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| 題名: | Measurement of neutral strange particle production in the underlying event in proton-proton collisions at √s=7 TeV |
| 作者: | 余欣珊;Chatrchyan, S.;Waltenberger, W.;Kalogeropoulos, A.;Walsh, S.;Vutova, M.;Kozhuharov, V.;Wang, X.;Polic, D.;Luetic, J.;Fedi, G.;Lassila-Perini, K.;Besancon, M.;Beaudette, F.;Charlot, C.;Dahms, T.;Agram, J.-L.;Lethuillier, M.;Sordini, V.;Haj Ahmad, W.;Calligaris, L.;Kasemann, M.;Petrukhin, A.;Heinrich, M.;Simonis, H. J.;Nishu, N.;Colaleo, A.;Verwilligen, P.;Ghezzi, A.;Malvezzi, S.;Paganoni, M.;Tabarelli de Fatis, T.;Giassi, A.;Kraan, A.;Micheli, F.;Nourbakhsh, S.;Montanino, D.;Shoaib, M.;Brona, G.;Kirsanov, M.;Tourtchanovitch, L.;Gonzalez Lopez, O.;Cuevas, J.;Marco, J.;Vilar Cortabitarte, R.;Auzinger, G.;Funk, W.;Moser, R.;Siegrist, P.;Stoye, M.;Ingram, Q.;Bachmair, F.;Takahashi, M.;Hsiung, Y.;Aliev, T.;Bilmis, S.;Newbold, D. M.;Bell, K. W.;Petyt, D.;Buchmuller, O.;Cripps, N.;Guneratne Bryer, A.;Jarvis, M.;Raymond, D. M.;Wakefield, S.;Leslie, D.;Turner, M.;Lazic, D.;Ko, W.;Lander, R.;Valuev, V.;Clare, R.;Pieri, M.;Spiropulu, M.;Paulini, M.;Russ, J.;Vorobiev, I.;Wagner, S. R.;Berryhill, J.;Green, D.;Ratnikova, N.;Drozdetskiy, A.;Low, J. F.;Hofman, D. J.;Hadley, N. J.;Kellogg, R. G.;Kolberg, T.;Goncharov, M.;Bloom, K.;Planer, M.;Wayne, M.;Tully, C.;Benedetti, D.;Bolla, G.;Merkel, P.;Yang, Z. C.;Roe, J.;Dragoiu, C.;Volobouev, I.;Boutle, S.;Ojalvo, I. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | Baryons;Charged particles;Collisions;Computer simulation;Mesons;Monte Carlo methods;Partons;Transverse momentum |
| 日期: | 2013-09-03 |
| 上傳時間: | 2026-04-23 12:11:32 (UTC+8) |
| 摘要: | 摘要： (ProQuest: ... denotes formulae and/or non-USASCII text omitted) Measurements are presented of the production of primary ... and [Lambda] particles in proton-proton collisions at [radical]s = 7 TeV in the region transverse to the leading charged-particle jet in each event. The average multiplicity and average scalar transverse momentum sum of ... and [Lambda] particles measured at pseudorapidities [eta]< 2 rise with increasing charged-particle jet p sub(T) in the range 1-10 GeV/c and saturate in the region 10-50 GeV/c. The rise and saturation of the strange-particle yields and transverse momentum sums in the underlying event are similar to those observed for inclusive charged particles, which confirms the impact-parameter picture of multiple parton interactions. The results are compared to recent tunes of the pythia Monte Carlo event generator. The PYTHIA simulations underestimate the data by 15%-30% for ... mesons and by about 50% for [Lambda] baryons, a deficit similar to that observed for the inclusive strange-particle production in non-single-diffractive proton-proton collisions. The constant strange- to charged-particle activity ratios with respect to the leading jet p sub(T) and similar trends for mesons and baryons indicate that the multiparton-interaction dynamics is decoupled from parton hadronization, which occurs at a later stage.
出版日期： 2013-09-03
出處： Physical review. D, Particles, fields, gravitation, and cosmology, 2013-09, Vol.88 (5), Article 052001
識別號： ISSN: 1550-7998
識別號： EISSN: 1550-2368
識別號： DOI: 10.1103/PhysRevD.88.052001 |
| 顯示於類別: | [物理學系] 期刊論文
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