39,092 research outputs found
Structure Function Measurement at HERA
Preliminary results on a measurement of the proton structure function F_2 are
reported for momentum transfers squared Q^2 between 1.5~GeV^2 and 5000 GeV^2
and for Bjorken x between 5.10^{-5} and 0.32 using data collected by the HERA
experiments H1 and ZEUS in 1994. F_2 increases significantly with decreasing x,
even in the lowest reachable Q^2 region. The data are well described by a Next
to Leading Order QCD fit, and support within the present precision that the
rise at low x within this Q^2 range is generated "radiatively" via the DGLAP
evolution equations. Prospects for future structure function measurements at
HERA are briefly mentioned.Comment: 16 pages, with 7 encapsulated figures sent separatel
A Note on the Rotationally Symmetric SO(4) Euler Rigid Body
We consider an SO(4) Euler rigid body with two 'inertia momenta' coinciding.
We study it from the point of view of bihamiltonian geometry. We show how to
algebraically integrate it by means of the method of separation of variables.Comment: This is a contribution to the Vadim Kuznetsov Memorial Issue on
Integrable Systems and Related Topics, published in SIGMA (Symmetry,
Integrability and Geometry: Methods and Applications) at
http://www.emis.de/journals/SIGMA
Searches for Higgs Boson(s) at the Upgraded Tevatron
We summarize the status of Higgs boson searches at the upgraded Fermilab
Tevatron performed by the DO and CDF collaborations. We report on three
categories of searches, namely 1) the search for the Standard Model Higgs boson
(p\bar{p} --> H, WH or ZH, with H --> WW* and/or H --> b\bar{b}), 2) the search
for the minimal supersymmetric Higgs boson using p\bar{p} --> hb\bar{b} -->
b\bar{b}b\bar{b} and p\bar{p} --> hX --> tau tau X, 3) the search for doubly
charged Higgs boson.Comment: 10 pages, Moriond Electroweak 2005 conference proceeding
H1 Results in Deep Inelastic Scattering
Recent deep inelastic results from the H1 collaboration are presented. The
topics covered include inclusive diffractive physics, the determination of
alpha_S using the event shapes, the study of the hadronic final state at low x
with single particles and with jets, the structure function measurements in
particular F_2 at low Q^2 and the high Q^2 physics both in neutral and charged
current.Comment: H1 plenary talk at the Chicago 5th DIS and QCD workshop. To appear in
the Proceedings. Latex, 19 pages, 16 figure
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