Measurement of the cross section for prompt isolated diphoton production in pp̄ collisions at √s=1.96 TeV

• Published in: Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2011-09, Vol.84 (5)
• Main Authors: Aaltonen, T., Anastassov, A., Bellinger, J., Beretvas, A., Boudreau, J., Bucciantonio, M., Burkett, K., Calancha, C., Camarda, S., Canelli, F., Canepa, A., Cerrito, L., Chokheli, D., Chung, W. H., Cox, C. A., Culbertson, R., Deluca, C., Demortier, L., Deng, J., Di Canto, A., Dong, P., Ebina, K., Errede, S., Eusebi, R., Farrington, S., Feindt, M., Ferrazza, C., Furic, I., Gerberich, H., Giunta, M., Giurgiu, G., Golossanov, A., Goshaw, A. T., Gresele, A., Haber, C., Harr, R. F., Hatakeyama, K., Hocker, A., Horn, D., Hou, S., Ivanov, A., Jayatilaka, B., Johnson, W., Junk, T. R., Kamon, T., Khotilovich, V., Kilminster, B., Kim, S. H., Klimenko, S., Kondo, K., Krop, D., Krumnack, N., Laasanen, A. T., Lami, S., Lander, R. L., LeCompte, T., Leo, S., Lewis, J. D., Lin, C.-J., Liu, T., Lukens, P., Lys, J., Maksimovic, P., Mehta, A., Menzione, A., Moed, S., Moore, R., Morello, M. J., Napier, A., Nodulman, L., Punzi, G., Ramakrishnan, V., Ristori, L., Safonov, A., Savoy-Navarro, A., Schlabach, P., Schmidt, E. E., Seidel, S., Simonenko, A., Sliwa, K., Smith, J. R., Snider, F. D., Stelzer-Chilton, O., Sudo, Y., Thome, J., Toback, D., Tollefson, K., Tomura, T., Tonelli, D., Torretta, D., Vila, I., Wang, S. M., Wester, W. C., Whiteson, D., Wicklund, A. B., Wilson, P., Wittich, P., Yang, T., Yao, W.-M., Yeh, G. P.
• Format: Article
• Language: English
• ISSN: 1550-7998; 1550-2368
• DOI: 10.1103/PhysRevD.84.052006

This article reports a measurement of the production cross section of prompt isolated photon pairs in proton-antiproton collisions at √s=1.96 TeV using the CDF II detector at the Fermilab Tevatron collider. The data correspond to an integrated luminosity of 5.36 fb⁻¹. The cross section is presented as a function of kinematic variables sensitive to the reaction mechanisms. The results are compared with three perturbative QCD calculations: (1) a leading-order parton shower Monte Carlo, (2) a fixed next-to-leading-order calculation and (3) a next-to-leading-order/next-to-next-to-leading-log resummed calculation. The comparisons show that, within their known limitations, all calculations predict the main features of the data, but no calculation adequately describes all aspects of the data.