Measurement of longitudinal spin transfer to [Formula Presented] hyperons in deep-inelastic lepton scattering

A. Airapetian; N. Akopov; M. Amarian; E. C. Aschenauer; H. Avakian; R. Avakian; A. Avetissian; B. Bains; C. Baumgarten; M. Beckmann; S. Belostotski; J. E. Belz; Th Benisch; S. Bernreuther; N. Bianchi; J. Blouw; H. Böttcher; A. Borissov; M. Bouwhuis; J. Brack; S. Brauksiepe; B. Braun; B. Bray; S. Brons; W. Brückner; A. Brüll; E. E.W. Bruins; H. J. Bulten; G. P. Capitani; P. Carter; P. Chumney; E. Cisbani; G. R. Court; P. F. Dalpiaz; E. De Sanctis; D. De Schepper; E. Devitsin; P. K.A. de Witt Huberts; P. Di Nezza; M. Düren; A. Dvoredsky; G. Elbakian; J. Ely; A. Fantoni; A. Fechtchenko; M. Ferstl; K. Fiedler; B. W. Filippone; H. Fischer; B. Fox; J. Franz; S. Frullani; M. A. Funk; Y. Gärber; H. Gao; F. Garibaldi; G. Gavrilov; P. Geiger; V. Gharibyan; A. Golendukhin; G. Graw; O. Grebeniouk; P. W. Green; L. G. Greeniaus; C. Grosshauser; M. Guidal; A. Gute; V. Gyurjyan; J. P. Haas; W. Haeberli; O. Häusser; J. O. Hansen; M. Hartig; D. Hasch; F. H. Heinsius; R. Henderson; M. Henoch; R. Hertenberger; Y. Holler; R. J. Holt; W. Hoprich; H. Ihssen; M. Iodice; A. Izotov; H. E. Jackson; A. Jgoun; R. Kaiser; E. Kinney; M. Kirsch; A. Kisselev; P. Kitching; H. Kobayashi; N. Koch; K. Königsmann; M. Kolstein; H. Kolster; V. Korotkov; W. Korsch; V. Kozlov; L. H. Kramer; V. G. Krivokhijine; M. Kurisuno; G. Kyle; W. Lachnit; P. Lenisa; W. Lorenzon; N. C.R. Makins; S. I. Manaenkov; F. K. Martens; J. W. Martin; F. Masoli; A. Mateos; M. McAndrew; K. McIlhany; R. D. McKeown; F. Meissner; F. Menden; A. Metz; N. Meyners; O. Mikloukho; C. A. Miller; M. A. Miller; R. Milner; A. Most; V. Muccifora; R. Mussa; A. Nagaitsev; Y. Naryshkin; A. M. Nathan; F. Neunreither; J. M. Niczyporuk; W. D. Nowak; M. Nupieri; T. G. O’Neill; R. Openshaw; J. Ouyang; B. R. Owen; V. Papavassiliou; S. F. Pate; M. Pitt; S. Potashov; D. H. Potterveld; G. Rakness; A. Reali; R. Redwine; A. R. Reolon; R. Ristinen; K. Rith; P. Rossi; S. Rudnitsky; M. Ruh; D. Ryckbosch; Y. Sakemi; I. Savin; C. Scarlett; F. Schmidt; H. Schmitt; G. Schnell; K. P. Schüler; A. Schwind; J. Seibert; T. A. Shibata; K. Shibatani; T. Shin; V. Shutov; C. Simani; A. Simon; K. Sinram; P. Slavich; M. Spengos; E. Steffens; J. Stenger; J. Stewart; U. Stösslein; M. Sutter; H. Tallini; S. Taroian; A. Terkulov; E. Thomas; B. Tipton; M. Tytgat; G. M. Urciuoli; J. F.J. van den Brand; G. van der Steenhoven; R. van de Vyver; J. J. van Hunen; M. C. Vetterli; V. Vikhrov; M. G. Vincter; J. Visser; E. Volk; W. Wander; J. Wendland; S. E. Williamson; T. Wise; K. Woller; S. Yoneyama; H. Zohrabian

doi:10.1103/PhysRevD.64.112005

Measurement of longitudinal spin transfer to [Formula Presented] hyperons in deep-inelastic lepton scattering

A. Airapetian, N. Akopov, M. Amarian, E. C. Aschenauer, H. Avakian, R. Avakian, A. Avetissian, B. Bains, C. Baumgarten, M. Beckmann, S. Belostotski, J. E. Belz, Th Benisch, S. Bernreuther, N. Bianchi, J. Blouw, H. Böttcher, A. Borissov, M. Bouwhuis, J. BrackS. Brauksiepe, B. Braun, B. Bray, S. Brons, W. Brückner, A. Brüll, E. E.W. Bruins, H. J. Bulten, G. P. Capitani, P. Carter, P. Chumney, E. Cisbani, G. R. Court, P. F. Dalpiaz, E. De Sanctis, D. De Schepper, E. Devitsin, P. K.A. de Witt Huberts, P. Di Nezza, M. Düren, A. Dvoredsky, G. Elbakian, J. Ely, A. Fantoni, A. Fechtchenko, M. Ferstl, K. Fiedler, B. W. Filippone, H. Fischer, B. Fox, J. Franz, S. Frullani, M. A. Funk, Y. Gärber, H. Gao, F. Garibaldi, G. Gavrilov, P. Geiger, V. Gharibyan, A. Golendukhin, G. Graw, O. Grebeniouk, P. W. Green, L. G. Greeniaus, C. Grosshauser, M. Guidal, A. Gute, V. Gyurjyan, J. P. Haas, W. Haeberli, O. Häusser, J. O. Hansen, M. Hartig, D. Hasch, F. H. Heinsius, R. Henderson, M. Henoch, R. Hertenberger, Y. Holler, R. J. Holt, W. Hoprich, H. Ihssen, M. Iodice, A. Izotov, H. E. Jackson, A. Jgoun, R. Kaiser, E. Kinney, M. Kirsch, A. Kisselev, P. Kitching, H. Kobayashi, N. Koch, K. Königsmann, M. Kolstein, H. Kolster, V. Korotkov, W. Korsch, V. Kozlov, L. H. Kramer, V. G. Krivokhijine, M. Kurisuno, G. Kyle, W. Lachnit, P. Lenisa, W. Lorenzon, N. C.R. Makins, S. I. Manaenkov, F. K. Martens, J. W. Martin, F. Masoli, A. Mateos, M. McAndrew, K. McIlhany, R. D. McKeown, F. Meissner, F. Menden, A. Metz, N. Meyners, O. Mikloukho, C. A. Miller, M. A. Miller, R. Milner, A. Most, V. Muccifora, R. Mussa, A. Nagaitsev, Y. Naryshkin, A. M. Nathan, F. Neunreither, J. M. Niczyporuk, W. D. Nowak, M. Nupieri, T. G. O’Neill, R. Openshaw, J. Ouyang, B. R. Owen, V. Papavassiliou, S. F. Pate, M. Pitt, S. Potashov, D. H. Potterveld, G. Rakness, A. Reali, R. Redwine, A. R. Reolon, R. Ristinen, K. Rith, P. Rossi, S. Rudnitsky, M. Ruh, D. Ryckbosch, Y. Sakemi, I. Savin, C. Scarlett, F. Schmidt, H. Schmitt, G. Schnell, K. P. Schüler, A. Schwind, J. Seibert, T. A. Shibata, K. Shibatani, T. Shin, V. Shutov, C. Simani, A. Simon, K. Sinram, P. Slavich, M. Spengos, E. Steffens, J. Stenger, J. Stewart, U. Stösslein, M. Sutter, H. Tallini, S. Taroian, A. Terkulov, E. Thomas, B. Tipton, M. Tytgat, G. M. Urciuoli, J. F.J. van den Brand, G. van der Steenhoven, R. van de Vyver, J. J. van Hunen, M. C. Vetterli, V. Vikhrov, M. G. Vincter, J. Visser, E. Volk, W. Wander, J. Wendland, S. E. Williamson, T. Wise, K. Woller, S. Yoneyama, H. Zohrabian

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

Abstract

Spin transfer in deep-inelastic (Formula presented) electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the DESY HERA storage ring. For an average fractional energy transfer (Formula presented) the longitudinal spin transfer from the virtual photon to the (Formula presented) has been extracted. The spin transfer along the (Formula presented) momentum direction is found to be (Formula presented) similar values are found for other possible choices for the longitudinal spin direction of the (Formula presented) This result is the most precise value obtained to date from deep-inelastic scattering with charged lepton beams, and is sensitive to polarized up quark fragmentation to hyperon states. The experimental result is found to be in general agreement with various models of the (Formula presented) spin content, and is consistent with the assumption of helicity conservation in the fragmentation process.

Original language	English (US)
Pages (from-to)	7
Number of pages	1
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	64
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.64.112005
State	Published - 2001
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

Online availability

10.1103/PhysRevD.64.112005

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Airapetian, A., Akopov, N., Amarian, M., Aschenauer, E. C., Avakian, H., Avakian, R., Avetissian, A., Bains, B., Baumgarten, C., Beckmann, M., Belostotski, S., Belz, J. E., Benisch, T., Bernreuther, S., Bianchi, N., Blouw, J., Böttcher, H., Borissov, A., Bouwhuis, M., ... Zohrabian, H. (2001). Measurement of longitudinal spin transfer to [Formula Presented] hyperons in deep-inelastic lepton scattering. Physical Review D - Particles, Fields, Gravitation and Cosmology, 64(11), 7. https://doi.org/10.1103/PhysRevD.64.112005

Airapetian, A, Akopov, N, Amarian, M, Aschenauer, EC, Avakian, H, Avakian, R, Avetissian, A, Bains, B, Baumgarten, C, Beckmann, M, Belostotski, S, Belz, JE, Benisch, T, Bernreuther, S, Bianchi, N, Blouw, J, Böttcher, H, Borissov, A, Bouwhuis, M, Brack, J, Brauksiepe, S, Braun, B, Bray, B, Brons, S, Brückner, W, Brüll, A, Bruins, EEW, Bulten, HJ, Capitani, GP, Carter, P, Chumney, P, Cisbani, E, Court, GR, Dalpiaz, PF, De Sanctis, E, De Schepper, D, Devitsin, E, de Witt Huberts, PKA, Di Nezza, P, Düren, M, Dvoredsky, A, Elbakian, G, Ely, J, Fantoni, A, Fechtchenko, A, Ferstl, M, Fiedler, K, Filippone, BW, Fischer, H, Fox, B, Franz, J, Frullani, S, Funk, MA, Gärber, Y, Gao, H, Garibaldi, F, Gavrilov, G, Geiger, P, Gharibyan, V, Golendukhin, A, Graw, G, Grebeniouk, O, Green, PW, Greeniaus, LG, Grosshauser, C, Guidal, M, Gute, A, Gyurjyan, V, Haas, JP, Haeberli, W, Häusser, O, Hansen, JO, Hartig, M, Hasch, D, Heinsius, FH, Henderson, R, Henoch, M, Hertenberger, R, Holler, Y, Holt, RJ, Hoprich, W, Ihssen, H, Iodice, M, Izotov, A, Jackson, HE, Jgoun, A, Kaiser, R, Kinney, E, Kirsch, M, Kisselev, A, Kitching, P, Kobayashi, H, Koch, N, Königsmann, K, Kolstein, M, Kolster, H, Korotkov, V, Korsch, W, Kozlov, V, Kramer, LH, Krivokhijine, VG, Kurisuno, M, Kyle, G, Lachnit, W, Lenisa, P, Lorenzon, W, Makins, NCR, Manaenkov, SI, Martens, FK, Martin, JW, Masoli, F, Mateos, A, McAndrew, M, McIlhany, K, McKeown, RD, Meissner, F, Menden, F, Metz, A, Meyners, N, Mikloukho, O, Miller, CA, Miller, MA, Milner, R, Most, A, Muccifora, V, Mussa, R, Nagaitsev, A, Naryshkin, Y, Nathan, AM, Neunreither, F, Niczyporuk, JM, Nowak, WD, Nupieri, M, O’Neill, TG, Openshaw, R, Ouyang, J, Owen, BR, Papavassiliou, V, Pate, SF, Pitt, M, Potashov, S, Potterveld, DH, Rakness, G, Reali, A, Redwine, R, Reolon, AR, Ristinen, R, Rith, K, Rossi, P, Rudnitsky, S, Ruh, M, Ryckbosch, D, Sakemi, Y, Savin, I, Scarlett, C, Schmidt, F, Schmitt, H, Schnell, G, Schüler, KP, Schwind, A, Seibert, J, Shibata, TA, Shibatani, K, Shin, T, Shutov, V, Simani, C, Simon, A, Sinram, K, Slavich, P, Spengos, M, Steffens, E, Stenger, J, Stewart, J, Stösslein, U, Sutter, M, Tallini, H, Taroian, S, Terkulov, A, Thomas, E, Tipton, B, Tytgat, M, Urciuoli, GM, van den Brand, JFJ, van der Steenhoven, G, van de Vyver, R, van Hunen, JJ, Vetterli, MC, Vikhrov, V, Vincter, MG, Visser, J, Volk, E, Wander, W, Wendland, J, Williamson, SE, Wise, T, Woller, K, Yoneyama, S & Zohrabian, H 2001, 'Measurement of longitudinal spin transfer to [Formula Presented] hyperons in deep-inelastic lepton scattering', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 64, no. 11, pp. 7. https://doi.org/10.1103/PhysRevD.64.112005

@article{7a9014e587104152841311612af12a51,

title = "Measurement of longitudinal spin transfer to [Formula Presented] hyperons in deep-inelastic lepton scattering",

abstract = "Spin transfer in deep-inelastic (Formula presented) electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the DESY HERA storage ring. For an average fractional energy transfer (Formula presented) the longitudinal spin transfer from the virtual photon to the (Formula presented) has been extracted. The spin transfer along the (Formula presented) momentum direction is found to be (Formula presented) similar values are found for other possible choices for the longitudinal spin direction of the (Formula presented) This result is the most precise value obtained to date from deep-inelastic scattering with charged lepton beams, and is sensitive to polarized up quark fragmentation to hyperon states. The experimental result is found to be in general agreement with various models of the (Formula presented) spin content, and is consistent with the assumption of helicity conservation in the fragmentation process.",

author = "A. Airapetian and N. Akopov and M. Amarian and Aschenauer, {E. C.} and H. Avakian and R. Avakian and A. Avetissian and B. Bains and C. Baumgarten and M. Beckmann and S. Belostotski and Belz, {J. E.} and Th Benisch and S. Bernreuther and N. Bianchi and J. Blouw and H. B{\"o}ttcher and A. Borissov and M. Bouwhuis and J. Brack and S. Brauksiepe and B. Braun and B. Bray and S. Brons and W. Br{\"u}ckner and A. Br{\"u}ll and Bruins, {E. E.W.} and Bulten, {H. J.} and Capitani, {G. P.} and P. Carter and P. Chumney and E. Cisbani and Court, {G. R.} and Dalpiaz, {P. F.} and {De Sanctis}, E. and {De Schepper}, D. and E. Devitsin and {de Witt Huberts}, {P. K.A.} and {Di Nezza}, P. and M. D{\"u}ren and A. Dvoredsky and G. Elbakian and J. Ely and A. Fantoni and A. Fechtchenko and M. Ferstl and K. Fiedler and Filippone, {B. W.} and H. Fischer and B. Fox and J. Franz and S. Frullani and Funk, {M. A.} and Y. G{\"a}rber and H. Gao and F. Garibaldi and G. Gavrilov and P. Geiger and V. Gharibyan and A. Golendukhin and G. Graw and O. Grebeniouk and Green, {P. W.} and Greeniaus, {L. G.} and C. Grosshauser and M. Guidal and A. Gute and V. Gyurjyan and Haas, {J. P.} and W. Haeberli and O. H{\"a}usser and Hansen, {J. O.} and M. Hartig and D. Hasch and Heinsius, {F. H.} and R. Henderson and M. Henoch and R. Hertenberger and Y. Holler and Holt, {R. J.} and W. Hoprich and H. Ihssen and M. Iodice and A. Izotov and Jackson, {H. E.} and A. Jgoun and R. Kaiser and E. Kinney and M. Kirsch and A. Kisselev and P. Kitching and H. Kobayashi and N. Koch and K. K{\"o}nigsmann and M. Kolstein and H. Kolster and V. Korotkov and W. Korsch and V. Kozlov and Kramer, {L. H.} and Krivokhijine, {V. G.} and M. Kurisuno and G. Kyle and W. Lachnit and P. Lenisa and W. Lorenzon and Makins, {N. C.R.} and Manaenkov, {S. I.} and Martens, {F. K.} and Martin, {J. W.} and F. Masoli and A. Mateos and M. McAndrew and K. McIlhany and McKeown, {R. D.} and F. Meissner and F. Menden and A. Metz and N. Meyners and O. Mikloukho and Miller, {C. A.} and Miller, {M. A.} and R. Milner and A. Most and V. Muccifora and R. Mussa and A. Nagaitsev and Y. Naryshkin and Nathan, {A. M.} and F. Neunreither and Niczyporuk, {J. M.} and Nowak, {W. D.} and M. Nupieri and O{\textquoteright}Neill, {T. G.} and R. Openshaw and J. Ouyang and Owen, {B. R.} and V. Papavassiliou and Pate, {S. F.} and M. Pitt and S. Potashov and Potterveld, {D. H.} and G. Rakness and A. Reali and R. Redwine and Reolon, {A. R.} and R. Ristinen and K. Rith and P. Rossi and S. Rudnitsky and M. Ruh and D. Ryckbosch and Y. Sakemi and I. Savin and C. Scarlett and F. Schmidt and H. Schmitt and G. Schnell and Sch{\"u}ler, {K. P.} and A. Schwind and J. Seibert and Shibata, {T. A.} and K. Shibatani and T. Shin and V. Shutov and C. Simani and A. Simon and K. Sinram and P. Slavich and M. Spengos and E. Steffens and J. Stenger and J. Stewart and U. St{\"o}sslein and M. Sutter and H. Tallini and S. Taroian and A. Terkulov and E. Thomas and B. Tipton and M. Tytgat and Urciuoli, {G. M.} and {van den Brand}, {J. F.J.} and {van der Steenhoven}, G. and {van de Vyver}, R. and {van Hunen}, {J. J.} and Vetterli, {M. C.} and V. Vikhrov and Vincter, {M. G.} and J. Visser and E. Volk and W. Wander and J. Wendland and Williamson, {S. E.} and T. Wise and K. Woller and S. Yoneyama and H. Zohrabian",

year = "2001",

doi = "10.1103/PhysRevD.64.112005",

language = "English (US)",

volume = "64",

pages = "7",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "11",

}

TY - JOUR

T1 - Measurement of longitudinal spin transfer to [Formula Presented] hyperons in deep-inelastic lepton scattering

AU - Airapetian, A.

AU - Akopov, N.

AU - Amarian, M.

AU - Aschenauer, E. C.

AU - Avakian, H.

AU - Avakian, R.

AU - Avetissian, A.

AU - Bains, B.

AU - Baumgarten, C.

AU - Beckmann, M.

AU - Belostotski, S.

AU - Belz, J. E.

AU - Benisch, Th

AU - Bernreuther, S.

AU - Bianchi, N.

AU - Blouw, J.

AU - Böttcher, H.

AU - Borissov, A.

AU - Bouwhuis, M.

AU - Brack, J.

AU - Brauksiepe, S.

AU - Braun, B.

AU - Bray, B.

AU - Brons, S.

AU - Brückner, W.

AU - Brüll, A.

AU - Bruins, E. E.W.

AU - Bulten, H. J.

AU - Capitani, G. P.

AU - Carter, P.

AU - Chumney, P.

AU - Cisbani, E.

AU - Court, G. R.

AU - Dalpiaz, P. F.

AU - De Sanctis, E.

AU - De Schepper, D.

AU - Devitsin, E.

AU - de Witt Huberts, P. K.A.

AU - Di Nezza, P.

AU - Düren, M.

AU - Dvoredsky, A.

AU - Elbakian, G.

AU - Ely, J.

AU - Fantoni, A.

AU - Fechtchenko, A.

AU - Ferstl, M.

AU - Fiedler, K.

AU - Filippone, B. W.

AU - Fischer, H.

AU - Fox, B.

AU - Franz, J.

AU - Frullani, S.

AU - Funk, M. A.

AU - Gärber, Y.

AU - Gao, H.

AU - Garibaldi, F.

AU - Gavrilov, G.

AU - Geiger, P.

AU - Gharibyan, V.

AU - Golendukhin, A.

AU - Graw, G.

AU - Grebeniouk, O.

AU - Green, P. W.

AU - Greeniaus, L. G.

AU - Grosshauser, C.

AU - Guidal, M.

AU - Gute, A.

AU - Gyurjyan, V.

AU - Haas, J. P.

AU - Haeberli, W.

AU - Häusser, O.

AU - Hansen, J. O.

AU - Hartig, M.

AU - Hasch, D.

AU - Heinsius, F. H.

AU - Henderson, R.

AU - Henoch, M.

AU - Hertenberger, R.

AU - Holler, Y.

AU - Holt, R. J.

AU - Hoprich, W.

AU - Ihssen, H.

AU - Iodice, M.

AU - Izotov, A.

AU - Jackson, H. E.

AU - Jgoun, A.

AU - Kaiser, R.

AU - Kinney, E.

AU - Kirsch, M.

AU - Kisselev, A.

AU - Kitching, P.

AU - Kobayashi, H.

AU - Koch, N.

AU - Königsmann, K.

AU - Kolstein, M.

AU - Kolster, H.

AU - Korotkov, V.

AU - Korsch, W.

AU - Kozlov, V.

AU - Kramer, L. H.

AU - Krivokhijine, V. G.

AU - Kurisuno, M.

AU - Kyle, G.

AU - Lachnit, W.

AU - Lenisa, P.

AU - Lorenzon, W.

AU - Makins, N. C.R.

AU - Manaenkov, S. I.

AU - Martens, F. K.

AU - Martin, J. W.

AU - Masoli, F.

AU - Mateos, A.

AU - McAndrew, M.

AU - McIlhany, K.

AU - McKeown, R. D.

AU - Meissner, F.

AU - Menden, F.

AU - Metz, A.

AU - Meyners, N.

AU - Mikloukho, O.

AU - Miller, C. A.

AU - Miller, M. A.

AU - Milner, R.

AU - Most, A.

AU - Muccifora, V.

AU - Mussa, R.

AU - Nagaitsev, A.

AU - Naryshkin, Y.

AU - Nathan, A. M.

AU - Neunreither, F.

AU - Niczyporuk, J. M.

AU - Nowak, W. D.

AU - Nupieri, M.

AU - O’Neill, T. G.

AU - Openshaw, R.

AU - Ouyang, J.

AU - Owen, B. R.

AU - Papavassiliou, V.

AU - Pate, S. F.

AU - Pitt, M.

AU - Potashov, S.

AU - Potterveld, D. H.

AU - Rakness, G.

AU - Reali, A.

AU - Redwine, R.

AU - Reolon, A. R.

AU - Ristinen, R.

AU - Rith, K.

AU - Rossi, P.

AU - Rudnitsky, S.

AU - Ruh, M.

AU - Ryckbosch, D.

AU - Sakemi, Y.

AU - Savin, I.

AU - Scarlett, C.

AU - Schmidt, F.

AU - Schmitt, H.

AU - Schnell, G.

AU - Schüler, K. P.

AU - Schwind, A.

AU - Seibert, J.

AU - Shibata, T. A.

AU - Shibatani, K.

AU - Shin, T.

AU - Shutov, V.

AU - Simani, C.

AU - Simon, A.

AU - Sinram, K.

AU - Slavich, P.

AU - Spengos, M.

AU - Steffens, E.

AU - Stenger, J.

AU - Stewart, J.

AU - Stösslein, U.

AU - Sutter, M.

AU - Tallini, H.

AU - Taroian, S.

AU - Terkulov, A.

AU - Thomas, E.

AU - Tipton, B.

AU - Tytgat, M.

AU - Urciuoli, G. M.

AU - van den Brand, J. F.J.

AU - van der Steenhoven, G.

AU - van de Vyver, R.

AU - van Hunen, J. J.

AU - Vetterli, M. C.

AU - Vikhrov, V.

AU - Vincter, M. G.

AU - Visser, J.

AU - Volk, E.

AU - Wander, W.

AU - Wendland, J.

AU - Williamson, S. E.

AU - Wise, T.

AU - Woller, K.

AU - Yoneyama, S.

AU - Zohrabian, H.

PY - 2001

Y1 - 2001

N2 - Spin transfer in deep-inelastic (Formula presented) electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the DESY HERA storage ring. For an average fractional energy transfer (Formula presented) the longitudinal spin transfer from the virtual photon to the (Formula presented) has been extracted. The spin transfer along the (Formula presented) momentum direction is found to be (Formula presented) similar values are found for other possible choices for the longitudinal spin direction of the (Formula presented) This result is the most precise value obtained to date from deep-inelastic scattering with charged lepton beams, and is sensitive to polarized up quark fragmentation to hyperon states. The experimental result is found to be in general agreement with various models of the (Formula presented) spin content, and is consistent with the assumption of helicity conservation in the fragmentation process.

AB - Spin transfer in deep-inelastic (Formula presented) electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the DESY HERA storage ring. For an average fractional energy transfer (Formula presented) the longitudinal spin transfer from the virtual photon to the (Formula presented) has been extracted. The spin transfer along the (Formula presented) momentum direction is found to be (Formula presented) similar values are found for other possible choices for the longitudinal spin direction of the (Formula presented) This result is the most precise value obtained to date from deep-inelastic scattering with charged lepton beams, and is sensitive to polarized up quark fragmentation to hyperon states. The experimental result is found to be in general agreement with various models of the (Formula presented) spin content, and is consistent with the assumption of helicity conservation in the fragmentation process.

UR - http://www.scopus.com/inward/record.url?scp=85038341208&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevD.64.112005

DO - 10.1103/PhysRevD.64.112005

M3 - Article

AN - SCOPUS:85038341208

SN - 1550-7998

VL - 64

SP - 7

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 11

ER -

Measurement of longitudinal spin transfer to [Formula Presented] hyperons in deep-inelastic lepton scattering

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