Measurement of high-pT single electrons from heavy-flavor decays in p + p collisions at square root of s = 200 GeV

Measurement of high-pT single electrons from heavy-flavor decays in p + p collisions at square root of s = 200 GeV

The momentum distribution of electrons from decays of heavy flavor (charm and bottom) for midrapidity absolute value of y < 0.35 in p + p collisions at square root of s = 200 GeV has been measured by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider over the transverse momentum ran...

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Veröffentlicht in:Physical review letters 2006-12, Vol.97 (25), p.252002-252002
Hauptverfasser: Adare, A, Afanasiev, S, Aidala, C, Ajitanand, N N, Akiba, Y, Al-Bataineh, H, Alexander, J, Aoki, K, Aphecetche, L, Armendariz, R, Aronson, S H, Asai, J, Atomssa, E T, Averbeck, R, Awes, T C, Azmoun, B, Babintsev, V, Baksay, G, Baksay, L, Baldisseri, A, Barish, K N, Barnes, P D, Bassalleck, B, Bathe, S, Batsouli, S, Baublis, V, Bazilevsky, A, Belikov, S, Bennett, R, Berdnikov, Y, Bickley, A A, Boissevain, J G, Borel, H, Boyle, K, Brooks, M L, Buesching, H, Bumazhnov, V, Bunce, G, Butsyk, S, Campbell, S, Chang, B S, Charvet, J-L, Chernichenko, S, Chiba, J, Chi, C Y, Chiu, M, Choi, I J, Chujo, T, Chung, P, Churyn, A, Cianciolo, V, Cleven, C R, Cole, B A, Comets, M P, Constantin, P, Csanád, M, Csörgo, T, Dahms, T, Das, K, David, G, Deaton, M B, Dehmelt, K, Delagrange, H, Denisov, A, d'Enterria, D, Deshpande, A, Desmond, E J, Dietzsch, O, Dion, A, Donadelli, M, Drapier, O, Drees, A, Dubey, A K, Durum, A, Dzhordzhadze, V, Efremenko, Y V, Egdemir, J, Ellinghaus, F, Emam, W S, Enokizono, A, En'yo, H, Esumi, S, Eyser, K O, Fields, D E, Finger, Jr, M, Fleuret, F, Fokin, S L, Fraenkel, Z, Franz, A, Frantz, J, Frawley, A D, Fujiwara, K, Fukao, Y, Fusayasu, T, Gadrat, S, Garishvili, I, Glenn, A, Gong, H, Gonin, M, Gosset, J
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Zusammenfassung:The momentum distribution of electrons from decays of heavy flavor (charm and bottom) for midrapidity absolute value of y < 0.35 in p + p collisions at square root of s = 200 GeV has been measured by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider over the transverse momentum range 0.3 < pT < 9 GeV/c. Two independent methods have been used to determine the heavy-flavor yields, and the results are in good agreement with each other. A fixed-order-plus-next-to-leading-log perturbative QCD calculation agrees with the data within the theoretical and experimental uncertainties, with the data/theory ratio of 1.71+/-0.02stat+/-0.18sys for 0.3 < pT < 9 GeV/c. The total charm production cross section at this energy has also been deduced to be sigma cc = 567+/-57stat+/-193sys microb.
ISSN:0031-9007