Abstract
The diffractive production of ρ0(770 @#@) mesons in muon-proton interactions is studied in the kinematic region 0.15 GeV2 < Q2 < 20 GeV2 and 20 GeV < ? < 420 GeV. The data were obtained in the Fermilab fixed-target experiment E665 with primary muons of 470 GeV energy. Results are presented on the Q2, x and ? dependence of the cross section, on the shape of the ρ+ρt - mass spectrum, on the slope of the diffraction peak and on the production and decay angular distributions of the ρ0(770). The cross section for diffractive production of ρ0 by virtual photons on protons depends mainly on Q2. At fixed Q2, no significant dependence on x or ? is observed. The extrapolation to Q2 = 0 yields a photoproduction cross section of (10.30 ± 0.33) μb. The slope of the t′ distribution has a value of (7.0 ± 0.2) GeV−2, with a tendency to decrease as Q2 increases. The production and decay angular distributions of the ρ0 depend strongly on Q2 and are consistent with s-channel helicity conservation. The ratio R = σ l /σ t deduced from the decay angular distributions rises strongly with Q2, passing the value of 1 at Q2 ≈ 2 GeV2.
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References
J. Park et al., Nucl. Phys. B36 (1972) 404
R.M. Egloff et al., Phys. Rev. Lett 43 (1979) 657
D. Aston et al., Nucl. Phys. B209 (1982) 56
T.J. Chapin et al., Phys. Rev. D31 (1985) 17
M. Derrick et al. (ZEUS), Z. Phys. C63 (1994) 391
M. Derrick et al. (ZEUS), Z. Phys. C69 (1995) 39
S. Aïd et al. (H1), Nucl. Phys. B463 (1996) 3
M. Derrick et al. (ZEUS), DESY 96-183, Aug. 1996
ZEUS Collaboration, pa 02-050, Contribution to the XXVIII Conference on High Energy Physics, Warsaw, 1996
J.T. Dakin et al., Phys. Rev. D8 (1973) 687
J. Ballam et al., Phys. Rev. D10 (1974) 765
P. Joos et al., Nucl. Phys. B113 (1976) 53
D.G. Cassel et al., Phys. Rev. D24 (1981) 2787
I. Cohen et al., Phys. Rev. D25 (1982) 634
M. Derrick et al. (ZEUS), Phys. Lett. B356 (1995) 601
S. Aïd et al. (H1), Nucl. Phys. B468 (1996) 3
O. Lukina (ZEUS), pa 02-053, Contribution to the XXVIII Conference on High Energy Physics, Warsaw, 1996
J. Bulmahn (ZEUS), pa 02-028, Contribution to the XXVIII Conference on High Energy Physics, Warsaw, 1996
P.R. Newman et al. (H1), DESY 96-162, Aug. 1996
W.R. Francis et al., Phys. Rev. Lett. 38 (1977) 633
C. Del Papa et al., Phys. Rev. D19 (1979) 1303
W.D. Shambroom et al. (CHIO), Phys. Rev. D26 (1982) 1
J.J. Aubert et al. (EMC), Phys. Lett. 161B (1985) 203
J. Ashman et al. (EMC), Z. Phys. C39 (1988) 169
P. Amaudruz et al. (NMC), Z. Phys. C54 (1992) 239
M. Arneodo et al. (NMC), Nucl. Phys. B429 (1994) 503
M. Arneodo et al. (NMC), Il Nuovo Cim. 108A (1995) 1247
T.H. Bauer et al., Rev. Mod. Phys. 50 (1978) 261
A. Donnachie and P.V. Landshoff, Phys. Lett. B185 (1987) 403
I.F. Ginzburg et al., “Semihard quasi diffractive production of neutral mesons by off shell photons”, to appear in Nucl. Phys. B
J. Nemchik et al. Phys. Lett. B341 (1994) 228
S.J. Brodsky et al., Phys. Rev. D50 (1994) 3134
L. Frankfurt et al., Phys. Rev. D54 (1996) 3194
J. Nemchik et al., DFTT71/95, KFA-IKP (TH)-24-95, hep-ph/9605231
A. Donnachie and P.V. Landshoff, Nucl. Phys. B311 (1989) 509
J.R. Cudell, Nucl. Phys. B336 (1990) 1
A. Donnachie and P.V. Landshoff, Phys. Lett. B348 (1995) 213
M.A. Pichowsky and T.-S.H. Lee, Phys. Lett. B379 (1996) 1
M.A. Pichowsky and T.-S.H. Lee, ANL-PHY-8529-TH-96,nuclth/9612049
L.P.A. Haakman et al., NIKHEF 95-033, hep-ph/9507394
M.R. Adams et al., Nucl. Inst. and Meth. A291 (1990) 533
K. Goulianos, Phys. Rep. 101 (1983) 169
M.R. Adams et al., Phys. Rev. D54 (1996) 3006
A. Arvidson and B. Badelek, The GAMRAD program, NMC/92/5 (1992)
L.W. Mo and Y.S. Tsai, Rev. Mod. Phys. 41 (1969) 205
Y.S. Tsai, SLAC-PUB-848 (1971)
R. Brun et al. GEANT: User guide and reference manual, CERN-DD/78/2 (1978)
A. Donnachie and P.V. Landshoff, Z. Phys. C61 (1994) 139
L.W. Whitlow et al., Phys. Lett. B250 (1990) 193
G. Ingelman, The Lund Monte Carlo for deep-inelastic lepton nucleon scattering (1983)
T. Sjöstrand, Comp. Phys. Comm. 39 (1986) 347
H. Fraas and D. Schildknecht, Nucl. Phys. B14 (1969) 543
N.N. Nikolaev et al., Z. Phys. A351 (1995) 435
H. Holtmann et al., Z. Phys. C69 (1996) 297
V. Del Duca at al., DESY 96-179, Aug. 1996
Y. Akimov et al., Phys. Rev. D14 (1976) 3148
L. Montanet et al., Phys. Rev. D50 (1994) 1177
L. van Hove, Phys. Lett. 28B (1969) 429
L. van Hove, Nucl. Phys. B9 (1969) 331
M. Deutschmann, Proc. of the Amsterdam Int. Conf on Elementary Particles, Eds. A.G. Tenner, M.J.G. Veltman (1972) 153
N.N. Nikolaev et al., Z. Phys. C53 (1992) 331
R.L. Cool et al., Phys. Rev. Lett. 48 (1982) 1451
M.R. Adams et al., Z. Phys. C71 (1996) 391
P. Söding, Phys. Lett. 19 (1966) 702
R. Ross and L. Stodolsky, Phys. Rev. 149 (1966) 1172
J. Pumplin, Phys. Rev. D2 (1970) 1859
G. Niesler et al., Phys. Lett. B389 (1996) 157
L.M. Barkov et al., Nucl. Phys. B256 (1985) 365
R. Spital and D.R. Yennie, Phys. Rev. D9 (1974) 126
L.N. Hand, Phys. Rev. 129 (1963) 1834
G.A. Schuler and T. Sjöstrand, Phys. Lett. B300 (1993) 169
G.A. Schuler and T. Sjöstrand, Nucl. Phys. B407 (1993) 539
B.Z. Kopeliovich et al., Phys. Lett. B309 (1993) 179
B.Z. Kopeliovich et al., Phys. Lett. B324 (1994) 469
M.R. Adams et al., Phys. Rev. Lett. 74 (1995) 1525
N.N. Nikolaev et al., Phys. Lett. B366 (1996) 337
K. Schilling and G. Wolf, Nucl. Phys. B61 (1973) 381
A.J. Malensek, private communication
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E665 Collaboration., Adams, M.R., Aderholz, M. et al. Diffractive production of ρ0(770) mesons in muon-proton interactions at 470 GeV. Z Phys C - Particles and Fields 74, 237–261 (1997). https://doi.org/10.1007/s002880050386
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DOI: https://doi.org/10.1007/s002880050386