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19922026
Showing 1999 · hep-phShow all

18 papers · 2 filters

hep-ph1999★ 10 cited

New Physics and Short-Distance s->d gamma Transition in Omega^- -> Cascade^- gamma Decay

Jusak Tandean

We study the contributions of physics beyond the standard model to the short-distance s->d gamma transition in Omega^- -> Cascade^- gamma decay. We explore the possibility that the…

hep-ph1999★ 24 cited

Dijet Production at Hadron Colliders in Theories with Large Extra Dimensions

David Atwood, Shaouly Bar-Shalom, Amarjit Soni

We consider the production of high invariant mass jet pairs at hadron colliders as a test for TeV scale gravitational effects. We find that this signal can probe effective Planck m…

hep-ph1999★ 3 cited

The Next-to-Leading BFKL Pomeron with Optimal Renormalization

Victor T. Kim, Lev N. Lipatov, Grigorii B. Pivovarov

The next-to-leading order (NLO) corrections to the BFKL equation in the BLM optimal scale setting are briefly discussed. A striking feature of the BLM approach is rather weak Q^2-d…

hep-ph1999★ 92 cited

Long-Baseline Study of the Leading Neutrino Oscillation at a Neutrino Factory

V. Barger, S. Geer, R. Raja +1

Within the framework of three-flavor neutrino oscillations, we consider the physics potential of ν_e --> ν_μappearance and ν_μ--> ν_μsurvival measurements at a neutrino factory for…

hep-ph1999★ 11 cited

Universality in nuclear dependence coefficient

Xiaofeng Guo, Jianwei Qiu, Xiaofei Zhang

We derive the nuclear dependence coefficient for Drell-Yan and J/ production. We show that at small , the is given by an universal functional form: $α(q_T…

hep-ph1999★ 4 cited

Dependence of Drell-Yan Transverse Moemtum Broadening

Xiaofeng Guo, Xiaofei Zhang, Wei Zhu

We analyze dependence of Drell-Yan transverse momentum broadening in hadron-nucleus collisions. In terms of generalized factorization theorem, we show that the dependen…

hep-ph1999★ 47 cited

CP Violation in Hyperon Decays from Supersymmetry

Xiao-Gang He, Hitoshi Murayama, Sandip Pakvasa +1

It was pointed out recently that supersymmetry can generate flavor-changing gluonic dipole operators with sufficiently large coefficients to dominate the observed value of epsilon'…

hep-ph1999★ 10 cited

Graviton Production By Two Photon and Electron-Photon Processes In Kaluza-Klein Theories With Large Extra Dimensions

David Atwood, Shaouly Bar-Shalom, Amarjit Soni

We consider the production of gravitons via two photon and electron-photon fusion in Kaluza-Klein theories which allow TeV scale gravitational interactions. We show that at electro…

hep-ph1999★ 106 cited

Semileptonic and non-leptonic B_c decays

A. Abd El-Hady, J. H. Muñoz, J. P. Vary

We make predictions for the exclusive semileptonic and the non-leptonic decay widths of the B_c meson. We evaluate the B_c semileptonic form factors for different decay channels in…

hep-ph1999★ 4 cited

Comment on the Matrix Element of

Xiao-Gang He, German Valencia

The gluon dipole operator, , has received much attention recently because it can have a large coefficient in some SUSY extensions of the standard model. We find that the co…

hep-ph1999★ 32 cited

Additional Isospin-Breaking Effects in ε^\prime/ε

S. Gardner, G. Valencia

In the analysis of ε^\prime/εit has been traditional to consider the isospin-breaking effects arising from electroweak-penguin contributions and from π^0-ηand π^0-η^\prime mixing,…

hep-ph1999★ 12 cited

Constraints on from Radiative Hyperon and Kaon Decays

Xiao-Gang He, German Valencia

The quark-level process has been used extensively to place constraints on new interactions. These same interactions can be further constrained from the enhancement they…

hep-ph1999★ 44 cited

R-parity violation and top quark polarization at the Fermilab Tevatron collider

Ken-ichi Hikasa, Jin Min Yang, Bing-Lin Young

The lepton or baryon number violating top quark interactions in the supersymmetric standard model with R parity violation contribute to the process d dbar to t tbar at the tree lev…

hep-ph1999★ 16 cited

Hyperon Nonleptonic Decays in Chiral Perturbation Theory Reexamined

A. Abd El-Hady, Jusak Tandean

We recalculate the leading nonanalytic contributions to the amplitudes for hyperon nonleptonic decays in chiral perturbation theory. Our results partially disagree with those calcu…

hep-ph1999★ 23 cited

Gauge Boson - Gauge Boson Scattering in Theories with Large Extra Dimensions

David Atwood, Shaouly Bar-Shalom, Amarjit Soni

We consider the scattering amplitudes of the form V_1 V_2 -> V_3 V_4, where V_i=γ, Z, W or g(=gluon) are the Standard Model gauge bosons, due to graviton exchange in Kaluza-Klein t…

hep-ph1999★ 25 cited

Seasonal and Energy Dependence of Solar Neutrino Vacuum Oscillations

V. Barger, K. Whisnant

We make a global vacuum neutrino oscillation analysis of solar neutrino data, including the seasonal and energy dependence of the recent Super-Kamiokande 708-day results. The best…

hep-ph1999★ 64 cited

Neutrino Mixing, CP/T Violation and Textures in Four-Neutrino Models

V. Barger, Yuan-Ben Dai, K. Whisnant +1

We examine the prospects for determining the neutrino mixing matrix and for observing CP and T violation in neutrino oscillations in four-neutrino models. We focus on a general cla…

hep-ph1999★ 5 cited

Experimental and Theoretical Results for Weak Charge Current Backward Proton Production

C. E. Carlson, J. Hanlon, K. E. Lassila

In this paper, we do three things in the study of deuteron break-up by high energy neutrino beams. (1) We present previously unpublished data on neutrino induced backward protons f…