Flavor changing single top quark production channels at e^+e^- colliders in the effective Lagrangian description

Details Flavor changing single top quark production channels at e^+e^- colliders in the effective Lagrangian description Flavor changing single top quark production channels at e^+e^- colliders in the effective Lagrangian description

1999-05-19

arxiv.org/abs/hep-ph/9905407v2

Phys.Rev. D60 (1999) 094016

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, plain latex, 7 figures embadded in the text using epsfig. Added new references and discussions regarding their relev

Scientific paper

10.1103/PhysRevD.60.094016

We perform a global analysis of the sensitivity of LEP2 and e^+e^- colliders with a c.m. energy in the range 500 - 2000 GeV to new flavor-changing single top quark production in the effective Lagrangian approach. The processes considered are sensitive to new flavor-changing effective vertices such as Ztc, htc, four-Fermi tcee contact terms as well as a right-handed Wtb coupling. We show that e^+ e^- colliders are most sensitive to the physics responsible for the contact tcee vertices. For example, it is found that the recent data from the 189 GeV LEP2 run can be used to rule out any new flavor physics that can generate these four-Fermi operators up to energy scales of \Lambda > 0.7 - 1.4 TeV, depending on the type of the four-Fermi interaction. We also show that a corresponding limit of \Lambda > 1.3 - 2.5 and \Lambda > 17 - 27 TeV can be reached at the future 200 GeV LEP2 run and a 1000 GeV e^+e^- collider, respectively. We note that these limits are much stronger than the typical limits which can be placed on flavor diagonal four-Fermi couplings. Similar results hold for \mu^+\mu^- colliders and for tu(bar) associated production. Finally we briefly comment on the necessity of measuring all flavor-changing effective vertices as they can be produced by different types of heavy physics.

Affiliated with

Also associated with

No associations

Rating

Flavor changing single top quark production channels at e^+e^- colliders in the effective Lagrangian description does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Flavor changing single top quark production channels at e^+e^- colliders in the effective Lagrangian description, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flavor changing single top quark production channels at e^+e^- colliders in the effective Lagrangian description will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-547225