-
1
-
-
0037505295
-
-
M. Glück, E. Reya, M. Stratmann, and W. Vogelsang, Phys Rev. D 53, 4775 (1996)
-
(1996)
Phys Rev. D
, vol.53
, pp. 4775
-
-
Glück, M.1
Reya, E.2
Stratmann, M.3
Vogelsang, W.4
-
4
-
-
0031558097
-
-
G. Altarelli, R. D. Bail, S. Forte, and G. Ridolfi, Nticl Phys. B496, 337 (1997);
-
(1997)
Nticl Phys.
, vol.B496
, pp. 337
-
-
Altarelli, G.1
Bail, R.D.2
Forte, S.3
Ridolfi, G.4
-
5
-
-
33744534813
-
-
Acta Phys. Pol. B 29, 1145 (1998).
-
(1998)
Acta Phys. Pol. B
, vol.29
, pp. 1145
-
-
-
6
-
-
0041158818
-
-
SLAC-E154 Collaboration, K. Abe et al, Phys. Lett. B 405 180(1997).
-
(1997)
Phys. Lett. B
, vol.405
, pp. 180
-
-
Abe, K.1
-
7
-
-
0542373834
-
-
CERN-SM Collaboration, B. Adeva et al, Phys. Rev. D 58 112002(1998)
-
(1998)
Phys. Rev. D
, vol.58
, pp. 112002
-
-
Adeva, B.1
-
8
-
-
0032385047
-
-
C. Bourrely, F. Buccella, O. Pisanti, P. Santorelli, and J. Soffer, Prog. Theor. Phys. 99, 1017 (1998).
-
(1998)
Prog. Theor. Phys.
, vol.99
, pp. 1017
-
-
Bourrely, C.1
Buccella, F.2
Pisanti, O.3
Santorelli, P.4
Soffer, J.5
-
11
-
-
0542421279
-
-
Phys. Rev. D 58, 114028 (1998)
-
(1998)
Phys. Rev. D
, vol.58
, pp. 114028
-
-
-
12
-
-
33750647838
-
-
Phys. Lett. B 4-15, 232 (1998);
-
(1998)
Phys. Lett. B
, vol.4-15
, pp. 232
-
-
-
13
-
-
0009034731
-
-
462, 189 (1999);
-
(1999)
Phys. Lett. B
, vol.462
, pp. 189
-
-
-
14
-
-
0034618415
-
-
488, 283 (2000).
-
(2000)
Phys. Lett. B
, vol.488
, pp. 283
-
-
-
16
-
-
33750656626
-
-
SLAC-E154/155 Collaboration, S. Incerti and F. Sabatie CEA-Saclay PCCF-RI-9901, 1999
-
SLAC-E154/155 Collaboration, S. Incerti and F. Sabatie CEA-Saclay PCCF-RI-9901, 1999.
-
-
-
-
17
-
-
0001637003
-
-
J. Bartelski and S. Tatur, hep-ph/0004251
-
S. Tatur, J. Bartelski, and M. Kurzela, Acta Phys. Pol. B 31 647 (2000); J. Bartelski and S. Tatur, hep-ph/0004251.
-
(2000)
Acta Phys. Pol. B
, vol.31
, pp. 647
-
-
Tatur, S.1
Bartelski, J.2
Kurzela, M.3
-
19
-
-
17044382150
-
-
Asymmetry Analysis Collaboration, Y. Goto et al, Phys. Rev D 62, 034017 (2000)
-
(2000)
Phys. Rev D
, vol.62
, pp. 034017
-
-
Goto, Y.1
-
21
-
-
4244079350
-
-
SLAC-Yale E80 Collaboration, M. J. Alguard et al, Phys Rev. Lett. 37, 1261 (1976);
-
(1976)
Phys Rev. Lett.
, vol.37
, pp. 1261
-
-
Alguard, M.J.1
-
23
-
-
4243852436
-
-
SLAC-Yale-El30 Collaboration, G. Baum et al, ibid 51, 1135 (1983).
-
(1983)
Phys Rev. Lett.
, vol.51
, pp. 1135
-
-
Baum, G.1
-
24
-
-
4244029003
-
-
CERN-EM Collaboration, J. Ashman et al, Phys. Lett. B 206 364 (1988);
-
(1988)
Phys. Lett. B
, vol.206
, pp. 364
-
-
Ashman, J.1
-
25
-
-
4243758237
-
-
Nucl. Phys. B328, 1 (1989).
-
(1989)
Nucl. Phys.
, vol.B328
, pp. 1
-
-
-
26
-
-
0542421341
-
-
CERN-SM Collaboration, B. Adeva et al, Phys. Rev. D 58 112001 (1998).
-
(1998)
Phys. Rev. D
, vol.58
, pp. 112001
-
-
Adeva, B.1
-
27
-
-
4243780708
-
-
SLAC-E143 Collaboration, K. Abe et al, Phys. Rev. D 58 120003 (1998).
-
(1998)
Phys. Rev. D
, vol.58
, pp. 120003
-
-
Abe, K.1
-
28
-
-
2842550439
-
-
SLAC-E142 Collaboration, P. L. Anthony et al, Phys. Rev. 54, 6620 (1996).
-
(1996)
Phys. Rev.
, vol.54
, pp. 6620
-
-
Anthony, P.L.1
-
29
-
-
0039968183
-
-
DES Y-HERMES Collaboration, K. Ackerstaff et al, Phys Lett. B 404, 383 (1997).
-
(1997)
Phys Lett. B
, vol.404
, pp. 383
-
-
Ackerstaff, K.1
-
30
-
-
0346549997
-
-
DES Y-HERMES Collaboration, A. Airapetian et al, Phys Lett. B 442, 484 (1998).
-
(1998)
Phys Lett. B
, vol.442
, pp. 484
-
-
Airapetian, A.1
-
31
-
-
7244240884
-
-
SLAC-E154 Collaboration, K. Abe et al, Phys. Rev. Lett. 79 26 (1997).
-
(1997)
Phys. Rev. Lett.
, vol.79
, pp. 26
-
-
Abe, K.1
-
32
-
-
4444278952
-
-
SLAC-E155 Collaboration, P. L. Anthony et al, Phys. Lett. 463, 339 (1999).
-
(1999)
Phys. Lett.
, vol.463
, pp. 339
-
-
Anthony, P.L.1
-
33
-
-
0002721308
-
-
SLAC-E155 Collaboration, P. L. Anthony et al, Phys. Lett. 493, 19 (2000)
-
(2000)
Phys. Lett.
, vol.493
, pp. 19
-
-
Anthony, P.L.1
-
37
-
-
0008662280
-
-
CTEQ5 Collaboration, H. L. Lai et al, Eur. Phys. J. C 12, 375 (2000)
-
(2000)
Eur. Phys. J. C
, vol.12
, pp. 375
-
-
Lai, H.L.1
-
39
-
-
0000337973
-
-
For recent reviews see, for example, S. Kumano, Phys. Rep. 303, 183 (1998);
-
(1998)
Phys. Rep.
, vol.303
, pp. 183
-
-
Kumano, S.1
-
52
-
-
33750655292
-
-
note
-
Note that our ansatz violates (slightly) the helicity retention concept developed in Ref.
-
-
-
-
53
-
-
33750646362
-
-
note
-
by which of(x,Q2)/f(x,Q2) -> 1 for .v-> 1. Such relations follow in perturbative QCD and need not necessarily be fulfilled by our nonperturbative input at Q- = fjr. In any case, we could always appropriately modify our ansatz at very high x so as to satisfy the helicity retention conditions. Enforcing in our fits all βf to vanish in Eq. (2.6) increases the total \2 by several units, giving rise to worse fits than our optimal ones
-
-
-
-
54
-
-
0001429536
-
-
We have refrained from attempting to extract information from measurements of the spin asymmetry for photoproduction of oppositely charged hadron pairs presented by the HERMES collaboration [A. Airapetian et al., Phys. Rev. Lett. 84, 2584 (2000)J. Such data could in principle constrain the spin gluon density Sg(x,Q2); however, the smallness of the hadron transverse momenta accessed in this experiment makes an interpretation of the data in terms of QCD hard scattering difficult. In fact, as stated by the HERMES Kollaboration, their published gluon asymmetry <%(.t,β2)/g(.v,β2) = 0.41±0.18 at .r-0.17 and Qi=(p\) = 1.\ GeV2, which implies .v<5s(.r,β2)=0.35 ±0.15, actually compatible with our results in Fig. 5, does not include systematic theoretical errors. These could be sizeable in the low transverse momentum region considered
-
(2000)
Phys. Rev. Lett.
, vol.84
, pp. 2584
-
-
Airapetian, A.1
-
56
-
-
33750675848
-
-
Phys. Rev. D l, 1376 (1970)
-
(1970)
Phys. Rev. D
, vol.50
, pp. 1376
-
-
-
58
-
-
1542747889
-
-
Phys. Lett. B 427, 371 (1998). The explicit transformation of the splitting functions (anomalous dimensions) and coefficient functions from the MS to the CI (JET) scheme can be found in this latter reference as well as in the third reference of Ref. [8J
-
(1998)
Phys. Lett. B
, vol.427
, pp. 371
-
-
-
60
-
-
34250235244
-
-
CDHSW Collaboration, H. Abramowicz et ai, Z. Phys. C 15, 19 (1982). 3
-
(1982)
Z. Phys. C
, vol.15
, pp. 19
-
-
Abramowicz, H.1
-
61
-
-
4243757371
-
-
CCFR Collaboration, C. Foudas et al., Phys. Rev. Lett. 64, 1207 (1990);
-
(1990)
Phys. Rev. Lett.
, vol.64
, pp. 1207
-
-
Foudas, C.1
-
65
-
-
2842606795
-
-
337, 157 (1994);
-
(1994)
Phys. Lett. B
, vol.337
, pp. 157
-
-
-
67
-
-
0041361449
-
-
NA51 Collaboration, A. Baldit et al., Phys. Lett. B 332, 244 (1994);
-
(1994)
Phys. Lett. B
, vol.332
, pp. 244
-
-
Baldit, A.1
-
69
-
-
0033236213
-
-
Proceedings of DIS '99
-
HERMES Collaboration, C. A. Miller, Proceedings of DIS '99, Nucl. Phys. B (Free. Suppl.) 79, 146 (1999)
-
(1999)
Nucl. Phys. B (Free. Suppl.)
, vol.79
, pp. 146
-
-
Miller, C.A.1
-
71
-
-
0034689927
-
-
B. Dressler étal., Univ. Bochum RUB-TPII-13/99, hep-ph/9910464
-
S. Kumano and M. Miyama, Phys. Lett. B 479, 149 (2000); B. Dressler étal., Univ. Bochum RUB-TPII-13/99, hep-ph/9910464;
-
(2000)
Phys. Lett. B
, vol.479
, pp. 149
-
-
Kumano, S.1
Miyama, M.2
-
73
-
-
0042677227
-
-
Nucl. Phys. B423, 329 (1994)
-
(1994)
Nucl. Phys.
, vol.B423
, pp. 329
-
-
-
76
-
-
33750674911
-
-
note
-
The easiest and most consistent way to implement directly (even for Mellin-« moments) the constraint (3.5) in a fit routine is to fit, for example, Su, 3d, and Su according to the ansatz (2.6) which fix Sd(x,fi2) via Eqs. (3.5) and (3.4): Sd/d=(Su/it)(Sîî/îî)/(ôd/d) where the unpolarized densities are taken from Ref. [25J. Thus Nj=NuNj/Nd, aj=au + aj -ad, andβj=βu+βs-βd
-
-
-
-
78
-
-
0000157436
-
-
Phys. Rev. D 56, 4069 (1997);
-
(1997)
Phys. Rev. D
, vol.56
, pp. 4069
-
-
-
79
-
-
16444367493
-
-
K. Goeke et al., Univ. Bochum RUB-TPII-18 99, hep-ph/0001272
-
M. Wakamatsu and T. Kubota, ibid. 60, 034020 (1999); K. Goeke et al., Univ. Bochum RUB-TPII-18 99, hep-ph/0001272.
-
(1999)
Phys. Rev. D
, vol.60
, pp. 034020
-
-
Wakamatsu, M.1
Kubota, T.2
-
83
-
-
33750643169
-
-
Nucl. Phys. A680, 62 (2000);
-
(2000)
Nucl. Phys.
, vol.A680
, pp. 62
-
-
-
86
-
-
0038901078
-
-
HERMES Collaboration, K. Ackerstaff et al., Phys. Lett. 464, 123 (1999).
-
(1999)
Phys. Lett.
, vol.464
, pp. 123
-
-
Ackerstaff, K.1
|