We measure the particle-level forward-backward production asymmetry in b¯b pairs with masses (mb¯b) larger than 150 GeV/c 2, using events with hadronic jets and employing jet charge to distinguish b from ¯b. The measurement uses 9.5 fb−1 of pp¯ collisions at a center of mass energy of 1.96 TeV recorded by the CDF II detector. The asymmetry as a function of mb¯b is consistent with zero, as well as with the predictions of the standard model. The measurement disfavors a simple model including an axigluon with a mass of 200 GeV/c 2 whereas a model containing a heavier 345 GeV/c 2 axigluon is not excluded

First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass / Aaltonen, T., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J.A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Auerbach, B., Aurisano, A., Azfar, F., Badgett, W., Bae, T., Barbaro Galtieri, A., Barnes, V.E., Barnett, B.A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - STAMPA. - 92:3(2015). [10.1103/PhysRevD.92.032006]

First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass

GIAGU, Stefano;IORI, Maurizio;MARGAROLI, Fabrizio;
2015

Abstract

We measure the particle-level forward-backward production asymmetry in b¯b pairs with masses (mb¯b) larger than 150 GeV/c 2, using events with hadronic jets and employing jet charge to distinguish b from ¯b. The measurement uses 9.5 fb−1 of pp¯ collisions at a center of mass energy of 1.96 TeV recorded by the CDF II detector. The asymmetry as a function of mb¯b is consistent with zero, as well as with the predictions of the standard model. The measurement disfavors a simple model including an axigluon with a mass of 200 GeV/c 2 whereas a model containing a heavier 345 GeV/c 2 axigluon is not excluded
2015
Pp collisions; CDF II detector; physics
01 Pubblicazione su rivista::01a Articolo in rivista
First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass / Aaltonen, T., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J.A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Auerbach, B., Aurisano, A., Azfar, F., Badgett, W., Bae, T., Barbaro Galtieri, A., Barnes, V.E., Barnett, B.A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - STAMPA. - 92:3(2015). [10.1103/PhysRevD.92.032006]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/839804
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