skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Testing the Nature of Kaluza-Klein Excitations at Future Lepton Colliders

Abstract

With one extra dimension, current high precision electroweak data constrain the masses of the first Kaluza-Klein excitations of the Standard Model gauge fields to lie above {approx_equal} 4 TeV. States with masses not much larger than this should be observable at the LHC. However, even for first excitation masses close to this lower bound, the second set of excitations will be too heavy to be produced thus eliminating the possibility of realizing the cleanest signature for KK scenarios. Previous studies of heavy $Z'$ and $W'$ production in this mass range at the LHC have demonstrated that very little information can be obtained about their couplings to the conventional fermions given the limited available statistics and imply that the LHC cannot distinguish an ordinary $Z'$ from the degenerate pair of the first KK excitations of the {gamma} and Z. In this paper we discuss the capability of lepton colliders with center of mass energies significantly below the excitation mass to resolve this ambiguity. In addition, we examine how direct measurements obtained on and near the top of the first excitation peak at lepton colliders can confirm these results. For more than one extra dimension we demonstrate that it is likely thatmore » the first KK excitation is too massive to be produced at the LHC.« less

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
12472
Report Number(s):
SLAC-PUB-8218
TRN: US0102528
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 3 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 43 PARTICLE ACCELERATORS; EXCITATION; FERMIONS; PARTICLE PRODUCTION; STANDARD MODEL; STATISTICS; TESTING; KALUZA-KLEIN THEORY; HEAVY ION ACCELERATORS; LEPTON BEAMS; LINEAR COLLIDERS

Citation Formats

Rizzo, Thomas G. Testing the Nature of Kaluza-Klein Excitations at Future Lepton Colliders. United States: N. p., 1999. Web. doi:10.2172/12472.
Rizzo, Thomas G. Testing the Nature of Kaluza-Klein Excitations at Future Lepton Colliders. United States. doi:10.2172/12472.
Rizzo, Thomas G. Fri . "Testing the Nature of Kaluza-Klein Excitations at Future Lepton Colliders". United States. doi:10.2172/12472. https://www.osti.gov/servlets/purl/12472.
@article{osti_12472,
title = {Testing the Nature of Kaluza-Klein Excitations at Future Lepton Colliders},
author = {Rizzo, Thomas G.},
abstractNote = {With one extra dimension, current high precision electroweak data constrain the masses of the first Kaluza-Klein excitations of the Standard Model gauge fields to lie above {approx_equal} 4 TeV. States with masses not much larger than this should be observable at the LHC. However, even for first excitation masses close to this lower bound, the second set of excitations will be too heavy to be produced thus eliminating the possibility of realizing the cleanest signature for KK scenarios. Previous studies of heavy $Z'$ and $W'$ production in this mass range at the LHC have demonstrated that very little information can be obtained about their couplings to the conventional fermions given the limited available statistics and imply that the LHC cannot distinguish an ordinary $Z'$ from the degenerate pair of the first KK excitations of the {gamma} and Z. In this paper we discuss the capability of lepton colliders with center of mass energies significantly below the excitation mass to resolve this ambiguity. In addition, we examine how direct measurements obtained on and near the top of the first excitation peak at lepton colliders can confirm these results. For more than one extra dimension we demonstrate that it is likely that the first KK excitation is too massive to be produced at the LHC.},
doi = {10.2172/12472},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}

Technical Report:

Save / Share: