QUARK COMPOSITENESS, NEW PHYSICS, AND ULTRAHIGH-ENERGY COSMIC-RAY DOUBLE-CORE GAMMA-FAMILY EVENTS

Authors
CAO Z DING LK ZHU QQ HE YD
Citation
Z. Cao et al., QUARK COMPOSITENESS, NEW PHYSICS, AND ULTRAHIGH-ENERGY COSMIC-RAY DOUBLE-CORE GAMMA-FAMILY EVENTS, Physical review letters, 72(12), 1994, pp. 1794-1797
Citations number
32
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
72
Issue
12
Year of publication
1994
Pages
1794 - 1797
Database
ISI
SICI code
0031-9007(1994)72:12<1794:QCNPAU>2.0.ZU;2-D
Abstract
We find a significant excess of ultrahigh-energy cosmic-ray events at large transverse momenta with respect to the prediction by standard pe rturbative QCD at E(lab) approximately 10(4)-10(5) TeV, an energy regi me beyond the reach of existing colliders but within the range of futu re hadron colliders. Such a large deviation cannot be accounted for by a compositeness model of quarks with a characteristic energy scale LA MBDA(c) > 1.4 TeV allowed by current collider experiments, pointing to wards new physics.