Strange particle production in pp collisions at $ \sqrt {s} = 0.9 $ and 7 TeV

• Published in: The journal of high energy physics 2011-05, Vol.2011 (5), Article 64
• Main Authors: Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hammer, J., Hänsel, S., Hartl, C., Hoch, M., Hörmann, N., Hrubec, J., Jeitler, M., Kasieczka, G., Kiesenhofer, W., Krammer, M., Liko, D., Mikulec, I., Pernicka, M., Rohringer, H., Schöfbeck, R., Strauss, J., Taurok, A., Teischinger, F., Wagner, P., Waltenberger, W., Walzel, G., Widl, E., Wulz, C.-E., Mossolov, V., Shumeiko, N., Suarez Gonzalez, J., Benucci, L., Cerny, K., De Wolf, E. A., Janssen, X., Maes, T., Mucibello, L., Ochesanu, S., Roland, B., Rougny, R., Selvaggi, M., Van Haevermaet, H., Van Mechelen, P., Van Remortel, N., Beauceron, S., Blekman, F., Blyweert, S., D’Hondt, J., Devroede, O., Gonzalez Suarez, R., Kalogeropoulos, A., Maes, J., Maes, M., Tavernier, S., Van Doninck, W., Van Mulders, P., Van Onsem, G. P., Villella, I., Charaf, O., Clerbaux, B., De Lentdecker, G., Dero, V., Gay, A. P. R., Hammad, G. H., Hreus, T., Marage, P. E., Thomas, L., Vander Velde, C., Vanlaer, P., Wickens, J., Adler, V., Costantini, S., Grunewald, M., Klein, B., Marinov, A., Mccartin, J., Ryckbosch, D., Thyssen, F., Tytgat, M., Vanelderen, L., Verwilligen, P., Walsh, S., Zaganidis, N., Basegmez, S., Bruno, G., Caudron, J., Ceard, L., De Favereau De Jeneret, J., Delaere, C., Demin, P., Favart, D., Giammanco, A., Grégoire, G., Hollar, J.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 1029-8479; 1126-6708; 1029-8479
• DOI: 10.1007/JHEP05(2011)064

The spectra of strange hadrons are measured in proton-proton collisions, recorded by the CMS experiment at the CERN LHC, at centre-of-mass energies of 0.9 and 7 TeV. The K^0_s, Lambda, and Xi^- particles and their antiparticles are reconstructed from their decay topologies and the production rates are measured as functions of rapidity and transverse momentum. The results are compared to other experiments and to predictions of the PYTHIA Monte Carlo program. The transverse momentum distributions are found to differ substantially from the PYTHIA results and the production rates exceed the predictions by up to a factor of three.