Guide for the Use of the HIGH ENERGY PHYSICS INDEX Keywords 1996
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The terms in this keyword list are used by the DESY Documentation
Service for the indexing of papers on high energy
(beam momentum above 400 MeV (per nucleon)) and particle physics,
accelerator and detector technology and quantum field theory.
1. Purpose of Keywords Assignment
Our keywords serve the following purposes: they allow the generation of a
subject index for the biweekly periodical HIGH ENERGY PHYSICS INDEX (HEPI),
they are important for computerized information retrieval and SDI
(Selective Dissemination of Information) service at DESY and other
high-energy physics centers. The total keywords assigned to a paper
may also be useful as a sort of abstract.
A search by keywords is also valuable in SPIRES.
2. Form of Keyword Assignment
Keywords may be used singly or coupled by comma and blank (for example:
'field theory' (single) and 'field theory, nonabelian' (coupled)).
While the first term is generally a regular keyword, the second term may be a
keyword or a non-keyword.
Non-keywords which are frequently used are standardized; they are contained
in the alphabetical list (see also point 10).
3. Depth of Indexing
Papers on peripheral topics will usually have fewer keywords per paper than
papers on high energy physics. Examples of peripheral topics are
quantum mechanics, statistical mechanics, gravitation, astrophysics, and
nuclear physics with beam energy above 400 MeV/nucleon.
4. Classification
Beside of indexing the selected papers are classified with 16 topical
fields, one main and any number of secondary fields. For example:
Experimental papers on electroproduction of charmed particles are
assigned to the main field ((E)) and the secondary field ((C));
books on field theory are assigned to the main field ((3)) and the
secondary field ((Z)).
The 16 topical fields are the following:
I. Experimental Physics
((A)) general (also cosmic radiation, nuclear physics,
and gravitational radiation)
((B)) weak interactions
((C)) electromagnetic interactions, photoproduction
((D)) strong interactions
((E)) charm, beauty, truth
II. Technology and Techniques in High Energy Physics
((F)) accelerators
((G)) detecting systems, experimental methods and data analysis
methods
III. Theoretical Physics
((T)) general (also relativistic quantum mechanics, mathematics,
statistical mechanics, cosmic radiation,
nuclear physics, and gravitational radiation)
((U)) weak interactions
((V)) electromagnetic interactions, photoproduction
((W)) strong interactions
((X)) charm, beauty, truth
((Y)) symmetry principles (also current algebra)
((Z)) quantum field theory
IV. Monographs and Conference Proceedings
((3)) books
((4)) conferences
5. Two-Particle Initial State
Most of the combinations of any two particles (but not all) in the list
are single regular keywords. They are to be used for the description
of the initial state of interactions. The particles are arranged in order
of rising masses, in case of same masses in order of charges:
positive particle before negative particle
(except 'electron positron' and 'anti-p p').
6. Particle Spectra and Other Particle Combinations
Particles or particle combinations in final or intermediate states
in conjunction with the keywords:
angular correlation, angular distribution, bound state, correlation,
coupling, coupling constant, double-beta decay, energy spectrum,
final state, interference, mass difference, mass ratio,
mass spectrum, mixing angle, momentum spectrum, particle identification,
universality, vertex function, yield
follow the keyword and are listed in parentheses in the order of
decreasing masses, in case of same masses in the order charge ( + - ).
Examples:
angular distribution, (photon)
final state, (n p 0lepton)
bound state, (nucleon 2pi)
mass spectrum, (pi+ pi- pi0)
but :
K0 anti-K0, interference
D0 anti-D0, interference
B0 anti-B0, interference
7. Reaction Equations
Reactions of two particles or decay modes of a particle are given as
in the following examples:
anti-p p --> K0 K- pi+
p p --> p anything
Delta(1232)0 --> p pi-
photon deuteron --> 2p pi- (n)pi0 anything0
Particles on the left-hand side are arranged in the order of beam and
target, particles on the right-hand side are arranged in the order of
decreasing masses, in case of equal masses in the order of charge ( + - ).
8. Resonances
Meson and baryon resonances are generally named as in the Particle Data
Group Tables; charge states are indicated only for the rho(770) and
the Delta(1232). Heavy-quark particles are commonly not calles resonances.
For new and yet unnamed resonances the mass (in MeV) may be
given in parentheses,
e.g. mass enhancement, (1440) or postulated particle, (1440) .
9. Energy Declarations
Energy resp. momentum is given in the same way as in the paper, but always
in GeV, above 10**5 in exponential form.
Additionally papers are assigned to energy-ranges.
------------------------------------------------------------------
| | | E(beam) [GeV] (target: nucleon)|
| | |------------------------------------------|
| Range | E(cms) | | | |
| | [GeV] | beam: e-, | beam: K | beam: p |
| | | photon, pi | | |
|-------|-------------|--------------|--------------|------------|
| ((1)) | 0.0 - 3.0 | 0.0 - 4.32 | 0.0 - 4.20 | 0.0 - 3.85|
| ((2)) | - 10.0 | - 52.8 | - 52.7 | - 52.3|
| ((3)) | - 30.0 | - 479. | - 479. | - 478.|
| ((4)) | - 100.0 | .... - 5325. .... |
| ((5)) | - 300.0 | .... - 47900. .... |
| ((6)) | - 1000.0 | .... - 532500. .... |
| ((7)) | - 10000.0 | .... - 53250000. .... |
| ((8)) | > 10000.0 | .... > 53250000. .... |
------------------------------------------------------------------
For asymmetric colliders the centre-of-mass energy is
E(cms) = 2 sqrt(E(1)E(2)).
No energy range is given in case of cosmic radiation (when no interactions
are discussed) and for nucleus nucleus interactions.
Additional information on momentum transfer, limited angular range,
etc. may be included. The general rules are illustrated by the
following examples :
1.5-2.7 GeV-cms, ((1))
1.75, 3.00, 4.50 GeV/c, ((1)) ((2))
351 GeV (pi), 280 GeV (p), ((3))
27.7 GeV/c/nucleon, 8.4 GeV-cms/nucleon
> 5*10**5 GeV, 2-5 degrees, ((6)) ((7)) ((8))
approx. 200 GeV/c, 0.5 < |t| < 2.5 GeV**2, ((3))
10. Alphabetical Keyword List
There are three kinds of entries in the alphabetical list:
regular keywords (boldface and blank space in column 1);
standardized non-keywords ("*" in column 1); these terms are generally
coupled to regular keywords. There are also non-keywords which have
not been standardized; they are not contained in this keyword list;
terms which are not used ("-" in column 1).
Comments or rules of use are given in parentheses."Restricted use" means
that a keyword is used only in cases where it is of central importance
in the paper considered.
Entries are ordered in the following sorting sequence:
blank . ( + | * ) ; - / , < > : ' = 0....9 aA....zZ