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Title: Split fermions in extra dimensions and exponentially small cross sections at future colliders

Abstract

We point out a dramatic new experimental signature for a class of theories with extra dimensions, where quarks and leptons are localized at slightly separated parallel ''walls'' whereas gauge and Higgs fields live in the bulk of the extra dimensions. The separation forbids direct local couplings between quarks and leptons, allowing for an elegant solution to the proton decay problem. We show that scattering cross sections for collisions of fermions which are separated in the extra dimensions vanish exponentially at energies high enough to probe the separation distance. This is because the separation puts a lower bound on the attainable impact parameter in the collision. We present cross sections for two body high energy scattering and estimate the power with which future colliders can probe this scenario, finding sensitivity to inverse fermion separations of order 10-70 TeV. (c) 2000 The American Physical Society.

Authors:
 [1];  [2];  [3];  [3]
  1. Department of Physics, University of California, Berkeley, California 94720 (United States)
  2. (United States)
  3. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
Publication Date:
OSTI Identifier:
20216474
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 61; Journal Issue: 11; Other Information: PBD: 1 Jun 2000; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; STANDARD MODEL; UNIFIED GAUGE MODELS; QUARK MODEL; FERMIONS; CROSS SECTIONS; MANY-DIMENSIONAL CALCULATIONS; SCATTERING; THEORETICAL DATA

Citation Formats

Arkani-Hamed, Nima, Theoretical Physics Group, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, Grossman, Yuval, and Schmaltz, Martin. Split fermions in extra dimensions and exponentially small cross sections at future colliders. United States: N. p., 2000. Web. doi:10.1103/PhysRevD.61.115004.
Arkani-Hamed, Nima, Theoretical Physics Group, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, Grossman, Yuval, & Schmaltz, Martin. Split fermions in extra dimensions and exponentially small cross sections at future colliders. United States. doi:10.1103/PhysRevD.61.115004.
Arkani-Hamed, Nima, Theoretical Physics Group, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, Grossman, Yuval, and Schmaltz, Martin. Thu . "Split fermions in extra dimensions and exponentially small cross sections at future colliders". United States. doi:10.1103/PhysRevD.61.115004.
@article{osti_20216474,
title = {Split fermions in extra dimensions and exponentially small cross sections at future colliders},
author = {Arkani-Hamed, Nima and Theoretical Physics Group, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 and Grossman, Yuval and Schmaltz, Martin},
abstractNote = {We point out a dramatic new experimental signature for a class of theories with extra dimensions, where quarks and leptons are localized at slightly separated parallel ''walls'' whereas gauge and Higgs fields live in the bulk of the extra dimensions. The separation forbids direct local couplings between quarks and leptons, allowing for an elegant solution to the proton decay problem. We show that scattering cross sections for collisions of fermions which are separated in the extra dimensions vanish exponentially at energies high enough to probe the separation distance. This is because the separation puts a lower bound on the attainable impact parameter in the collision. We present cross sections for two body high energy scattering and estimate the power with which future colliders can probe this scenario, finding sensitivity to inverse fermion separations of order 10-70 TeV. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevD.61.115004},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 61,
place = {United States},
year = {2000},
month = {6}
}