Direct probes of R-parity-violating supersymmetric couplings via single-top-squark production

نویسندگان

  • Edmond L. Berger
  • B. W. Harris
چکیده

We study the s-channel production of a single top squark in hadron collisions through an R-parity-violating mechanism, examining in detail the case in which the squark decays through an R-parity-conserving process into a bottom quark, a lepton, and missing energy. We show that the top squark can be discovered if its mass is less than 400 GeV, or that the current bound on the size of the R-parity-violating couplings can be reduced by up to one order of magnitude with existing data and by two orders of magnitude at the forthcoming run II of the Fermilab Tevatron. PACS numbers: 11.30.Pb, 12.60.Jv, 14.80.Ly Typeset using REVTEX 1

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Single top quark production as a probe of R-parity-violating SUSY at pp and pp̄ colliders

We investigate the ability of single top quark production via qq → squark → tb and qq̄ → slepton → tb̄ at the LHC and Tevatron to probe the strength of R-parity violating couplings in the minimal supersymmetric model. We found that given the existing bounds on R-parity violating couplings, single top quark production may be greatly enhanced over that predicted by the standard model, and that both...

متن کامل

Constraining top squark in R-parity violating SUSY model using existing Tevatron data

Signal of lighter top squark has been looked for using Tevatron data in the dielectron plus di-jet channel. We find that the mass of the lighter top squark when it decays dominantly in the electron plus jet channel, can be ruled out up to 220 GeV at 95% C.L. using di-electron data. In the framework of R-parity breaking SUSY model we exclude relevant R-parity violating couplings for a range of t...

متن کامل

Single-top-squark production via R-parity-violating supersymmetric couplings in hadron collisions

In supersymmetric extensions of the standard model, particles may be assigned a new quantum number called R-parity (Rp) [1]. The particles of the standard model are Rp even, and their corresponding superpartners are Rp odd. The bounds on possible Rp-violating couplings are relatively restrictive for the first two generations of quarks and leptons, but much less so for states of the third genera...

متن کامل

Effects of R-parity violating supersymmetry in top pair production at linear colliders with polarized beams

In the minimal supersymmetric standard model with R-parity violation, the lepton number violating top quark interactions can contribute to the top pair production at a linear collider via tree-level u-channel squark exchange diagrams. We calculate such contributions and find that in the allowed range of these R-violating couplings, the top pair production rate as well as the top quark polarizat...

متن کامل

R-parity-violating SUSY effects and signals in single top production at the Tevatron

We discuss single top quark production via ud̄ → tb̄ at the Fermilab Tevatron in the minimal supersymmetric model with R-parity violation. We find that within the allowed range of coupling constants, the lepton-number violating couplings can give rise to observable effects when the slepton mass lies in a specific narrow range. For the baryon-number violating couplings, the contribution to the pro...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2000