Direct photon cross section with conversions at CDF

Acosta, D. et al. (2004) Direct photon cross section with conversions at CDF. Physical Review D, 70(7), art 074008. (doi: 10.1103/PhysRevD.70.074008)

Abstract

We present a measurement of the isolated direct photon cross section in p (p) over bar collisions at roots=1.8 TeV and \eta\ lt 0.9 using data collected between 1994 and 1995 by the Collider Detector at Fermilab (CDF). The measurement is based on events where the photon converts into an electron-positron pair in the material of the inner detector, resulting in a two track event signature. To remove pi(0)→gammagamma and eta→gammagamma events from the data we use a new background subtraction technique which takes advantage of the tracking information available in a photon conversion event. We find that the shape of the cross section as a function of photon p(T) is poorly described by next-to-leading-order QCD predictions, but agrees with previous CDF measurements.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Chen, Mr Yen-Fu and D'Auria, Dr Saverio and Chapman, Professor John and Bell, Dr William
• Authors: Acosta, D., Affolder, T., Albrow, M.G., Ambrose, D., Amidei, D., Anikeev, K., Antos, J., Apollinari, G., Arisawa, T., Artikov, A., Ashmanskas, W., Azfar, F., Azzi-Bacchetta, P., Bacchetta, N., Bachacou, H., Badgett, W., Barbaro-Galtieri, A., Barnes, V.E., Barnett, B.A., Baroiant, S., Barone, M., Bauer, G., Bedeschi, F., Behari, S., Belforte, S., Bell, W.H., Bellettini, G., Bellinger, J., Benjamin, D., Beretvas, A., Bhatti, A., Binkley, M., Bisello, D., Bishai, M., Blair, R.E., Blocker, C., Bloom, K., Blumenfeld, B., Bocci, A., Bodek, A., Bolla, G., Bolshov, A., Bortoletto, D., Boudreau, J., Bromberg, C., Brubaker, E., Budagov, J., Budd, H.S., Burkett, K., Busetto, G., Byrum, K.L., Cabrera, S., Campbell, M., Carithers, W., Carlsmith, D., Castro, A., Cauz, D., Cerri, A., Cerrito, L., Chapman, J.N., Chen, C., Chen, Y.C., Chertok, M., Chiarelli, G., Chlachidze, G., Chlebana, F., Chu, M.L., Chung, J.Y., Chung, W.H., Chung, Y.S., Ciobanu, C.I., Clark, A.G., Coca, M., Connolly, A., Convery, M., Conway, J., Cordelli, M., Cranshaw, J., Culbertson, R., Dagenhart, D., D'Auria, S., de Barbaro, P., De Cecco, S., Dell'Agnello, S., Dell'Orso, M., Demers, S., Demortier, L., Deninno, M., De Pedis, D., Derwent, P.F., Dionisi, C., Dittmann, J.R., Dominguez, A., Donati, S., D'Onofrio, M., Dorigo, T., Eddy, N., Erbacher, R., Errede, D., Errede, S., Eusebi, R., Farrington, S., Feild, R.G., Fernandez, J.P., Ferretti, C., Field, R.D., Fiori, I., Flaugher, B., Flores-Castillo, L.R., Foster, G.W., Franklin, M., Friedman, J., Furic, I., Gallinaro, M., Garcia-Sciveres, M., Garfinkel, A.F., Gay, C., Gerdes, D.W., Gerstein, E., Giagu, S., Giannetti, P., Giolo, K., Giordani, M., Giromini, P., Glagolev, V., Glenzinski, D., Gold, M., Goldschmidt, N., Goldstein, J., Gomez, G., Goncharov, M., Gorelov, I., Goshaw, A.T., Gotra, Y., Goulianos, K., Gresele, A., Grosso-Pilcher, C., Guenther, M., da Costa, J.G., Haber, C., Hahn, S.R., Halkiadakis, E., Hall, C., Handler, R., Happacher, F., Hara, K., Harris, R.M., Hartmann, F., Hatakeyama, K., Hauser, J., Heinrich, J., Hennecke, M., Herndon, M., Hill, C., Hocker, A., Hoffman, K.D., Hou, S., Huffman, B.T., Hughes, R., Huston, J., Issever, C., Incandela, J., Introzzi, G., Iori, M., Ivanov, A., Iwata, Y., Iyutin, B., James, E., Jones, M., Kamon, T., Kang, J., Unel, M.K., Kartal, S., Kasha, H., Kato, Y., Kennedy, R.D., Kephart, R., Kilminster, B., Kim, D.H., Kim, H.S., Kim, M.J., Kim, S.B., Kim, S.H., Kim, T.H., Kim, Y.K., Kirby, M., Kirsch, L., Klimenko, S., Koehn, P., Kondo, K., Konigsberg, J., Korn, A., Korytov, A., Kroll, J., Kruse, M., Krutelyov, V., Kuhlmann, S.E., Kuznetsova, N., Laasanen, A.T., Lami, S., Lammel, S., Lancaster, J., Lannon, K., Lancaster, M., Lander, R., Lath, A., Latino, G., LeCompte, T., Le, Y., Lee, J., Lee, S.W., Leonardo, N., Leone, S., Lewis, J.D., Li, K., Lin, C.S., Lindgren, M., Liss, T.M., Liu, T., Litvintsev, D.O., Lockyer, N.S., Loginov, A., Loreti, M., Lucchesi, D., Lukens, P., Lyons, L., Lys, J., Madrak, R., Maeshima, K., Maksimovic, P., Malferrari, L., Mangano, M., Manca, G., Mariotti, M., Martin, M., Martin, A., Martin, V., Martinez, M., Mazzanti, P., McFarland, K.S., McIntyre, P., Menguzzato, M., Menzione, A., Merkel, P., Mesropian, C., Meyer, A., Miao, T., Miller, R., Miller, J.S., Miscetti, S., Mitselmakher, G., Moggi, N., Moore, R., Moulik, T., and Mulhearn, M.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review D
• Publisher: American Physical Society
• ISSN: 1550-7998
• ISSN (Online): 1089-4918