Measurements of D0 and D * production in p+p collisions at √s=200GeV

Adamczyk, Agakishiev, Aggarwal, Ahammed, Alakhverdyants, Alekseev, Alford, Anderson, Anson, Arkhipkin, Aschenauer, Averichev, Balewski, Banerjee, Barnovska, Beavis, Bellwied, Betancourt, Betts, Bhasin, Bhati, Bichsel, Bielcik, Bielcikova, Bland, Bordyuzhin, Borowski, Bouchet, Brandin, Brovko, Bruna, Bueltmann, Bunzarov, Burton, Butterworth, Cai, Caines, Calderón De La Barca Sánchez, Cebra, Cendejas, Cervantes, Chaloupka, Chattopadhyay, Chen, Cheng, Cherney, Chikanian, Christie, Chung, Chwastowski, Codrington, Corliss, Cramer, Crawford, Cui, Davila Leyva, De Silva, Debbe, Dedovich, Deng, Derradi De Souza, Dhamija, Didenko, Ding, Dion, Djawotho, Dong, Drachenberg, Draper, Du, Dunkelberger, Dunlop, Efimov, Elnimr, Engelage, Eppley, Eun, Evdokimov, Fatemi, Fazio, Fedorisin, Fersch, Filip, Finch, Fisyak, Gagliardi, Gangadharan, Geurts, Gliske, Gorbunov, Grebenyuk, Grosnick, Gupta, Guryn, Haag, Hajkova, Hamed, Han, Harris, Hays-Wehle, Heppelmann, Hirsch, Hoffmann, Hofman, Horvat, Huang, Huck, Humanic, Huo, Igo, Jacobs, Jena, Joseph, Judd, Kabana, Kang, Kapitan, Kauder, Ke, Keane, Kechechyan, Kesich, Kettler, Kikola, Kiryluk, Kisiel, Kizka, Klein, Koetke, Kollegger, Konzer, Koralt, Koroleva, Korsch, Kotchenda, Kravtsov, Krueger, Kumar, Lamont, Landgraf, Lapointe, Lauret, Lebedev, Lednicky, Lee, Leight, Levine, Li, Lima, Lisa, Liu, Ljubicic, Llope, Longacre, Lu, Luo, Luszczak, Ma, Madagodagettige Don, Mahapatra, Majka, Mall, Margetis, Markert, Masui, Matis, McDonald, McShane, Mioduszewski, Mitrovski, Mohammed, Mohanty, Morozov, Munhoz, Mustafa, Naglis, Nandi, Nasim, Nayak, Nogach, Novak, Odyniec, Ogawa, Oh, Ohlson, Okorokov, Oldag, Oliveira, Olson, Ostrowski, Pachr, Page, Pal, Pan, Pandit, Panebratsev, Pawlak, Pawlik, Pei, Perkins, Peryt, Pile, Planinic, Pluta, Plyku, Poljak, Porter, Poskanzer, Powell, Prindle, Pruneau, Pruthi, Przybycien, Pujahari, Putschke, Qiu, Raniwala, Ray, Redwine, Reed, Riley, Ritter, Roberts, Rogachevskiy, Romero, Ross, Ruan, Rusnak, Sahoo, Sakrejda, Salur, Sandacz, Sandweiss, Sangaline, Sarkar, Schambach, Scharenberg, Schmah, Schmidke, Schmitz, Schuster, Seele, Seger, Seyboth, Shah, Shahaliev, Shao, Sharma, Shi, Shou, Sichtermann, Singaraju, Skoby, Smirnov, Solanki, Sorensen, Desouza, Spinka, Srivastava, Stanislaus, Steadman, Stevens, Stock, Strikhanov, Stringfellow, Suaide, Suarez, Sumbera, Sun, Surrow, Svirida, Symons, Szanto De Toledo, Takahashi, Tang, Tarini, Tarnowsky, Thein, Thomas, Tian, Timmins, Tlusty, Tokarev, Trainor, Trentalange, Tribble, Tribedy, Trzeciak, Tsai, Turnau, Ullrich, Underwood, Van Buren, Van Nieuwenhuizen, Vanfossen, Varma, Vasconcelos, Videbæk, Viyogi, Vokal, Voloshin, Vossen, Wada, Wang, Webb, Westfall, Whitten, Wieman, Wissink, Witt, Witzke, Wu, Xiao, Xie, Xin, Xu, Xue, Yang, Yepes, Yi, Yip, Yoo, Zawisza, Zbroszczyk, Zhang, Zhao, Zhong, Zhu, Zoulkarneeva

PHYSICAL REVIEW D（2012）

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Abstract

We report measurements of charmed-hadron (D-0, D*) production cross sections at midrapidity in p + p collisions at a center-of-mass energy of 200 GeV by the STAR experiment. Charmed hadrons were reconstructed via the hadronic decays D-0 -> K- pi(+), D*(+) -> D-0 pi(+) -> K-pi(+)pi(+) and their charge conjugates, covering the p(T) range of 0.6-2.0 and 2.0-6.0 GeV/c for D-0 and D*(+), respectively. From this analysis, the charm-pair production cross section at midrapidity is d sigma/dy vertical bar(c (c) over bar)(y-0) = 170+/-45(stat)(-59)(+38()sys) mu b. The extracted charm-pair cross section is compared to perturbative QCD calculations. The transverse momentum differential cross section is found to be consistent with the upper bound of a fixed-order next-to-leading logarithm calculation.

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