Search for Contact Interactions, Large Extra Dimensions and Finite Quark Radius in ep Collisions at HERA

ZEUS Collaboration

doi:10.1016/j.physletb.2004.03.081

Search for Contact Interactions, Large Extra Dimensions and Finite Quark Radius in ep Collisions at HERA

ZEUS Collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

A search for physics beyond the Standard Model has been performed with high-Q2 neutral current deep inelastic scattering events recorded with the ZEUS detector at HERA. Two data sets, e+p→e +X and e-p→e-X, with respective integrated luminosities of 112 pb-1 and 16 pb-1, were analyzed. The data reach Q2 values as high as 40000 GeV2. No significant deviations from Standard Model predictions were observed. Limits were derived on the effective mass scale in eeqq contact interactions, the ratio of leptoquark mass to the Yukawa coupling for heavy leptoquark models and the mass scale parameter in models with large extra dimensions. The limit on the quark charge radius, in the classical form factor approximation, is 0.85×10 -16 cm.

Original language	American English
Pages (from-to)	23-41
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	591
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2004.03.081
State	Published - Jul 1 2004

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Physics

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@article{ab1a3682b74f4100b40461000f6629e7,

title = "Search for Contact Interactions, Large Extra Dimensions and Finite Quark Radius in ep Collisions at HERA",

abstract = "A search for physics beyond the Standard Model has been performed with high-Q2 neutral current deep inelastic scattering events recorded with the ZEUS detector at HERA. Two data sets, e+p→e +X and e-p→e-X, with respective integrated luminosities of 112 pb-1 and 16 pb-1, were analyzed. The data reach Q2 values as high as 40000 GeV2. No significant deviations from Standard Model predictions were observed. Limits were derived on the effective mass scale in eeqq contact interactions, the ratio of leptoquark mass to the Yukawa coupling for heavy leptoquark models and the mass scale parameter in models with large extra dimensions. The limit on the quark charge radius, in the classical form factor approximation, is 0.85{\texttimes}10 -16 cm.",

author = "\{ZEUS Collaboration\} and Mattingly, \{Margarita C. K.\}",

year = "2004",

month = jul,

day = "1",

doi = "10.1016/j.physletb.2004.03.081",

language = "American English",

volume = "591",

pages = "23--41",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

number = "1-2",

}

TY - JOUR

T1 - Search for Contact Interactions, Large Extra Dimensions and Finite Quark Radius in ep Collisions at HERA

AU - ZEUS Collaboration

AU - Mattingly, Margarita C. K.

PY - 2004/7/1

Y1 - 2004/7/1

N2 - A search for physics beyond the Standard Model has been performed with high-Q2 neutral current deep inelastic scattering events recorded with the ZEUS detector at HERA. Two data sets, e+p→e +X and e-p→e-X, with respective integrated luminosities of 112 pb-1 and 16 pb-1, were analyzed. The data reach Q2 values as high as 40000 GeV2. No significant deviations from Standard Model predictions were observed. Limits were derived on the effective mass scale in eeqq contact interactions, the ratio of leptoquark mass to the Yukawa coupling for heavy leptoquark models and the mass scale parameter in models with large extra dimensions. The limit on the quark charge radius, in the classical form factor approximation, is 0.85×10 -16 cm.

AB - A search for physics beyond the Standard Model has been performed with high-Q2 neutral current deep inelastic scattering events recorded with the ZEUS detector at HERA. Two data sets, e+p→e +X and e-p→e-X, with respective integrated luminosities of 112 pb-1 and 16 pb-1, were analyzed. The data reach Q2 values as high as 40000 GeV2. No significant deviations from Standard Model predictions were observed. Limits were derived on the effective mass scale in eeqq contact interactions, the ratio of leptoquark mass to the Yukawa coupling for heavy leptoquark models and the mass scale parameter in models with large extra dimensions. The limit on the quark charge radius, in the classical form factor approximation, is 0.85×10 -16 cm.

UR - https://digitalcommons.andrews.edu/pubs/2199

U2 - 10.1016/j.physletb.2004.03.081

DO - 10.1016/j.physletb.2004.03.081

M3 - Article

VL - 591

SP - 23

EP - 41

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -

Search for Contact Interactions, Large Extra Dimensions and Finite Quark Radius in ep Collisions at HERA

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