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Polarised quark distributions in the nucleon from semi-inclusive spin asymmetries

Authors :
F. Tessarotto
F. Perrot-Kunne
W. Kröger
E. Burtin
K. Zaremba
Jay Roberts
J. Cranshaw
T. Matsuda
M. Plo
I. Sabo
M. Grosse Perdekamp
A. Karev
K. Haft
V. G. Krivokhijine
S. K. Dhawan
J. Lichtenstadt
S. Platchkov
N. de Botton
Victor Kukhtin
H. Gilly
M. Lamanna
J. H. Moromisato
Clemens A. Heusch
J. S. McCarthy
G. Igo
A. Steinmetz
Patrick Hautle
S. Bültmann
R. Birsa
F. Feinstein
D. von Harrach
J. E.J. Oberski
Takahiro Iwata
A. Ogawa
A. Schiller
D. Thers
Yu. Kisselev
G. Reicherz
D. Crabb
J. A. Garzon
C. Dulya
Naoaki Horikawa
Franco Bradamante
T. Akdogan
B. Roscherr
S. Dalla Torre
H. J. Kessler
G. Bardin
L. Betev
Roland Windmolders
J. Martino
Abhay Deshpande
C. S. Özben
M. Velasco
A. Arvidson
Rudiger Voss
J. Nassalski
M. Giorgi
U. Stiegler
T. Hasegawa
I.A. Savin
D. J. Miller
P. Schiavon
Andrea Bressan
Michal Szleper
A. Gallas
G. K. Mallot
J. Vogt
E. Arik
B. W. Mayes
T. O. Niinikoski
S. Ishimoto
Lawrence Pinsky
A. Witzmann
Y. Miyachi
St. Goertz
F. Lehar
G. Unel
B. Frois
H. Postma
R. van Dantzig
Matias Rodriguez
E. P. Sichtermann
F. Simeoni
G.I. Smirnov
J. Saborido
R. Puntaferro
D. Fasching
G. van Middelkoop
Jinkui Zhao
D. Pose
W. Meyer
Kunikazu Mori
C. A. Whitten
J. Kyynäräinen
A. de Lesquen
J. Pretz
K. Medved
Regine Willumeit
H. Pereira
W. Tlaczala
A. Tripet
G. Gracia
A. Sandacz
N. De Groot
K. Kurek
Anna Zanetti
F. Marie
T. Kageya
A. Rijllart
Bernardo Adeva
E. Rondio
T. Çuhadar
J. M. Le Goff
Heinrich B. Stuhrmann
A. Magnon
J. Ylöstalo
L. Naumann
M. Litmaath
Günter Baum
P. Berglund
B. Derro
E. von Goeler
D. Krämer
W. Wislicki
G. Rädel
S. Eichblatt
Alan D. Martin
B. Badelek
C. Fernandez
N. Hayashi
D. Peshekhonov
A. Bravar
V. W. Hughes
Ulrich Landgraf
A. Staude
T. J. Ketel
S. Forthmann
J. Kiryluk
E. M. Kabuß
(Astro)-Particles Physics
B., Adeva
T., Akdogan
E., Arik
A., Arvidson
B., Badelek
G., Bardin
G., Baum
P., Berglund
L., Betev
R., Birsa
N., de Botton
Bradamante, Franco
A., Bravar
Bressan, Andrea
S., Bültmann
E., Burtin
D., Crabb
J., Cranshaw
T., Çuhadar
DALLA TORRE, Silvia
R., van Dantzig
B., Derro
A., Deshpande
S., Dhawan
C., Dulya
S., Eichblatt
D., Fasching
F., Feinstein
C., Fernandez
S., Forthmann
B., Froi
A., Galla
J. A., Garzon
H., Gilly
Giorgi, Marcello
E., von Goeler
S., Goertz
G., Gracia
N., de Groot
M., Grosse Perdekamp
K., Haft
D., von Harrach
T., Hasegawa
P., Hautle
N., Hayashi
C. A., Heusch
N., Horikawa
V. W., Hughe
G., Igo
S., Ishimoto
T., Iwata
E. M., Kabuß
T., Kageya
A., Karev
H. J., Kessler
T. J., Ketel
J., Kiryluk
Kisselev, Y. u.
D., Krämer
V., Krivokhijine
W., Kröger
V., Kukhtin
K., Kurek
J., Kyynäräinen
M., Lamanna
U., Landgraf
J. M., Le Goff
F., Lehar
A., de Lesquen
J., Lichtenstadt
M., Litmaath
A., Magnon
G. K., Mallot
F., Marie
Martin, Anna
J., Martino
T., Matsuda
B., Maye
J. S., Mccarthy
K., Medved
W., Meyer
G., van Middelkoop
D., Miller
Y., Miyachi
K., Mori
J., Moromisato
J., Nassalski
L., Naumann
T. O., Niinikoski
J. E. J., Oberski
A., Ogawa
C., Ozben
H., Pereira
F., Perrot Kunne
D., Peshekhonov
L., Pinsky
S., Platchkov
M., Plo
D., Pose
H., Postma
J., Pretz
R., Puntaferro
G., Rädel
A., Rijllart
G., Reicherz
J., Robert
M., Rodriguez
E., Rondio
B., Roscherr
I., Sabo
J., Saborido
A., Sandacz
I., Savin
Schiavon, Paolo
A., Schiller
E. P., Sichtermann
F., Simeoni
G. I., Smirnov
A., Staude
A., Steinmetz
U., Stiegler
H., Stuhrmann
M., Szleper
F., Tessarotto
D., Ther
W., Tlaczala
A., Tripet
G., Unel
M., Velasco
J., Vogt
R., Vo
C., Whitten
R., Windmolder
R., Willumeit
W., Wislicki
A., Witzmann
J., Ylöstalo
Zanetti, ANNA MARIA
K., Zaremba
J., Zhao
Source :
Adeva, B, Ketel, T J, van Middelkoop, G & Sichterman, E P 1998, ' Polarized quark distributions in the nucleon from semi-inclusive spin-asymmetries. ', Physics Letters B, vol. 420, pp. 180-190 . https://doi.org/10.1016/S0370-2693(97)01546-3, Physics Letters B, 420, 180-190. Elsevier, Scopus-Elsevier, Adeva, B, Akdogan, T, Arik, E, Arvidson, A, Badelek, B, Bardin, G, Baum, G, Berglund, P, Betev, L, Birsa, R, de Botton, N, Bradamante, F, Bravar, A, Bressan, A, Bültmann, S, Burtin, E, Crabb, D, Cranshaw, J, Çuhadar, T, Dalla Torre, S, van Dantzig, R, Derro, B, Deshpande, A, Dhawan, S, Dulya, C, Eichblatt, S, Fasching, D, Feinstein, F, Fernandez, C, Forthmann, S, Frois, B, Gallas, A, Garzon, J A, Gilly, H, Giorgi, M, von Goeler, E, Goertz, S, Gracia, G, de Groot, N, Grosse Perdekamp, M, Haft, K, von Harrach, D, Hasegawa, T, Hautle, P, Hayashi, N, Heusch, C A, Horikawa, N, Hughes, V W, Igo, G, Ishimoto, S, Iwata, T, Kabuß, E M, Kageya, T, Karev, A, Kessler, H J, Ketel, T J, Kiryluk, J, Kisselev, Y, Krämer, D, Krivokhijine, V, Kröger, W, Kukhtin, V, Kurek, K, Kyynäräinen, J, Lamanna, M, Landgraf, U, Le Goff, J M, Lehar, F, de Lesquen, A, Lichtenstadt, J, Litmaath, M, Magnon, A, Mallot, G K, Marie, F, Martin, A, Martino, J, Matsuda, T, Mayes, B, McCarthy, J S, Medved, K, Meyer, W, van Middelkoop, G, Miller, D, Miyachi, Y, Mori, K, Moromisato, J, Nassalski, J, Naumann, L, Niinikoski, T O, Oberski, J E J, Ogawa, A, Ozben, C, Pereira, H, Perrot-Kunne, F, Peshekhonov, D, Pinsky, L, Platchkov, S, Plo, M, Pose, D & Postma, H 1998, ' Polarised quark distributions in the nucleon from semi-inclusive spin asymmetries ', Physics Letters Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 420, no. 1-2, pp. 180-190 . https://doi.org/10.1016/S0370-2693(97)01546-3
Publication Year :
1998
Publisher :
Elsevier BV, 1998.

Abstract

We present a measurement of semi-inclusive spin asymmetries for positively and negatively charged hadrons from deep inelastic scattering of polarised muons on polarised protons and deuterons in the range $0.003$1 GeV$^2$. Compared to our previous publication on this subject, with the new data the statistical errors have been reduced by nearly a factor of two. From these asymmetries and our inclusive spin asymmetries we determine the polarised quark distributions of valence quarks and non-strange sea quarks at $Q^2$=10 GeV$^2$. The polarised $u$ valence quark distribution, $\Delta u_v(x)$, is positive and the polarisation increases with $x$. The polarised $d$ valence quark distribution, $\Delta d_v(x)$, is negative and the non-strange sea distribution, $\Delta \bar q(x)$, is consistent with zero over the measured range of $x$. We find for the first moments $\int_0^1 \Delta u_v(x) dx = 0.77 \pm 0.10 \pm 0.08$, $\int_0^1 \Delta d_v(x) dx = -0.52 \pm 0.14 \pm 0.09$ and $\int_0^1 \Delta \bar q(x) dx= 0.01 \pm 0.04 \pm 0.03$, where we assumed $\Delta \bar u(x) = \Delta \bar d(x)$. We also determine for the first time the second moments of the valence distributions $\int_0^1 x \Delta q_v(x) dx$.<br />Comment: 17 pages

Details

ISSN :
03702693
Volume :
420
Database :
OpenAIRE
Journal :
Physics Letters B
Accession number :
edsair.doi.dedup.....17f93f2d4c7ad6edf81540922f362235