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4 results on '"Baryon junctions"'

1. Forward and midrapidity like-particle ratios from collisions at

Author

Bearden, I.G., Beavis, D., Besliu, C., Budick, B., Bøggild, H., Chasman, C., Christensen, C.H., Christiansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhøje, J.J., Germinario, M., Hagel, K., Holm, A., Holme, A.K., Ito, H., Jakobsen, E., Jipa, A., and Jundt, F.

Subjects
*BARYONS, *PARTICLES (Nuclear physics), *NUCLEAR physics, *PROTONS, *FERMIONS
Abstract

Abstract: We present a measurement of , and from collisions at over the rapidity range . For we see no significant transverse momentum dependence of the ratios. All three ratios are independent of rapidity for and then steadily decline from to . The ratio is below unity for . The ratio is very similar for and 20% central Au+Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark–diquark breaking mechanisms overestimate the ratio up to . Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data. [Copyright &y& Elsevier]

Published
2005
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2. Forward and midrapidity like-particle ratios from p+p collisions at root s=200 GeV

Author

Bearden, IG, Beavis, D, Besliu, C, Budick, B, Boggild, H, Chasman, C, Christensen, CH, Christiansen, P, Cibor, J, Debbe, R, Enger, E, Gaardhoje, JJ, Germinario, M, Hagel, K, Holm, A, Holme, AK, Ito, H, Jakobsen, E, Jipa, A, Jundt, F, Jordre, JI, Jørdre, Jens Ivar, Jorgensen, CE, Karabowicz, R, Keutgen, T, Kim, EJ, Kozik, T, Larsen, T.M., Lee, JH, Lee, YK, Løvhøiden, Gunnar, Majka, Z, Makeev, A, Mikelsen, M, Murray, MJ, Natowitz, J, Nielsen, BS, Norris, J, Olchanski, K, Ouerdane, D, Planeta, R, Rami, F, Ristea, C, Rohrich, D, Røhrich, Dieter, Samset, B.H., Sandberg, D, Sanders, SJ, Scheetz, RA, Staszel, P, Tveter, T.S., Videbaek, F, Wada, R, Wieloch, A, Yin, Zhongbaao, and Zgura, IS

Subjects
Particle ratios, Forward rapidity, Limiting fragmentation, Baryon junctions, Proton collisions
Abstract

We present a measurement of π−/π+π−/π+, K−/K+K−/K+ and p¯/p from p+pp+p collisions at s=200 GeV over the rapidity range 02.0y>2.0. The p¯/p ratio is very similar for p+pp+p and 20% central Au + Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark–diquark breaking mechanisms overestimate the p¯/p ratio up to y≲3y≲3. Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data. publishedVersion

Published
2005

3. Forward and midrapidity like-particle ratios from p+p collisions at sqrt(s)=200 GeV

Author

Bearden, I.G., Beavis, D., Besliu, C., Budick, B., Boggild, H., Chasman, C., Christensen, C.H., Chrisitansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhoje, J.J., Germinario, M., Hagel, K., Holm, A., Holme, A.K., Ito, H., Jacobsen, E., Jipa, A., Jundt, F., Jordre, J.I., Jorgensen, C.E., Karabowicz, R., Keutgen, T., Kim, E.J., Kozik, T., Larsen, T.M., Lee, J.H., Lee, Y.K., Lovhoiden, G., Majka, Z., Makeev, A., Mikelsen, M., Murray, M.J., Natowitz, J., Nielsen, B.S., Norris, J., Olchanski, K., Ouerdane, D., Planeta, R., Rami, F., Ristea, C., Röhrich, D., Samset, B.H., Sandberg, D., Sanders, S.J., Scheetz, R.A., Staszel, P., Tveter, T.S., Videbaek, F., Wada, R., Wieloch, A., Yin, Z., Zgura, I.S., Collaboration, Brahms, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and BRAHMS

Subjects
baryon junctions, limiting fragmentation, forward rapidity, FOS: Physical sciences, proton collisions, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment, 25.75.q, 25.40.-h, 13.75.-n, particle ratios
Abstract

We present a measurement of pi-\pi+, K-/K+ and pbar/p from p+p collisions at sqrt(s) = 20 0GeV over the rapidity range 0 2.0. The pbar/p ratio is very similar for p+p and 20% central Au+Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark-diquark breaking mechanisms overestimate the pbar/p ratio up to y ~< 3. Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data., Comment: 15 pages, 4 figures, uses elsart.sty. Changes to references and discussion based on referee comments, resubmitted to Phys. Lett. B

Published
2004
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4. Forward and midrapidity like-particle ratios from p+p collisions at s=200 GeV

Author

Bearden, I.G., Beavis, D., Besliu, C., Budick, B., Bøggild, H., Chasman, C., Christensen, C.H., Christiansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhøje, J.J., Germinario, M., Hagel, K., Holm, A., Holme, A.K., Ito, H., Jakobsen, E., Jipa, A., Jundt, F., Jørdre, J.I., Jørgensen, C.E., Karabowicz, R., Keutgen, T., Kim, E.J., Kozik, T., Larsen, T.M., Lee, J.H., Lee, Y.K., Løvhøiden, G., Majka, Z., Makeev, A., Mikelsen, M., Murray, M.J., Natowitz, J., Nielsen, B.S., Norris, J., Olchanski, K., Ouerdane, D., Płaneta, R., Rami, F., Ristea, C., Röhrich, D., Samset, B.H., Sandberg, D., Sanders, S.J., Scheetz, R.A., Staszel, P., Tveter, T.S., Videbæk, F., Wada, R., Wieloch, A., Yin, Z., and Zgura, I.S.

Subjects
Particle ratios, Forward rapidity, Limiting fragmentation, Baryon junctions, Proton collisions
Abstract

We present a measurement of π−/π+, K−/K+ and p¯/p from p+p collisions at s=200 GeV over the rapidity range 02.0. The p¯/p ratio is very similar for p+p and 20% central Au+Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark–diquark breaking mechanisms overestimate the p¯/p ratio up to y≲3. Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data.

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