Hadronization in semi-inclusive deep-inelastic scattering on nuclei

by: A Airapetian, N Akopov, Z Akopov, EC Aschenauer, W Augustyniak, R Avakian, A Avetissian, E Avetissian, N Bianchi, HP Blok, H Böttcher, C Bonomo, A Borissov, A Brüll, V Bryzgalov, M Capiluppi, GP Capitani, E Cisbani, G Ciullo, M Contalbrigo, PF Dalpiaz, W Deconinck, R De Leo, M Demey, L De Nardo, E De Sanctis, M Diefenthaler, P Di Nezza, J Dreschler, M Düren, M Ehrenfried, G Elbakian, F Ellinghaus, U Elschenbroich, R Fabbri, A Fantoni, S Frullani, D Gabbert, G Gapienko, V Gapienko, F Garibaldi, G Gavrilov, V Gharibyan, F Giordano, S Gliske, L Grigoryan, C Hadjidakis, M Hartig, D Hasch, T Hasegawa, G Hill, A Hillenbrand, M Hoek, B Hommez, I Hristova, Y Imazu, A Ivanilov, HE Jackson, R Kaiser, T Keri, E Kinney, A Kisselev, M Kopytin, V Korotkov, P Kravchenko, L Lagamba, R Lamb, L Lapikás, I Lehmann, P Lenisa, P Liebing, LA Linden-Levy, W Lorenzon, S Lu, X Lu, B Maiheu, NCR Makins, B Marianski, H Marukyan, V Mexner, CA Miller, Y Miyachi, V Muccifora, M Murray, A Mussgiller, E Nappi, Y Naryshkin, A Nass, M Negodaev, WD Nowak, LL Pappalardo, R Perez-Benito, N Pickert, M Raithel, D Reggiani, PE Reimer, A Reischl, AR Reolon, C Riedl, K Rith, SE Rock, G Rosner, A Rostomyan, L Rubacek, J Rubin, D Ryckbosch, Y Salomatin, A Schäfer, G Schnell, B Seitz, C Shearer, TA Shibata, V Shutov, M Stancari, M Statera, JJM Steijger, H Stenzel, J Stewart, F Stinzing, J Streit, S Taroian, B Tchuiko, A Trzcinski, M Tytgat, A Vandenbroucke, PB van der Nat, G van der Steenhoven, Y van Haarlem, C van Hulse, M Varanda, D Veretennikov, V Vikhrov, I Vilardi, C Vogel, S Wang, S Yaschenko, Y Ye, Z Ye, S Yen, W Yu, D Zeiler, B Zihlmann, P Zupranski

Nuclear Physics B, Vol. 780, No. 1-2. (24 September 2007), pp. 1-27.

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Abstract

A series of semi-inclusive deep-inelastic scattering measurements on deuterium, helium, neon, krypton, and xenon targets has been performed in order to study hadronization. The data were collected with the HERMES detector at the DESY laboratory using a 27.6 GeV positron or electron beam. Hadron multiplicities on nucleus A relative to those on the deuteron, , are presented for various hadrons ([pi]+, [pi]-, [pi]0, K+, K-, p, and ) as a function of the virtual-photon energy [nu], the fraction z of this energy transferred to the hadron, the photon virtuality Q2, and the hadron transverse momentum squared . The data reveal a systematic decrease of with the mass number A for each hadron type h. Furthermore, increases (decreases) with increasing values of [nu] (z), increases slightly with increasing Q2, and is almost independent of , except at large values of . For pions two-dimensional distributions also are presented. These indicate that the dependences of on [nu] and z can largely be described as a dependence on a single variable Lc, which is a combination of [nu] and z. The dependence on Lc suggests in which kinematic conditions partonic and hadronic mechanisms may be dominant. The behaviour of at large constitutes tentative evidence for a partonic energy-loss mechanism. The A-dependence of is investigated as a function of [nu], z, and of Lc. It approximately follows an A[alpha] form with [alpha][approximate]0.5-0.6.

@article{Airapetian:2007vu, abstract = {A series of semi-inclusive deep-inelastic scattering measurements on deuterium, helium, neon, krypton, and xenon targets has been performed in order to study hadronization. The data were collected with the HERMES detector at the DESY laboratory using a 27.6 GeV positron or electron beam. Hadron multiplicities on nucleus A relative to those on the deuteron, , are presented for various hadrons ([pi]+, [pi]-, [pi]0, K+, K-, p, and ) as a function of the virtual-photon energy [nu], the fraction z of this energy transferred to the hadron, the photon virtuality Q2, and the hadron transverse momentum squared . The data reveal a systematic decrease of with the mass number A for each hadron type h. Furthermore, increases (decreases) with increasing values of [nu] (z), increases slightly with increasing Q2, and is almost independent of , except at large values of . For pions two-dimensional distributions also are presented. These indicate that the dependences of on [nu] and z can largely be described as a dependence on a single variable Lc, which is a combination of [nu] and z. The dependence on Lc suggests in which kinematic conditions partonic and hadronic mechanisms may be dominant. The behaviour of at large constitutes tentative evidence for a partonic energy-loss mechanism. The A-dependence of is investigated as a function of [nu], z, and of Lc. It approximately follows an A[alpha] form with [alpha][approximate]0.5-0.6.}, author = {Airapetian, A. and Akopov, N. and Akopov, Z. and Aschenauer, E. C. and Augustyniak, W. and Avakian, R. and Avetissian, A. and Avetissian, E. and Bianchi, N. and Blok, H. P. and B\"{o}ttcher, H. and Bonomo, C. and Borissov, A. and Br\"{u}ll, A. and Bryzgalov, V. and Capiluppi, M. and Capitani, G. P. and Cisbani, E. and Ciullo, G. and Contalbrigo, M. and Dalpiaz, P. F. and Deconinck, W. and De Leo, R. and Demey, M. and De Nardo, L. and De Sanctis, E. and Diefenthaler, M. and Di Nezza, P. and Dreschler, J. and D\"{u}ren, M. and Ehrenfried, M. and Elbakian, G. and Ellinghaus, F. and Elschenbroich, U. and Fabbri, R. and Fantoni, A. and Frullani, S. and Gabbert, D. and Gapienko, G. and Gapienko, V. and Garibaldi, F. and Gavrilov, G. and Gharibyan, V. and Giordano, F. and Gliske, S. and Grigoryan, L. and Hadjidakis, C. and Hartig, M. and Hasch, D. and Hasegawa, T. and Hill, G. and Hillenbrand, A. and Hoek, M. and Hommez, B. and Hristova, I. and Imazu, Y. and Ivanilov, A. and Jackson, H. E. and Kaiser, R. and Keri, T. and Kinney, E. and Kisselev, A. and Kopytin, M. and Korotkov, V. and Kravchenko, P. and Lagamba, L. and Lamb, R. and Lapik\'{a}s, L. and Lehmann, I. and Lenisa, P. and Liebing, P. and Linden-Levy, L. A. and Lorenzon, W. and Lu, S. and Lu, X. and Maiheu, B. and Makins, N. C. R. and Marianski, B. and Marukyan, H. and Mexner, V. and Miller, C. A. and Miyachi, Y. and Muccifora, V. and Murray, M. and Mussgiller, A. and Nappi, E. and Naryshkin, Y. and Nass, A. and Negodaev, M. and Nowak, W. D. and Pappalardo, L. L. and Perez-Benito, R. and Pickert, N. and Raithel, M. and Reggiani, D. and Reimer, P. E. and Reischl, A. and Reolon, A. R. and Riedl, C. and Rith, K. and Rock, S. E. and Rosner, G. and Rostomyan, A. and Rubacek, L. and Rubin, J. and Ryckbosch, D. and Salomatin, Y. and Sch\"{a}fer, A. and Schnell, G. and Seitz, B. and Shearer, C. and Shibata, T. A. and Shutov, V. and Stancari, M. and Statera, M. and Steijger, J. J. M. and Stenzel, H. and Stewart, J. and Stinzing, F. and Streit, J. and Taroian, S. and Tchuiko, B. and Trzcinski, A. and Tytgat, M. and Vandenbroucke, A. and van der Nat, P. B. and van der Steenhoven, G. and van Haarlem, Y. and van Hulse, C. and Varanda, M. and Veretennikov, D. and Vikhrov, V. and Vilardi, I. and Vogel, C. and Wang, S. and Yaschenko, S. and Ye, Y. and Ye, Z. and Yen, S. and Yu, W. and Zeiler, D. and Zihlmann, B. and Zupranski, P. }, citeulike-article-id = {2841550}, doi = {http://dx.doi.org/10.1016/j.nuclphysb.2007.06.004}, journal = {Nuclear Physics B}, keywords = {experiment, hadronization, ndis}, month = {September}, number = {1-2}, pages = {1--27}, posted-at = {2008-05-28 17:03:08}, priority = {2}, title = {Hadronization in semi-inclusive deep-inelastic scattering on nuclei}, url = {http://dx.doi.org/10.1016/j.nuclphysb.2007.06.004}, volume = {780}, year = {2007} }

RIS record

TY - JOUR ID - Airapetian:2007vu L3 - citeulike-article-id:2841550 TI - Hadronization in semi-inclusive deep-inelastic scattering on nuclei JF - Nuclear Physics B VL - 780 IS - 1-2 SP - 1 EP - 27 N2 - A series of semi-inclusive deep-inelastic scattering measurements on deuterium, helium, neon, krypton, and xenon targets has been performed in order to study hadronization. The data were collected with the HERMES detector at the DESY laboratory using a 27.6 GeV positron or electron beam. Hadron multiplicities on nucleus A relative to those on the deuteron, , are presented for various hadrons ([pi]+, [pi]-, [pi]0, K+, K-, p, and ) as a function of the virtual-photon energy [nu], the fraction z of this energy transferred to the hadron, the photon virtuality Q2, and the hadron transverse momentum squared . The data reveal a systematic decrease of with the mass number A for each hadron type h. Furthermore, increases (decreases) with increasing values of [nu] (z), increases slightly with increasing Q2, and is almost independent of , except at large values of . For pions two-dimensional distributions also are presented. These indicate that the dependences of on [nu] and z can largely be described as a dependence on a single variable Lc, which is a combination of [nu] and z. The dependence on Lc suggests in which kinematic conditions partonic and hadronic mechanisms may be dominant. The behaviour of at large constitutes tentative evidence for a partonic energy-loss mechanism. The A-dependence of is investigated as a function of [nu], z, and of Lc. It approximately follows an A[alpha] form with [alpha][approximate]0.5-0.6. KW - experiment KW - hadronization KW - ndis AU - Airapetian, A AU - Akopov, N AU - Akopov, Z AU - Aschenauer, EC AU - Augustyniak, W AU - Avakian, R AU - Avetissian, A AU - Avetissian, E AU - Bianchi, N AU - Blok, HP AU - Böttcher, H AU - Bonomo, C AU - Borissov, A AU - Brüll, A AU - Bryzgalov, V AU - Capiluppi, M AU - Capitani, GP AU - Cisbani, E AU - Ciullo, G AU - Contalbrigo, M AU - Dalpiaz, PF AU - Deconinck, W AU - De Leo, R AU - Demey, M AU - De Nardo, L AU - De Sanctis, E AU - Diefenthaler, M AU - Di Nezza, P AU - Dreschler, J AU - Düren, M AU - Ehrenfried, M AU - Elbakian, G AU - Ellinghaus, F AU - Elschenbroich, U AU - Fabbri, R AU - Fantoni, A AU - Frullani, S AU - Gabbert, D AU - Gapienko, G AU - Gapienko, V AU - Garibaldi, F AU - Gavrilov, G AU - Gharibyan, V AU - Giordano, F AU - Gliske, S AU - Grigoryan, L AU - Hadjidakis, C AU - Hartig, M AU - Hasch, D AU - Hasegawa, T AU - Hill, G AU - Hillenbrand, A AU - Hoek, M AU - Hommez, B AU - Hristova, I AU - Imazu, Y AU - Ivanilov, A AU - Jackson, HE AU - Kaiser, R AU - Keri, T AU - Kinney, E AU - Kisselev, A AU - Kopytin, M AU - Korotkov, V AU - Kravchenko, P AU - Lagamba, L AU - Lamb, R AU - Lapikás, L AU - Lehmann, I AU - Lenisa, P AU - Liebing, P AU - Linden-Levy, LA AU - Lorenzon, W AU - Lu, S AU - Lu, X AU - Maiheu, B AU - Makins, NCR AU - Marianski, B AU - Marukyan, H AU - Mexner, V AU - Miller, CA AU - Miyachi, Y AU - Muccifora, V AU - Murray, M AU - Mussgiller, A AU - Nappi, E AU - Naryshkin, Y AU - Nass, A AU - Negodaev, M AU - Nowak, WD AU - Pappalardo, LL AU - Perez-Benito, R AU - Pickert, N AU - Raithel, M AU - Reggiani, D AU - Reimer, PE AU - Reischl, A AU - Reolon, AR AU - Riedl, C AU - Rith, K AU - Rock, SE AU - Rosner, G AU - Rostomyan, A AU - Rubacek, L AU - Rubin, J AU - Ryckbosch, D AU - Salomatin, Y AU - Schäfer, A AU - Schnell, G AU - Seitz, B AU - Shearer, C AU - Shibata, TA AU - Shutov, V AU - Stancari, M AU - Statera, M AU - Steijger, JJM AU - Stenzel, H AU - Stewart, J AU - Stinzing, F AU - Streit, J AU - Taroian, S AU - Tchuiko, B AU - Trzcinski, A AU - Tytgat, M AU - Vandenbroucke, A AU - van der Nat, PB AU - van der Steenhoven, G AU - van Haarlem, Y AU - van Hulse, C AU - Varanda, M AU - Veretennikov, D AU - Vikhrov, V AU - Vilardi, I AU - Vogel, C AU - Wang, S AU - Yaschenko, S AU - Ye, Y AU - Ye, Z AU - Yen, S AU - Yu, W AU - Zeiler, D AU - Zihlmann, B AU - Zupranski, P PY - 2007/09/24/ UR - http://dx.doi.org/10.1016/j.nuclphysb.2007.06.004 ER -

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