Results
- Showing results for:
- Reset all filters
Search results
-
Conference paperD'Alessandro R, Albergo S, Angarano M, et al., 1998,
The CMS silicon tracker
, 8th International Wire Chamber Conference, Publisher: ELSEVIER SCIENCE BV, Pages: 538-543, ISSN: 0168-9002 -
Journal articleHori M, Torii HA, Hayano RS, et al., 1998,
Laser spectroscopic studies of state-dependent collisional quenching of the lifetimes of metastable antiprotonic helium atoms
, Physical Review A - Atomic, Molecular, and Optical Physics, Vol: 58, Pages: 1613-1627, ISSN: 1050-2947A laser spectroscopic method was developed to directly observe the lifetimes of individual states in metastable antiprotonic helium atoms (p̄ 4He+). Collisional effects with surrounding helium atoms were studied in cryogenic gas targets at pressures between 0.1 and 9.0 bars and at temperatures between 5.5 and 7.0 K. The metastable state (n, l) = (39,35) showed a lifetime of 1.5 μs, regardless of density, whereas the lifetime of the energetically lower-lying state (37,34) was found to shorten from 1.3 to 0.1 μs with increasing density. The lifetimes of the states (38,34) and (36,33) were determined to be 10 ns and 5 ns, respectively, showing the effects of the internal Auger process. When extrapolated to zero density, the measured lifetimes agreed with the results of calculations for the radiative and Auger widths. Using the fact that the state (37,34) becomes short lived at high density, the resonance (38,35)→(37,34) at a wavelength of 529.62 nm was detected.
-
Conference paperSmith PF, Smith NJT, Lewin JD, et al., 1998,
Dark matter experiments at the UK Boulby Mine
, Workshop on Primordial Black Holes and Hawking Radiation/3rd International Symposium on Sources and Detection of Dark Matter in the Universe, Publisher: ELSEVIER SCIENCE BV, Pages: 275-282, ISSN: 0370-1573- Author Web Link
- Cite
- Citations: 41
-
Journal articlePohl R, Hartmann FJ, Ketzer B, et al., 1998,
Influence of oxygen admixtures on the lifetime of metastable antiprotonic helium atoms
, PHYSICAL REVIEW A, Vol: 58, Pages: 4406-4415, ISSN: 1050-2947- Author Web Link
- Cite
- Citations: 9
-
Journal articleAbreu P, Adam W, Adye T, et al., 1998,
A search for η′<sub>c</sub> production in photon-photon fusion at LEP
, PHYSICS LETTERS B, Vol: 441, Pages: 479-490, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 26
-
Journal articleBarate R, Buskulic D, Decamp D, et al., 1998,
Searches for the neutral Higgs bosons of the MSSM in e<SUP>+</SUP>e<SUP>-</SUP> collisions at centre-of-mass energies of 181-184 GeV
, PHYSICS LETTERS B, Vol: 440, Pages: 419-434, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 28
-
Journal articleAbbiendi G, Ackerstaff K, Alexander G, et al., 1998,
Measurement of the longitudinal cross-section using the direction of the thrust axis in hadronic events at LEP
, PHYSICS LETTERS B, Vol: 440, Pages: 393-402, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 10
-
Journal articleBarate R, Buskulic D, Decamp D, et al., 1998,
Search for the standard model Higgs boson at the LEP2 collider near √s = 183 GeV
, PHYSICS LETTERS B, Vol: 440, Pages: 403-418, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 10
-
Journal articleAbreu P, Adam W, Adye T, et al., 1998,
Two-particle angular correlations in e<SUP>+</SUP>e<SUP>-</SUP> interactions compared with QCD predictions
, PHYSICS LETTERS B, Vol: 440, Pages: 203-216, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 7
-
Journal articleHassard J, Learner D, Colling D, 1998,
Hard facts for hard science
, PHYSICS WORLD, Vol: 11, Pages: 15-16, ISSN: 0953-8585 -
Journal articleHartmann FJ, Ketzer B, Maierl C, et al., 1998,
Laser spectroscopy of metastable states in the υ=2 cascade of antiprotonic <SUP>3</SUP>He
, PHYSICAL REVIEW A, Vol: 58, Pages: 3604-3610, ISSN: 1050-2947- Author Web Link
- Cite
- Citations: 10
-
Journal articleAckerstaff K, Alexander K, Allison J, et al., 1998,
Production of χ<sub>c2</sub> mesons in photon-photon collisions at LEP
, PHYSICS LETTERS B, Vol: 439, Pages: 197-208, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 24
-
Journal articleAbreu P, Adam W, Adye T, et al., 1998,
Measurement of |V<sub>cs</sub>| using W decays at LEP2
, PHYSICS LETTERS B, Vol: 439, Pages: 209-224, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 35
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Measurement of radiative Bhabha and quasi-real Compton scattering
, PHYSICS LETTERS B, Vol: 439, Pages: 183-196, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 5
-
Journal articleAbreu P, Adam W, Adye T, et al., 1998,
Measurement of
, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol: 439, Pages: 209-224, ISSN: 0370-2693Decays of W± bosons, produced at LEP2, have been used to measure the |Vcs| element of the Cabibbo-Kobayashi-Maskawa matrix. Values for |Vcs| were extracted both from the measured hadronic branching ratio of W± decays and by tagging the flavour of hadronic jets produced in W± decays. Applying the two methods to the data collected during 1996 at energies of 161 and 172 GeV, DELPHI obtains |Vcs| = 0.091+0.15-0.14(stat) ± 0.05(syst). © 1998 Elsevier Science B.V. All rights reserved.
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Measurement of the effective weak mixing angle by jet-charge asymmetry in hadronic decays of the Z boson
, PHYSICS LETTERS B, Vol: 439, Pages: 225-236, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 19
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Measurement of the Michel parameters and the average tau-neutrino helicity from tau decays at LEP
, PHYSICS LETTERS B, Vol: 438, Pages: 405-416, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 14
-
Journal articleAbbiendi G, Ackerstaff K, Alexander G, et al., 1998,
First measurement of Z/γ* production in Compton scattering of quasi-real photons
, PHYSICS LETTERS B, Vol: 438, Pages: 391-404, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 9
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Upper limit on the lifetime difference of short- and long-lived B<sub>s</sub><SUP>0</SUP> mesons
, PHYSICS LETTERS B, Vol: 438, Pages: 417-429, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 23
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Photon structure functions and azimuthal correlations of lepton pairs in tagged γγ collisions
, PHYSICS LETTERS B, Vol: 438, Pages: 363-378, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 19
-
Journal articleAckerstaff K, Alexander G, Allison J, et al., 1998,
Multi-photon production in e<SUP>+</SUP>e<SUP>-</SUP> collisions at √s=183 GeV
, PHYSICS LETTERS B, Vol: 438, Pages: 379-390, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 8
-
Journal articleHassard J, Liu JH, Mongkolnavin R, et al., 1998,
CVD diamond film for neutron counting
, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 416, Pages: 539-542, ISSN: 0168-9002- Author Web Link
- Cite
- Citations: 8
-
Journal articleAckerstaff K, Alexander G, Allison J, et al., 1998,
Search for Higgs bosons and new particles decaying into two photons at √s=183 GeV
, PHYSICS LETTERS B, Vol: 437, Pages: 218-230, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 17
-
Journal articleAbreu P, Adam W, Adye T, et al., 1998,
π<SUP>±</SUP>, K<SUP>±</SUP>, p and (p)over-bar production in Z<SUP>0</SUP>→q(q)over-bar, Z<SUP>0</SUP>→b(b)over-bar, Z<SUP>0</SUP>→u(u)over-bar,d(d)over-bar,s(s)over-bar
, EUROPEAN PHYSICAL JOURNAL C, Vol: 5, Pages: 585-620, ISSN: 1434-6044- Author Web Link
- Cite
- Citations: 118
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Test of CP invariance in Z→μ<SUP>+</SUP>μ<SUP>-</SUP>γ decay
, PHYSICS LETTERS B, Vol: 436, Pages: 428-436, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 5
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Study of the hadronic photon structure function F<sub>2</sub><SUP>γ</SUP> at LEP
, PHYSICS LETTERS B, Vol: 436, Pages: 403-416, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 63
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Search for neutral Higgs bosons of the minimal supersymmetric standard model in e<SUP>+</SUP>e<SUP>-</SUP> interactions at √s = 130-183 GeV
, PHYSICS LETTERS B, Vol: 436, Pages: 389-402, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 15
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Measurement of W-pair cross sections in e<SUP>+</SUP>e<SUP>-</SUP> interactions at √s = 183 GeV and W-decay branching fractions
, PHYSICS LETTERS B, Vol: 436, Pages: 437-452, ISSN: 0370-2693- Author Web Link
- Cite
- Citations: 22
-
Journal articleAcciari M, Adriani O, Aguilar-Benitez M, et al., 1998,
Test of CP invariance in Z → μ<sup>+</sup> μ<sup>-</sup> γ decay
, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol: 436, Pages: 428-436, ISSN: 0370-2693We report on the first test of CP invariance in Z decays with hard photon radiation. The data recorded with the L3 detector at centre-of-mass energies near the Z resonance are used to search for CP violation in the reaction e+e-→μ+μ-γ. No evidence for CP violation is found and limits on the CP-violating form factors fμA and fμV are derived. © 1998 Elsevier Science B.V. All rights reserved.
-
Journal articleAcciarri M, Adriani O, Aguilar-Benitez M, et al., 1998,
Study of the hadronic photon structure function F<sup>γ</sup><inf>2</inf> at LEP
, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol: 436, Pages: 403-416, ISSN: 0370-2693The hadronic photon structure function Fγ2 is studied in the reaction e+e-→e+e- hadrons at LEP with the L3 detector. The data, collected from 1991 to 1995 at a centre-of-mass energy √s ≃ 91 GeV, correspond to an integrated luminosity of 140 pb-1. The photon structure function Fγ2 is measured in the Q2 interval 1.2 GeV2 ≤ Q2 ≤ 9.0 GeV2 and the x interval 0.002 < × < 0.2. Fγ2 shows a linear growth with lnQ2. The value of the slope α-1dFγ2(Q2)/dlnQ 2 is measured to be 0.079 ± 0.011 ± 0.009. © 1998 Elsevier Science B.V. All rights reserved.
This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.