E-resources
-
Amoroso, A.; Andrieux, V.; Azevedo, C.; Badelek, B.; Barth, J.; Beck, R.; Bedfer, Y.; Bernhard, J.; Birsa, R.; Bisplinghoff, J.; Boer, M.; Bordalo, P.; Bradamante, F.; Braun, C.; Bressan, A.; Burtin, E.; Capozza, L.; Chang, W. -C; Chiosso, M.; Cicuttin, A.; Curiel, Q.; Dalla Torre, S.; Dasgupta, S.; Donskov, S. V.; Eversheim, P. D.; Eyrich, W.; Ferrero, A.; Friedrich, J. M.; Frolov, V.; Fuchey, E.; Giordano, F.; Gnesi, I.; Grabmueller, S.; Grube, B.; Guskov, A.; von Harrach, D.; Hashimoto, R.; Heinsius, F. H.; Ishimoto, S.; Ivanov, A.; Ivanshin, Yu; Jary, V.; Joosten, R.; Kabuss, E.; Koivuniemi, J. H.; Kondo, K.; Koenigsmann, K.; Kouznetsov, O.; Kremser, P.; Krinner, F.; Kurek, K.; Lednev, A. A.; Lehmann, A.; Makke, N.; Mallot, G. K.; Marchand, C.; Matousek, J.; Matsuda, T.; Michigami, T.; Miyachi, Y.; Nagaytsev, A.; Neyret, D.; Nikolaenko, V. I.; Nunes, A. S.; Olshevsky, A. G.; Orlov, I.; Ostrick, M.; Peng, J. -C; Peshekhonov, D. V.; Pochodzalla, J.; Polyakov, V. A.; Pretz, J.; Quaresma, M.; Quintans, C.; Regali, C.; Reicherz, G.; Rossiyskaya, N. S.; Sandacz, A.; Santos, C.; Sarkar, S.; Sbrizzai, G.; Schmidt, K.; Schmieden, H.; Schönning, Karin; Selyunin, A.; Silva, L.; Sozzi, F.; Stolarski, M.; Sulc, M.; Suzuki, H.; Szabelski, A.; Szameitat, T.; Sznajder, P.; ter Wolbeek, J.; Tessarotto, F.; Thibaud, F.; Tskhay, V.; Virius, M.; Wilfert, M.; Ziembicki, M.
Physics letters. B, 02/2016, Volume: 753Journal Article
New results for the double spin asymmetry A(1)(p) and the proton longitudinal spin structure function g(1)(p) are presented. They were obtained by the COMPASS Collaboration using polarised 200 GeV muons scattered off a longitudinally polarised NH3 target. The data were collected in 2011 and complement those recorded in 2007 at 160 GeV, in particular at lower values of x. They improve the statistical precision of g(1)(p)(x) by about a factor of two in the region x less than or similar to 0.02. A next-to-leading order QCD fit to the g(1) world data is performed. It leads to a new determination of the quark spin contribution to the nucleon spin, Delta Sigma, ranging from 0.26 to 0.36, and to a re-evaluation of the first moment of g(1)(p). The uncertainty of Delta Sigma is mostly due to the large uncertainty in the present determinations of the gluon helicity distribution. A new evaluation of the Bjorken sum rule based on the COMPASS results for the non-singlet structure function g(1)(NS) (x, Q(2)) yields as ratio of the axial and vector coupling constants vertical bar gA/gV vertical bar = 1.22 +/- 0.05 (stat.) +/- 0.10 (syst.), which validates the sum rule to an accuracy of about 9%.
Author
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.