Hadron formation in deep-inelastic positron scattering in a nuclear environment

A. Airapetian; N. Akopov; Z. Akopov; I. Akushevich; M. Amarian; J. Arrington; E. C. Aschenauer; H. Avakian; R. Avakian; A. Avetissian; E. Avetissian; P. Bailey; B. Bains; C. Baumgarten; M. Beckmann; S. Belostotski; S. Bernreuther; N. Bianchi; H. Böttcher; A. Borissov; M. Bouwhuis; J. Brack; S. Brauksiepe; B. Braun; W. Brückner; A. Brüll; P. Budz; H. J. Bulten; G. P. Capitani; P. Carter; P. Chumney; E. Cisbani; G. R. Court; P. F. Dalpiaz; R. De Leo; L. De Nardo; E. De Sanctis; D. De Schepper; E. Devitsin; P. K.A. de Witt Huberts; P. Di Nezza; V. Djordjadze; M. Düren; A. Dvoredsky; G. Elbakian; J. Ely; A. Fantoni; A. Fechtchenko; L. Felawka; M. Ferro-Luzzi; K. Fiedler; B. W. Filippone; H. Fischer; B. Fox; J. Franz; S. Frullani; Y. Gärber; F. Garibaldi; E. Garutti; G. Gavrilov; V. Gharibyan; A. Golendukhin; G. Graw; O. Grebeniouk; P. W. Green; L. G. Greeniaus; A. Gute; W. Haeberli; M. Hartig; D. Hasch; D. Heesbeen; F. H. Heinsius; M. Henoch; R. Hertenberger; W. H.A. Hesselink; G. Hofman; Y. Holler; R. J. Holt; B. Hommez; G. Iarygin; M. Iodice; A. Izotov; H. E. Jackson; A. Jgoun; P. Jung; R. Kaiser; J. Kanesaka; E. Kinney; A. Kisselev; P. Kitching; H. Kobayashi; N. Koch; K. Königsmann; H. Kolster; V. Korotkov; E. Kotik; V. Kozlov; V. G. Krivokhijine; G. Kyle; L. Lagamba; A. Laziev; P. Lenisa; T. Lindemann; W. Lorenzon; N. C.R. Makins; J. W. Martin; H. Marukyan; F. Masoli; M. McAndrew; K. Mcllhany; R. D. McKeown; F. Meissner; F. Menden; A. Metz; N. Meyners; O. Mikloukho; C. A. Miller; R. Milner; V. Muccifora; R. Mussa; A. Nagaitsev; E. Nappi; Y. Naryshkin; A. Nass; K. Negodaeva; W. D. Nowak; K. Oganessyan; T. G. O'Neill; R. Openshaw; J. Ouyang; B. R. Owen; S. F. Pate; S. Potashov; D. H. Potterveld; G. Rakness; V. Rappoport; R. Redwine; D. Reggiani; A. R. Reolon; R. Ristinen; K. Rith; D. Robinson; A. Rostomyan; M. Ruh; D. Ryckbosch; Y. Sakemi; T. Sato; I. Savin; C. Scarlett; A. Schäfer; C. Schill; F. Schmidt; G. Schnell; K. P. Schüler; A. Schwind; J. Seibert; B. Seitz; T. A. Shibata; T. Shin; V. Shutov; M. C. Simani; A. Simon; K. Sinram; E. Steffens; J. J.M. Steijger; J. Stewart; U. Stösslein; K. Suetsugu; M. Sutter; S. Taroian; A. Terkulov; S. Tessarin; 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; C. Weiskopf; J. Wendland; J. Wilbert; T. Wise; S. Yen; S. Yoneyama; H. Zohrabian

doi:10.1007/s100520100697

Hadron formation in deep-inelastic positron scattering in a nuclear environment

A. Airapetian, N. Akopov, Z. Akopov, I. Akushevich, M. Amarian, J. Arrington, E. C. Aschenauer, H. Avakian, R. Avakian, A. Avetissian, E. Avetissian, P. Bailey, B. Bains, C. Baumgarten, M. Beckmann, S. Belostotski, S. Bernreuther, N. Bianchi, H. Böttcher, A. BorissovM. Bouwhuis, J. Brack, S. Brauksiepe, B. Braun, W. Brückner, A. Brüll, P. Budz, H. J. Bulten, G. P. Capitani, P. Carter, P. Chumney, E. Cisbani, G. R. Court, P. F. Dalpiaz, R. De Leo, L. De Nardo, E. De Sanctis, D. De Schepper, E. Devitsin, P. K.A. de Witt Huberts, P. Di Nezza, V. Djordjadze, M. Düren, A. Dvoredsky, G. Elbakian, J. Ely, A. Fantoni, A. Fechtchenko, L. Felawka, M. Ferro-Luzzi, K. Fiedler, B. W. Filippone, H. Fischer, B. Fox, J. Franz, S. Frullani, Y. Gärber, F. Garibaldi, E. Garutti, G. Gavrilov, V. Gharibyan, A. Golendukhin, G. Graw, O. Grebeniouk, P. W. Green, L. G. Greeniaus, A. Gute, W. Haeberli, M. Hartig, D. Hasch, D. Heesbeen, F. H. Heinsius, M. Henoch, R. Hertenberger, W. H.A. Hesselink, G. Hofman, Y. Holler, R. J. Holt, B. Hommez, G. Iarygin, M. Iodice, A. Izotov, H. E. Jackson, A. Jgoun, P. Jung, R. Kaiser, J. Kanesaka, E. Kinney, A. Kisselev, P. Kitching, H. Kobayashi, N. Koch, K. Königsmann, H. Kolster, V. Korotkov, E. Kotik, V. Kozlov, V. G. Krivokhijine, G. Kyle, L. Lagamba, A. Laziev, P. Lenisa, T. Lindemann, W. Lorenzon, N. C.R. Makins, J. W. Martin, H. Marukyan, F. Masoli, M. McAndrew, K. Mcllhany, R. D. McKeown, F. Meissner, F. Menden, A. Metz, N. Meyners, O. Mikloukho, C. A. Miller, R. Milner, V. Muccifora, R. Mussa, A. Nagaitsev, E. Nappi, Y. Naryshkin, A. Nass, K. Negodaeva, W. D. Nowak, K. Oganessyan, T. G. O'Neill, R. Openshaw, J. Ouyang, B. R. Owen, S. F. Pate, S. Potashov, D. H. Potterveld, G. Rakness, V. Rappoport, R. Redwine, D. Reggiani, A. R. Reolon, R. Ristinen, K. Rith, D. Robinson, A. Rostomyan, M. Ruh, D. Ryckbosch, Y. Sakemi, T. Sato, I. Savin, C. Scarlett, A. Schäfer, C. Schill, F. Schmidt, G. Schnell, K. P. Schüler, A. Schwind, J. Seibert, B. Seitz, T. A. Shibata, T. Shin, V. Shutov, M. C. Simani, A. Simon, K. Sinram, E. Steffens, J. J.M. Steijger, J. Stewart, U. Stösslein, K. Suetsugu, M. Sutter, S. Taroian, A. Terkulov, S. Tessarin, 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, C. Weiskopf, J. Wendland, J. Wilbert, T. Wise, S. Yen, S. Yoneyama, H. Zohrabian

Physics

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

Abstract

The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam. The differential multiplicity of charged hadrons and identified charged pions from nitrogen relative to that from deuterium has been measured as a function of the virtual photon energy v and the fraction z of this energy transferred to the hadron. There are observed substantial reductions of the multiplicity ratio R^h_M at low v and at high z, both of which are well described by a gluon-bremsstrahlung model of hadronization. A significant difference of the v-dependence of R^h_M is found between positive and negative hadrons. This is interpreted in terms of a difference between the formation times of protons and pions, using a phenomenological model to describe the v-and z-dependence of R^h_M.

Original language	English (US)
Pages (from-to)	479-486
Number of pages	8
Journal	European Physical Journal C
Volume	20
Issue number	3
DOIs	https://doi.org/10.1007/s100520100697
State	Published - May 2001

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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Airapetian, A., Akopov, N., Akopov, Z., Akushevich, I., Amarian, M., Arrington, J., Aschenauer, E. C., Avakian, H., Avakian, R., Avetissian, A., Avetissian, E., Bailey, P., Bains, B., Baumgarten, C., Beckmann, M., Belostotski, S., Bernreuther, S., Bianchi, N., Böttcher, H., ... Zohrabian, H. (2001). Hadron formation in deep-inelastic positron scattering in a nuclear environment. European Physical Journal C, 20(3), 479-486. https://doi.org/10.1007/s100520100697

Airapetian, A, Akopov, N, Akopov, Z, Akushevich, I, Amarian, M, Arrington, J, Aschenauer, EC, Avakian, H, Avakian, R, Avetissian, A, Avetissian, E, Bailey, P, Bains, B, Baumgarten, C, Beckmann, M, Belostotski, S, Bernreuther, S, Bianchi, N, Böttcher, H, Borissov, A, Bouwhuis, M, Brack, J, Brauksiepe, S, Braun, B, Brückner, W, Brüll, A, Budz, P, Bulten, HJ, Capitani, GP, Carter, P, Chumney, P, Cisbani, E, Court, GR, Dalpiaz, PF, De Leo, R, De Nardo, L, De Sanctis, E, De Schepper, D, Devitsin, E, de Witt Huberts, PKA, Di Nezza, P, Djordjadze, V, Düren, M, Dvoredsky, A, Elbakian, G, Ely, J, Fantoni, A, Fechtchenko, A, Felawka, L, Ferro-Luzzi, M, Fiedler, K, Filippone, BW, Fischer, H, Fox, B, Franz, J, Frullani, S, Gärber, Y, Garibaldi, F, Garutti, E, Gavrilov, G, Gharibyan, V, Golendukhin, A, Graw, G, Grebeniouk, O, Green, PW, Greeniaus, LG, Gute, A, Haeberli, W, Hartig, M, Hasch, D, Heesbeen, D, Heinsius, FH, Henoch, M, Hertenberger, R, Hesselink, WHA, Hofman, G, Holler, Y, Holt, RJ, Hommez, B, Iarygin, G, Iodice, M, Izotov, A, Jackson, HE, Jgoun, A, Jung, P, Kaiser, R, Kanesaka, J, Kinney, E, Kisselev, A, Kitching, P, Kobayashi, H, Koch, N, Königsmann, K, Kolster, H, Korotkov, V, Kotik, E, Kozlov, V, Krivokhijine, VG, Kyle, G, Lagamba, L, Laziev, A, Lenisa, P, Lindemann, T, Lorenzon, W, Makins, NCR, Martin, JW, Marukyan, H, Masoli, F, McAndrew, M, Mcllhany, K, McKeown, RD, Meissner, F, Menden, F, Metz, A, Meyners, N, Mikloukho, O, Miller, CA, Milner, R, Muccifora, V, Mussa, R, Nagaitsev, A, Nappi, E, Naryshkin, Y, Nass, A, Negodaeva, K, Nowak, WD, Oganessyan, K, O'Neill, TG, Openshaw, R, Ouyang, J, Owen, BR, Pate, SF, Potashov, S, Potterveld, DH, Rakness, G, Rappoport, V, Redwine, R, Reggiani, D, Reolon, AR, Ristinen, R, Rith, K, Robinson, D, Rostomyan, A, Ruh, M, Ryckbosch, D, Sakemi, Y, Sato, T, Savin, I, Scarlett, C, Schäfer, A, Schill, C, Schmidt, F, Schnell, G, Schüler, KP, Schwind, A, Seibert, J, Seitz, B, Shibata, TA, Shin, T, Shutov, V, Simani, MC, Simon, A, Sinram, K, Steffens, E, Steijger, JJM, Stewart, J, Stösslein, U, Suetsugu, K, Sutter, M, Taroian, S, Terkulov, A, Tessarin, S, 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, Weiskopf, C, Wendland, J, Wilbert, J, Wise, T, Yen, S, Yoneyama, S & Zohrabian, H 2001, 'Hadron formation in deep-inelastic positron scattering in a nuclear environment', European Physical Journal C, vol. 20, no. 3, pp. 479-486. https://doi.org/10.1007/s100520100697

@article{f868d0455b824747a0bd5735f60e77ee,

title = "Hadron formation in deep-inelastic positron scattering in a nuclear environment",

abstract = "The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam. The differential multiplicity of charged hadrons and identified charged pions from nitrogen relative to that from deuterium has been measured as a function of the virtual photon energy v and the fraction z of this energy transferred to the hadron. There are observed substantial reductions of the multiplicity ratio RhM at low v and at high z, both of which are well described by a gluon-bremsstrahlung model of hadronization. A significant difference of the v-dependence of RhM is found between positive and negative hadrons. This is interpreted in terms of a difference between the formation times of protons and pions, using a phenomenological model to describe the v-and z-dependence of RhM.",

author = "A. Airapetian and N. Akopov and Z. Akopov and I. Akushevich and M. Amarian and J. Arrington and Aschenauer, {E. C.} and H. Avakian and R. Avakian and A. Avetissian and E. Avetissian and P. Bailey and B. Bains and C. Baumgarten and M. Beckmann and S. Belostotski and S. Bernreuther and N. Bianchi and H. B{\"o}ttcher and A. Borissov and M. Bouwhuis and J. Brack and S. Brauksiepe and B. Braun and W. Br{\"u}ckner and A. Br{\"u}ll and P. Budz 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 Leo}, R. and {De Nardo}, L. and {De Sanctis}, E. and {De Schepper}, D. and E. Devitsin and {de Witt Huberts}, {P. K.A.} and {Di Nezza}, P. and V. Djordjadze and M. D{\"u}ren and A. Dvoredsky and G. Elbakian and J. Ely and A. Fantoni and A. Fechtchenko and L. Felawka and M. Ferro-Luzzi and K. Fiedler and Filippone, {B. W.} and H. Fischer and B. Fox and J. Franz and S. Frullani and Y. G{\"a}rber and F. Garibaldi and E. Garutti and G. Gavrilov and V. Gharibyan and A. Golendukhin and G. Graw and O. Grebeniouk and Green, {P. W.} and Greeniaus, {L. G.} and A. Gute and W. Haeberli and M. Hartig and D. Hasch and D. Heesbeen and Heinsius, {F. H.} and M. Henoch and R. Hertenberger and Hesselink, {W. H.A.} and G. Hofman and Y. Holler and Holt, {R. J.} and B. Hommez and G. Iarygin and M. Iodice and A. Izotov and Jackson, {H. E.} and A. Jgoun and P. Jung and R. Kaiser and J. Kanesaka and E. Kinney and A. Kisselev and P. Kitching and H. Kobayashi and N. Koch and K. K{\"o}nigsmann and H. Kolster and V. Korotkov and E. Kotik and V. Kozlov and Krivokhijine, {V. G.} and G. Kyle and L. Lagamba and A. Laziev and P. Lenisa and T. Lindemann and W. Lorenzon and Makins, {N. C.R.} and Martin, {J. W.} and H. Marukyan and F. Masoli and M. McAndrew and K. Mcllhany and McKeown, {R. D.} and F. Meissner and F. Menden and A. Metz and N. Meyners and O. Mikloukho and Miller, {C. A.} and R. Milner and V. Muccifora and R. Mussa and A. Nagaitsev and E. Nappi and Y. Naryshkin and A. Nass and K. Negodaeva and Nowak, {W. D.} and K. Oganessyan and O'Neill, {T. G.} and R. Openshaw and J. Ouyang and Owen, {B. R.} and Pate, {S. F.} and S. Potashov and Potterveld, {D. H.} and G. Rakness and V. Rappoport and R. Redwine and D. Reggiani and Reolon, {A. R.} and R. Ristinen and K. Rith and D. Robinson and A. Rostomyan and M. Ruh and D. Ryckbosch and Y. Sakemi and T. Sato and I. Savin and C. Scarlett and A. Sch{\"a}fer and C. Schill and F. Schmidt and G. Schnell and Sch{\"u}ler, {K. P.} and A. Schwind and J. Seibert and B. Seitz and Shibata, {T. A.} and T. Shin and V. Shutov and Simani, {M. C.} and A. Simon and K. Sinram and E. Steffens and Steijger, {J. J.M.} and J. Stewart and U. St{\"o}sslein and K. Suetsugu and M. Sutter and S. Taroian and A. Terkulov and S. Tessarin 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 C. Weiskopf and J. Wendland and J. Wilbert and T. Wise and S. Yen and S. Yoneyama and H. Zohrabian",

year = "2001",

month = may,

doi = "10.1007/s100520100697",

language = "English (US)",

volume = "20",

pages = "479--486",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer",

number = "3",

}

TY - JOUR

T1 - Hadron formation in deep-inelastic positron scattering in a nuclear environment

AU - Airapetian, A.

AU - Akopov, N.

AU - Akopov, Z.

AU - Akushevich, I.

AU - Amarian, M.

AU - Arrington, J.

AU - Aschenauer, E. C.

AU - Avakian, H.

AU - Avakian, R.

AU - Avetissian, A.

AU - Avetissian, E.

AU - Bailey, P.

AU - Bains, B.

AU - Baumgarten, C.

AU - Beckmann, M.

AU - Belostotski, S.

AU - Bernreuther, S.

AU - Bianchi, N.

AU - Böttcher, H.

AU - Borissov, A.

AU - Bouwhuis, M.

AU - Brack, J.

AU - Brauksiepe, S.

AU - Braun, B.

AU - Brückner, W.

AU - Brüll, A.

AU - Budz, P.

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 Leo, R.

AU - De Nardo, L.

AU - De Sanctis, E.

AU - De Schepper, D.

AU - Devitsin, E.

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

AU - Di Nezza, P.

AU - Djordjadze, V.

AU - Düren, M.

AU - Dvoredsky, A.

AU - Elbakian, G.

AU - Ely, J.

AU - Fantoni, A.

AU - Fechtchenko, A.

AU - Felawka, L.

AU - Ferro-Luzzi, M.

AU - Fiedler, K.

AU - Filippone, B. W.

AU - Fischer, H.

AU - Fox, B.

AU - Franz, J.

AU - Frullani, S.

AU - Gärber, Y.

AU - Garibaldi, F.

AU - Garutti, E.

AU - Gavrilov, G.

AU - Gharibyan, V.

AU - Golendukhin, A.

AU - Graw, G.

AU - Grebeniouk, O.

AU - Green, P. W.

AU - Greeniaus, L. G.

AU - Gute, A.

AU - Haeberli, W.

AU - Hartig, M.

AU - Hasch, D.

AU - Heesbeen, D.

AU - Heinsius, F. H.

AU - Henoch, M.

AU - Hertenberger, R.

AU - Hesselink, W. H.A.

AU - Hofman, G.

AU - Holler, Y.

AU - Holt, R. J.

AU - Hommez, B.

AU - Iarygin, G.

AU - Iodice, M.

AU - Izotov, A.

AU - Jackson, H. E.

AU - Jgoun, A.

AU - Jung, P.

AU - Kaiser, R.

AU - Kanesaka, J.

AU - Kinney, E.

AU - Kisselev, A.

AU - Kitching, P.

AU - Kobayashi, H.

AU - Koch, N.

AU - Königsmann, K.

AU - Kolster, H.

AU - Korotkov, V.

AU - Kotik, E.

AU - Kozlov, V.

AU - Krivokhijine, V. G.

AU - Kyle, G.

AU - Lagamba, L.

AU - Laziev, A.

AU - Lenisa, P.

AU - Lindemann, T.

AU - Lorenzon, W.

AU - Makins, N. C.R.

AU - Martin, J. W.

AU - Marukyan, H.

AU - Masoli, F.

AU - McAndrew, M.

AU - Mcllhany, 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 - Milner, R.

AU - Muccifora, V.

AU - Mussa, R.

AU - Nagaitsev, A.

AU - Nappi, E.

AU - Naryshkin, Y.

AU - Nass, A.

AU - Negodaeva, K.

AU - Nowak, W. D.

AU - Oganessyan, K.

AU - O'Neill, T. G.

AU - Openshaw, R.

AU - Ouyang, J.

AU - Owen, B. R.

AU - Pate, S. F.

AU - Potashov, S.

AU - Potterveld, D. H.

AU - Rakness, G.

AU - Rappoport, V.

AU - Redwine, R.

AU - Reggiani, D.

AU - Reolon, A. R.

AU - Ristinen, R.

AU - Rith, K.

AU - Robinson, D.

AU - Rostomyan, A.

AU - Ruh, M.

AU - Ryckbosch, D.

AU - Sakemi, Y.

AU - Sato, T.

AU - Savin, I.

AU - Scarlett, C.

AU - Schäfer, A.

AU - Schill, C.

AU - Schmidt, F.

AU - Schnell, G.

AU - Schüler, K. P.

AU - Schwind, A.

AU - Seibert, J.

AU - Seitz, B.

AU - Shibata, T. A.

AU - Shin, T.

AU - Shutov, V.

AU - Simani, M. C.

AU - Simon, A.

AU - Sinram, K.

AU - Steffens, E.

AU - Steijger, J. J.M.

AU - Stewart, J.

AU - Stösslein, U.

AU - Suetsugu, K.

AU - Sutter, M.

AU - Taroian, S.

AU - Terkulov, A.

AU - Tessarin, S.

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 - Weiskopf, C.

AU - Wendland, J.

AU - Wilbert, J.

AU - Wise, T.

AU - Yen, S.

AU - Yoneyama, S.

AU - Zohrabian, H.

PY - 2001/5

Y1 - 2001/5

N2 - The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam. The differential multiplicity of charged hadrons and identified charged pions from nitrogen relative to that from deuterium has been measured as a function of the virtual photon energy v and the fraction z of this energy transferred to the hadron. There are observed substantial reductions of the multiplicity ratio RhM at low v and at high z, both of which are well described by a gluon-bremsstrahlung model of hadronization. A significant difference of the v-dependence of RhM is found between positive and negative hadrons. This is interpreted in terms of a difference between the formation times of protons and pions, using a phenomenological model to describe the v-and z-dependence of RhM.

AB - The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam. The differential multiplicity of charged hadrons and identified charged pions from nitrogen relative to that from deuterium has been measured as a function of the virtual photon energy v and the fraction z of this energy transferred to the hadron. There are observed substantial reductions of the multiplicity ratio RhM at low v and at high z, both of which are well described by a gluon-bremsstrahlung model of hadronization. A significant difference of the v-dependence of RhM is found between positive and negative hadrons. This is interpreted in terms of a difference between the formation times of protons and pions, using a phenomenological model to describe the v-and z-dependence of RhM.

UR - http://www.scopus.com/inward/record.url?scp=0001519102&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001519102&partnerID=8YFLogxK

U2 - 10.1007/s100520100697

DO - 10.1007/s100520100697

M3 - Article

AN - SCOPUS:0001519102

SN - 1434-6044

VL - 20

SP - 479

EP - 486

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -

Hadron formation in deep-inelastic positron scattering in a nuclear environment

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