Comparison of jet size in. nu. /sup -/p interactions with that in e/sup +/e/sup -/ annihilation. [Below 10 GeV] Page: 3 of 12
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Data on e * c annihilation. [l-5] in the c. m. energy range 3 < V < 13
GeV have recently been compared fairly successfully with fragmentation jet
models and Quantum Chromodynamics (QCD) jet theories. However, it has
been suggested [f>-8] that in the QCD framework, due to gluon emission, the
single quark jet (the current fragments) produced in lepton-nucleon (IN) col-
lisions has different properties than the jets produced in e e collisions, while
the jet resulting from the recoiling quark-quark system (the target fragments)
will likely be more collimated than that of the single quark. Of course, in the
naive quark parton model (QPhl), a fragmenting single quark jet of a certain
flavor is expected to be the same in e^e and IN interactions. In both of these
models for fN collisions, one is also faced, with the complicatioi^of the pri-
mordial transverse momentum of the confined quarks in the nucleon. It there-
fore seems very important to experimentally compare the properties of jets
in fN and e ' e collisions.
In this paper wa present new vp charged-current data and show that the
observed jets are in fact very similar in angular size and shape to those
found in e ' e experiments for center-of-mass energies IV^ 10 GeV. IVc
also examine the direction in which the measured jet axis actually points in
* *f* o
v p [i X events at finite energy.
The data sample was obtained from exposures of the Fermilab 15-foot
hydrogen bubble chamber to a broad-band antineutrino beam. Over 90% of
the data were obtained using 400 GeV protons with focussing provided by two
magnetic horns. Data from neutrino-induced "background'1 events in the ex-
periment were also analyzed hnd are displayed in some of the distributions
in this paper. Only events with three or more charged particles were pro-
cessed. Neutral particles ard in general not detected in this experiment, so
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Derrick, M.; Fridman, A. & Gregory, P. Comparison of jet size in. nu. /sup -/p interactions with that in e/sup +/e/sup -/ annihilation. [Below 10 GeV], report, January 1, 1979; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1092405/m1/3/: accessed March 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.