top process. We provide expressions for the polarization in these axes in terms of anomalous $Wtb$ couplings. It is found that the polarizations in the two axes orthogonal to the spectator quark axis are very sensitive to an anomalous coupling involving a $\bar b_L \sigma^{\mu \nu} t_R$ dipole term. In particular, an asymmetry based on the polarization normal to the production plane is more sensitive to the imaginary part of this coupling than previously studied observables.<p>We define three orthogonal axes to investigate the top-quark polarization in the <inline-formula><mml:math display="inline"><mml:mi>t</mml:mi></mml:math></inline-formula>-channel single-top process. We provide expressions for the polarization in these axes in terms of anomalous <inline-formula><mml:math display="inline"><mml:mi>W</mml:mi><mml:mi>t</mml:mi><mml:mi>b</mml:mi></mml:math></inline-formula> couplings. It is found that the polarizations in the two axes orthogonal to the spectator quark axis are very sensitive to an anomalous coupling involving a <inline-formula><mml:math display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>b</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover></mml:mrow><mml:mrow><mml:mi>L</mml:mi></mml:mrow></mml:msub><mml:msup><mml:mrow><mml:mi>σ</mml:mi></mml:mrow><mml:mrow><mml:mi>μ</mml:mi><mml:mi>ν</mml:mi></mml:mrow></mml:msup><mml:msub><mml:mrow><mml:mi>t</mml:mi></mml:mrow><mml:mrow><mml:mi>R</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math></inline-formula> dipole term. In particular, an asymmetry based on the polarization normal to the production plane is more sensitive to the imaginary part of this coupling than previously studied observables.</p>We define three orthogonal axes to investigate the top quark polarization in the $t$-channel single top process. We provide expressions for the polarization in these axes in terms of anomalous $Wtb$ couplings. It is found that the polarizations in the two axes orthogonal to the spectator quark axis are very sensitive to an anomalous coupling involving a $\bar b_L \sigma^{\mu \nu} t_R$ dipole term. In particular, an asymmetry based on the polarization normal to the production plane is more sensitive to the imaginary part of this coupling than previously studied observables.arXiv:1404.1585CERN-PH-TH-2014-086CERN-PH-TH-2014-086oai:cds.cern.ch:16939632014-04-06 |
| spellingShingle | Particle Physics - Phenomenology Aguilar-Saavedra, J.A. Amor Dos Santos, S. New directions for top quark polarization in the $t$-channel process |
| title | New directions for top quark polarization in the $t$-channel process |
| title_full | New directions for top quark polarization in the $t$-channel process |
| title_fullStr | New directions for top quark polarization in the $t$-channel process |
| title_full_unstemmed | New directions for top quark polarization in the $t$-channel process |
| title_short | New directions for top quark polarization in the $t$-channel process |
| title_sort | new directions for top quark polarization in the $t$-channel process |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1103/PhysRevD.89.114009 http://cds.cern.ch/record/1693963 |
| work_keys_str_mv | AT aguilarsaavedraja newdirectionsfortopquarkpolarizationinthetchannelprocess AT amordossantoss newdirectionsfortopquarkpolarizationinthetchannelprocess |