Measurement of the spin-dependent structure function g1(x) of the proton

D. Adams; B. Adeva; E. Arik; A. Arvidson; B. Badelek; M. K. Ballintijn; G. Bardin; G. Baum; P. Berglund; L. Betev; I. G. Bird; R. Birsa; P. Björkholm; B. E. Bonner; N. de Botton; F. Bradamante; A. Bressan; A. Brüll; S. Bültmann; E. Burtin; C. Cavata; M. Clocchiatti; M. D. Corcoran; D. Crabb; J. Cranshaw; M. Crawford; T. Çuhadar; S. Dalla Torre; R. van Dantzig; S. Dhawan; C. Dulya; A. Dyring; S. Eichblatt; J. C. Faivre; D. Fasching; F. Feinstein; C. Fernandez; B. Frois; J. A. Garzon; T. Gaussiran; M. Giorgi; E. von Goeler; G. Gracia; N. de Groot; M. Grosse Perdekamp; E. Gülmez; D. von Harrach; T. Hasegawa; P. Hautle; N. Hayashi; C. A. Heusch; N. Horikawa; V. W. Hughes; G. Igo; S. Ishimoto; T. Iwata; E. M. Kabuß; R. Kaiser; A. Karev; H. J. Kessler; T. J. Ketel; A. Kishi; Yu Kisselev; L. Klostermann; D. Krämer; V. Krivokhijine; V. Kukhtin; J. Kyynäräinen; M. Lamanna; U. Landgraf; K. Lau; T. Layda; M. J. Le Goff; F. Lehar; A. de Lesquen; J. Lichtenstadt; T. Lindqvist; M. Litmaath; S. Lopez-Ponte; M. Lowe; A. Magnon; G. K. Mallot; F. Marie; A. Martin; J. Martino; T. Matsuda; B. Meyes; J. S. McCarthy; K. Medved; G. van Middelkoop; D. Miller; K. Mori; J. Moromisato; A. Nagaitsev; J. Nassalski; L. Naumann; T. O. Niinikoski; J. E J Oberski; D. P. Parks; A. Penzo; C. Perez; F. Perrot-Kunne; D. Peshekhonov; R. Piegaia; L. Pinsky; S. Platchkov; M. Plo; D. Pose; H. Postma; J. Pretz; T. Pussieux; J. Pyrlik; I. Reyhancan; J. M. Rieubland; A. Rijllart; J. B. Roberts; S. Rock; M. Rodriguez; E. Rondio; A. Rosado; I. Sabo; J. Saborido; A. Sandacz; I. Savin; P. Schiavon; K. P. Schüler; R. Segel; R. Seitz; Y. Semertzidis; F. Sever; P. Shanahan; N. Shumeiko; G. Smirnov; A. Staude; A. Steinmetz; U. Stiegler; H. Stuhrmann; K. M. Teichert; F. Tessarotto; M. Velasco; J. Vogt; R. Voss; R. Weinstein; C. Whitten; R. Windmolders; R. Willumeit; W. Wislicki; A. Witzmann; A. M. Zanetti; J. Zhao

doi:10.1016/0370-2693(94)90793-5

Measurement of the spin-dependent structure function g₁(x) of the proton

D. Adams^*, B. Adeva, E. Arik, A. Arvidson, B. Badelek, M. K. Ballintijn, G. Bardin, G. Baum, P. Berglund, L. Betev, I. G. Bird, R. Birsa, P. Björkholm, B. E. Bonner, N. de Botton, F. Bradamante, A. Bressan, A. Brüll, S. Bültmann, E. BurtinC. Cavata, M. Clocchiatti, M. D. Corcoran, D. Crabb, J. Cranshaw, M. Crawford, T. Çuhadar, S. Dalla Torre, R. van Dantzig, S. Dhawan, C. Dulya, A. Dyring, S. Eichblatt, J. C. Faivre, D. Fasching, F. Feinstein, C. Fernandez, B. Frois, J. A. Garzon, T. Gaussiran, M. Giorgi, E. von Goeler, G. Gracia, N. de Groot, M. Grosse Perdekamp, E. Gülmez, D. von Harrach, T. Hasegawa, P. Hautle, N. Hayashi, C. A. Heusch, N. Horikawa, V. W. Hughes, G. Igo, S. Ishimoto, T. Iwata, E. M. Kabuß, R. Kaiser, A. Karev, H. J. Kessler, T. J. Ketel, A. Kishi, Yu Kisselev, L. Klostermann, D. Krämer, V. Krivokhijine, V. Kukhtin, J. Kyynäräinen, M. Lamanna, U. Landgraf, K. Lau, T. Layda, M. J. Le Goff, F. Lehar, A. de Lesquen, J. Lichtenstadt, T. Lindqvist, M. Litmaath, S. Lopez-Ponte, M. Lowe, A. Magnon, G. K. Mallot, F. Marie, A. Martin, J. Martino, T. Matsuda, B. Meyes, J. S. McCarthy, K. Medved, G. van Middelkoop, D. Miller, K. Mori, J. Moromisato, A. Nagaitsev, J. Nassalski, L. Naumann, T. O. Niinikoski, J. E J Oberski, D. P. Parks, A. Penzo, C. Perez, F. Perrot-Kunne, D. Peshekhonov, R. Piegaia, L. Pinsky, S. Platchkov, M. Plo, D. Pose, H. Postma, J. Pretz, T. Pussieux, J. Pyrlik, I. Reyhancan, J. M. Rieubland, A. Rijllart, J. B. Roberts, S. Rock, M. Rodriguez, E. Rondio, A. Rosado, I. Sabo, J. Saborido, A. Sandacz, I. Savin, P. Schiavon, K. P. Schüler, R. Segel, R. Seitz, Y. Semertzidis, F. Sever, P. Shanahan, N. Shumeiko, G. Smirnov, A. Staude, A. Steinmetz, U. Stiegler, H. Stuhrmann, K. M. Teichert, F. Tessarotto, M. Velasco, J. Vogt, R. Voss, R. Weinstein, C. Whitten, R. Windmolders, R. Willumeit, W. Wislicki, A. Witzmann, A. M. Zanetti, J. Zhao

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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Abstract

We have measured the spin-dependent structure function g₁ ^p of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003 < x < 0.7 and 1 GeV² < Q² < 60 GeV². Its first moment, ∫₀ ¹ g₁ ^p(x)dx, is found to be 0.136±0.011 (stat.)± 0.011 (syst.) at Q² = 10GeV². This value is smaller than the prediction of the Ellis-Jaffe sum rule by two standard deviations, and is consistent with previous measurements. A combined analysis of all available proton, deuteron and neutron data confirms the Bjorken sum rule to within 10% of the theoretical value.

Original language	English (US)
Pages (from-to)	399-406
Number of pages	8
Journal	Physics Letters B
Volume	329
Issue number	2-3
DOIs	https://doi.org/10.1016/0370-2693(94)90793-5
State	Published - Jun 16 1994

Funding

The spin dependent structure functions of the nucleon, gl and g2, can be measured in polarized deep inelastic lepton-nucleon scattering \[ 1 \]. Measurements of gl for the proton and the neutron allow us to test a fundamental QCD sum rule, derived by Bjorken \[2\], and to study the internal spin structure of the nucleon. Ellis and Jaffe \[3\] have derived sum rules for the pro- Monbusho International Science Research Program 15 Supported by the National Science Foundation (NWO) of the Netherlands 16 Supported by Comision Interministerial de Ciencia y Tecnologia 17 Supported by the US-Israel Binational Science Foundation, Jerusalem, Israel and The Israeli Academy of Sciences 18 Supported by KBN grant nr. 20958-9101 19 Permanent address: Belarussian State University, Minsk, Belarus. i Now at CERN, 1211 Geneva 23, Switzerland 2 Now at University of Montreal, PQ, H3C 3J7, Montreal, Canada 3 Now at Max Planck Institute, Heidelberg, Germany 4 Permanent address: Paul Scherrer Institut, 5232 Villigen, Switzerland 5 Permanent address: Miyazaki University, 88921 Miyazaki-Shi, Japan 6 Permanent address: KEK, 305 Ibaraki-Ken, Japan 7 Permanent address: University of Buenos Aires, Physics Department, 1428 Buenos Aires, Argentina 8 Now at SSC Laboratory, Dallas, 75237 TX, USA 9 Permanent address: The American University, Washington D.C. 20016, USA. lO Present address: ESFR, F-38043 Grenoble, France. ll Supported by Bundesministerium fiir Forschung und Technologie 12 Supported by the Department of Energy 13 Supported by the National Science Foundation 14 Supported by lshida Foundation, Mitsubishi Foundation and

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0370-2693(94)90793-5

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Adams, D., Adeva, B., Arik, E., Arvidson, A., Badelek, B., Ballintijn, M. K., Bardin, G., Baum, G., Berglund, P., Betev, L., Bird, I. G., Birsa, R., Björkholm, P., Bonner, B. E., de Botton, N., Bradamante, F., Bressan, A., Brüll, A., Bültmann, S., ... Zhao, J. (1994). Measurement of the spin-dependent structure function g₁(x) of the proton. Physics Letters B, 329(2-3), 399-406. https://doi.org/10.1016/0370-2693(94)90793-5

@article{30ad2bd0bffb491da6352b64b63f40bc,

title = "Measurement of the spin-dependent structure function g1(x) of the proton",

abstract = "We have measured the spin-dependent structure function g1 p of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003 < x < 0.7 and 1 GeV2 < Q2 < 60 GeV2. Its first moment, ∫0 1 g1 p(x)dx, is found to be 0.136±0.011 (stat.)± 0.011 (syst.) at Q2 = 10GeV2. This value is smaller than the prediction of the Ellis-Jaffe sum rule by two standard deviations, and is consistent with previous measurements. A combined analysis of all available proton, deuteron and neutron data confirms the Bjorken sum rule to within 10% of the theoretical value.",

author = "D. Adams and B. Adeva and E. Arik and A. Arvidson and B. Badelek and Ballintijn, {M. K.} and G. Bardin and G. Baum and P. Berglund and L. Betev and Bird, {I. G.} and R. Birsa and P. Bj{\"o}rkholm and Bonner, {B. E.} and {de Botton}, N. and F. Bradamante and A. Bressan and A. Br{\"u}ll and S. B{\"u}ltmann and E. Burtin and C. Cavata and M. Clocchiatti and Corcoran, {M. D.} and D. Crabb and J. Cranshaw and M. Crawford and T. {\c C}uhadar and {Dalla Torre}, S. and {van Dantzig}, R. and S. Dhawan and C. Dulya and A. Dyring and S. Eichblatt and Faivre, {J. C.} and D. Fasching and F. Feinstein and C. Fernandez and B. Frois and Garzon, {J. A.} and T. Gaussiran and M. Giorgi and {von Goeler}, E. and G. Gracia and {de Groot}, N. and {Grosse Perdekamp}, M. and E. G{\"u}lmez and {von Harrach}, D. and T. Hasegawa and P. Hautle and N. Hayashi and Heusch, {C. A.} and N. Horikawa and Hughes, {V. W.} and G. Igo and S. Ishimoto and T. Iwata and Kabu{\ss}, {E. M.} and R. Kaiser and A. Karev and Kessler, {H. J.} and Ketel, {T. J.} and A. Kishi and Yu Kisselev and L. Klostermann and D. Kr{\"a}mer and V. Krivokhijine and V. Kukhtin and J. Kyyn{\"a}r{\"a}inen and M. Lamanna and U. Landgraf and K. Lau and T. Layda and {Le Goff}, {M. J.} and F. Lehar and {de Lesquen}, A. and J. Lichtenstadt and T. Lindqvist and M. Litmaath and S. Lopez-Ponte and M. Lowe and A. Magnon and Mallot, {G. K.} and F. Marie and A. Martin and J. Martino and T. Matsuda and B. Meyes and McCarthy, {J. S.} and K. Medved and {van Middelkoop}, G. and D. Miller and K. Mori and J. Moromisato and A. Nagaitsev and J. Nassalski and L. Naumann and Niinikoski, {T. O.} and Oberski, {J. E J} and Parks, {D. P.} and A. Penzo and C. Perez and F. Perrot-Kunne and D. Peshekhonov and R. Piegaia and L. Pinsky and S. Platchkov and M. Plo and D. Pose and H. Postma and J. Pretz and T. Pussieux and J. Pyrlik and I. Reyhancan and Rieubland, {J. M.} and A. Rijllart and Roberts, {J. B.} and S. Rock and M. Rodriguez and E. Rondio and A. Rosado and I. Sabo and J. Saborido and A. Sandacz and I. Savin and P. Schiavon and Sch{\"u}ler, {K. P.} and R. Segel and R. Seitz and Y. Semertzidis and F. Sever and P. Shanahan and N. Shumeiko and G. Smirnov and A. Staude and A. Steinmetz and U. Stiegler and H. Stuhrmann and Teichert, {K. M.} and F. Tessarotto and M. Velasco and J. Vogt and R. Voss and R. Weinstein and C. Whitten and R. Windmolders and R. Willumeit and W. Wislicki and A. Witzmann and Zanetti, {A. M.} and J. Zhao",

note = "Funding Information: The spin dependent structure functions of the nucleon, gl and g2, can be measured in polarized deep inelastic lepton-nucleon scattering \[ 1 \]. Measurements of gl for the proton and the neutron allow us to test a fundamental QCD sum rule, derived by Bjorken \[2\], and to study the internal spin structure of the nucleon. Ellis and Jaffe \[3\] have derived sum rules for the pro- Monbusho International Science Research Program 15 Supported by the National Science Foundation (NWO) of the Netherlands 16 Supported by Comision Interministerial de Ciencia y Tecnologia 17 Supported by the US-Israel Binational Science Foundation, Jerusalem, Israel and The Israeli Academy of Sciences 18 Supported by KBN grant nr. 20958-9101 19 Permanent address: Belarussian State University, Minsk, Belarus. Funding Information: i Now at CERN, 1211 Geneva 23, Switzerland 2 Now at University of Montreal, PQ, H3C 3J7, Montreal, Canada 3 Now at Max Planck Institute, Heidelberg, Germany 4 Permanent address: Paul Scherrer Institut, 5232 Villigen, Switzerland 5 Permanent address: Miyazaki University, 88921 Miyazaki-Shi, Japan 6 Permanent address: KEK, 305 Ibaraki-Ken, Japan 7 Permanent address: University of Buenos Aires, Physics Department, 1428 Buenos Aires, Argentina 8 Now at SSC Laboratory, Dallas, 75237 TX, USA 9 Permanent address: The American University, Washington D.C. 20016, USA. lO Present address: ESFR, F-38043 Grenoble, France. ll Supported by Bundesministerium fiir Forschung und Technologie 12 Supported by the Department of Energy 13 Supported by the National Science Foundation 14 Supported by lshida Foundation, Mitsubishi Foundation and",

year = "1994",

month = jun,

day = "16",

doi = "10.1016/0370-2693(94)90793-5",

language = "English (US)",

volume = "329",

pages = "399--406",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "2-3",

}

Adams, D, Adeva, B, Arik, E, Arvidson, A, Badelek, B, Ballintijn, MK, Bardin, G, Baum, G, Berglund, P, Betev, L, Bird, IG, Birsa, R, Björkholm, P, Bonner, BE, de Botton, N, Bradamante, F, Bressan, A, Brüll, A, Bültmann, S, Burtin, E, Cavata, C, Clocchiatti, M, Corcoran, MD, Crabb, D, Cranshaw, J, Crawford, M, Çuhadar, T, Dalla Torre, S, van Dantzig, R, Dhawan, S, Dulya, C, Dyring, A, Eichblatt, S, Faivre, JC, Fasching, D, Feinstein, F, Fernandez, C, Frois, B, Garzon, JA, Gaussiran, T, Giorgi, M, von Goeler, E, Gracia, G, de Groot, N, Grosse Perdekamp, M, Gülmez, E, von Harrach, D, Hasegawa, T, Hautle, P, Hayashi, N, Heusch, CA, Horikawa, N, Hughes, VW, Igo, G, Ishimoto, S, Iwata, T, Kabuß, EM, Kaiser, R, Karev, A, Kessler, HJ, Ketel, TJ, Kishi, A, Kisselev, Y, Klostermann, L, Krämer, D, Krivokhijine, V, Kukhtin, V, Kyynäräinen, J, Lamanna, M, Landgraf, U, Lau, K, Layda, T, Le Goff, MJ, Lehar, F, de Lesquen, A, Lichtenstadt, J, Lindqvist, T, Litmaath, M, Lopez-Ponte, S, Lowe, M, Magnon, A, Mallot, GK, Marie, F, Martin, A, Martino, J, Matsuda, T, Meyes, B, McCarthy, JS, Medved, K, van Middelkoop, G, Miller, D, Mori, K, Moromisato, J, Nagaitsev, A, Nassalski, J, Naumann, L, Niinikoski, TO, Oberski, JEJ, Parks, DP, Penzo, A, Perez, C, Perrot-Kunne, F, Peshekhonov, D, Piegaia, R, Pinsky, L, Platchkov, S, Plo, M, Pose, D, Postma, H, Pretz, J, Pussieux, T, Pyrlik, J, Reyhancan, I, Rieubland, JM, Rijllart, A, Roberts, JB, Rock, S, Rodriguez, M, Rondio, E, Rosado, A, Sabo, I, Saborido, J, Sandacz, A, Savin, I, Schiavon, P, Schüler, KP, Segel, R, Seitz, R, Semertzidis, Y, Sever, F, Shanahan, P, Shumeiko, N, Smirnov, G, Staude, A, Steinmetz, A, Stiegler, U, Stuhrmann, H, Teichert, KM, Tessarotto, F, Velasco, M, Vogt, J, Voss, R, Weinstein, R, Whitten, C, Windmolders, R, Willumeit, R, Wislicki, W, Witzmann, A, Zanetti, AM & Zhao, J 1994, 'Measurement of the spin-dependent structure function g₁(x) of the proton', Physics Letters B, vol. 329, no. 2-3, pp. 399-406. https://doi.org/10.1016/0370-2693(94)90793-5

TY - JOUR

T1 - Measurement of the spin-dependent structure function g1(x) of the proton

AU - Adams, D.

AU - Adeva, B.

AU - Arik, E.

AU - Arvidson, A.

AU - Badelek, B.

AU - Ballintijn, M. K.

AU - Bardin, G.

AU - Baum, G.

AU - Berglund, P.

AU - Betev, L.

AU - Bird, I. G.

AU - Birsa, R.

AU - Björkholm, P.

AU - Bonner, B. E.

AU - de Botton, N.

AU - Bradamante, F.

AU - Bressan, A.

AU - Brüll, A.

AU - Bültmann, S.

AU - Burtin, E.

AU - Cavata, C.

AU - Clocchiatti, M.

AU - Corcoran, M. D.

AU - Crabb, D.

AU - Cranshaw, J.

AU - Crawford, M.

AU - Çuhadar, T.

AU - Dalla Torre, S.

AU - van Dantzig, R.

AU - Dhawan, S.

AU - Dulya, C.

AU - Dyring, A.

AU - Eichblatt, S.

AU - Faivre, J. C.

AU - Fasching, D.

AU - Feinstein, F.

AU - Fernandez, C.

AU - Frois, B.

AU - Garzon, J. A.

AU - Gaussiran, T.

AU - Giorgi, M.

AU - von Goeler, E.

AU - Gracia, G.

AU - de Groot, N.

AU - Grosse Perdekamp, M.

AU - Gülmez, E.

AU - von Harrach, D.

AU - Hasegawa, T.

AU - Hautle, P.

AU - Hayashi, N.

AU - Heusch, C. A.

AU - Horikawa, N.

AU - Hughes, V. W.

AU - Igo, G.

AU - Ishimoto, S.

AU - Iwata, T.

AU - Kabuß, E. M.

AU - Kaiser, R.

AU - Karev, A.

AU - Kessler, H. J.

AU - Ketel, T. J.

AU - Kishi, A.

AU - Kisselev, Yu

AU - Klostermann, L.

AU - Krämer, D.

AU - Krivokhijine, V.

AU - Kukhtin, V.

AU - Kyynäräinen, J.

AU - Lamanna, M.

AU - Landgraf, U.

AU - Lau, K.

AU - Layda, T.

AU - Le Goff, M. J.

AU - Lehar, F.

AU - de Lesquen, A.

AU - Lichtenstadt, J.

AU - Lindqvist, T.

AU - Litmaath, M.

AU - Lopez-Ponte, S.

AU - Lowe, M.

AU - Magnon, A.

AU - Mallot, G. K.

AU - Marie, F.

AU - Martin, A.

AU - Martino, J.

AU - Matsuda, T.

AU - Meyes, B.

AU - McCarthy, J. S.

AU - Medved, K.

AU - van Middelkoop, G.

AU - Miller, D.

AU - Mori, K.

AU - Moromisato, J.

AU - Nagaitsev, A.

AU - Nassalski, J.

AU - Naumann, L.

AU - Niinikoski, T. O.

AU - Oberski, J. E J

AU - Parks, D. P.

AU - Penzo, A.

AU - Perez, C.

AU - Perrot-Kunne, F.

AU - Peshekhonov, D.

AU - Piegaia, R.

AU - Pinsky, L.

AU - Platchkov, S.

AU - Plo, M.

AU - Pose, D.

AU - Postma, H.

AU - Pretz, J.

AU - Pussieux, T.

AU - Pyrlik, J.

AU - Reyhancan, I.

AU - Rieubland, J. M.

AU - Rijllart, A.

AU - Roberts, J. B.

AU - Rock, S.

AU - Rodriguez, M.

AU - Rondio, E.

AU - Rosado, A.

AU - Sabo, I.

AU - Saborido, J.

AU - Sandacz, A.

AU - Savin, I.

AU - Schiavon, P.

AU - Schüler, K. P.

AU - Segel, R.

AU - Seitz, R.

AU - Semertzidis, Y.

AU - Sever, F.

AU - Shanahan, P.

AU - Shumeiko, N.

AU - Smirnov, G.

AU - Staude, A.

AU - Steinmetz, A.

AU - Stiegler, U.

AU - Stuhrmann, H.

AU - Teichert, K. M.

AU - Tessarotto, F.

AU - Velasco, M.

AU - Vogt, J.

AU - Voss, R.

AU - Weinstein, R.

AU - Whitten, C.

AU - Windmolders, R.

AU - Willumeit, R.

AU - Wislicki, W.

AU - Witzmann, A.

AU - Zanetti, A. M.

AU - Zhao, J.

N1 - Funding Information: The spin dependent structure functions of the nucleon, gl and g2, can be measured in polarized deep inelastic lepton-nucleon scattering \[ 1 \]. Measurements of gl for the proton and the neutron allow us to test a fundamental QCD sum rule, derived by Bjorken \[2\], and to study the internal spin structure of the nucleon. Ellis and Jaffe \[3\] have derived sum rules for the pro- Monbusho International Science Research Program 15 Supported by the National Science Foundation (NWO) of the Netherlands 16 Supported by Comision Interministerial de Ciencia y Tecnologia 17 Supported by the US-Israel Binational Science Foundation, Jerusalem, Israel and The Israeli Academy of Sciences 18 Supported by KBN grant nr. 20958-9101 19 Permanent address: Belarussian State University, Minsk, Belarus. Funding Information: i Now at CERN, 1211 Geneva 23, Switzerland 2 Now at University of Montreal, PQ, H3C 3J7, Montreal, Canada 3 Now at Max Planck Institute, Heidelberg, Germany 4 Permanent address: Paul Scherrer Institut, 5232 Villigen, Switzerland 5 Permanent address: Miyazaki University, 88921 Miyazaki-Shi, Japan 6 Permanent address: KEK, 305 Ibaraki-Ken, Japan 7 Permanent address: University of Buenos Aires, Physics Department, 1428 Buenos Aires, Argentina 8 Now at SSC Laboratory, Dallas, 75237 TX, USA 9 Permanent address: The American University, Washington D.C. 20016, USA. lO Present address: ESFR, F-38043 Grenoble, France. ll Supported by Bundesministerium fiir Forschung und Technologie 12 Supported by the Department of Energy 13 Supported by the National Science Foundation 14 Supported by lshida Foundation, Mitsubishi Foundation and

PY - 1994/6/16

Y1 - 1994/6/16

N2 - We have measured the spin-dependent structure function g1 p of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003 < x < 0.7 and 1 GeV2 < Q2 < 60 GeV2. Its first moment, ∫0 1 g1 p(x)dx, is found to be 0.136±0.011 (stat.)± 0.011 (syst.) at Q2 = 10GeV2. This value is smaller than the prediction of the Ellis-Jaffe sum rule by two standard deviations, and is consistent with previous measurements. A combined analysis of all available proton, deuteron and neutron data confirms the Bjorken sum rule to within 10% of the theoretical value.

AB - We have measured the spin-dependent structure function g1 p of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003 < x < 0.7 and 1 GeV2 < Q2 < 60 GeV2. Its first moment, ∫0 1 g1 p(x)dx, is found to be 0.136±0.011 (stat.)± 0.011 (syst.) at Q2 = 10GeV2. This value is smaller than the prediction of the Ellis-Jaffe sum rule by two standard deviations, and is consistent with previous measurements. A combined analysis of all available proton, deuteron and neutron data confirms the Bjorken sum rule to within 10% of the theoretical value.

UR - http://www.scopus.com/inward/record.url?scp=0009423346&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0009423346&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(94)90793-5

DO - 10.1016/0370-2693(94)90793-5

M3 - Article

AN - SCOPUS:0009423346

SN - 0370-2693

VL - 329

SP - 399

EP - 406

JO - Physics Letters B

JF - Physics Letters B

IS - 2-3

ER -

Measurement of the spin-dependent structure function g₁(x) of the proton

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