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Title: Charged-pion cross sections and double-helicity asymmetries in polarized p + p collisions at √s = 200 GeV

Abstract

We present midrapidity charged-pion invariant cross sections, the ratio of the π⁻ to π⁺ cross sections and the charge-separated double-spin asymmetries in polarized p+p collisions at √s = 200 GeV. While the cross section measurements are consistent within the errors of next-to-leadingorder (NLO) perturbative quantum chromodynamics predictions (pQCD), the same calculations over estimate the ratio of the charged-pion cross sections. This discrepancy arises from the cancellation of the substantial systematic errors associated with the NLO-pQCD predictions in the ratio and highlights the constraints these data will place on flavor dependent pion fragmentation functions. Thus, the charge-separated pion asymmetries presented here sample an x range of ~0.03–0.16 and provide unique information on the sign of the gluon-helicity distribution.

Authors:
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Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1183250
Alternate Identifier(s):
OSTI ID: 1324123
Report Number(s):
BNL-107508-2015-JA
Journal ID: ISSN 1550-7998; PRVDAQ; KB0201021
Grant/Contract Number:
SC00112704; AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 91; Journal Issue: 3; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; charged-pion; sectioins; double-helicity; asymmetries; polarized; collisions; relativistic heavy ion collider; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Adare, A., Aidala, C., Ajitanand, N. N., Akiba, Y., Akimoto, R., Al-Ta’ani, H., Alexander, J., Andrews, K. R., Angerami, A., Aoki, K., Apadula, N., Appelt, E., Aramaki, Y., Armendariz, R., Aschenauer, E. C., Atomssa, E. T., Awes, T. C., Azmoun, B., Babintsev, V., Bai, M., Bannier, B., Barish, K. N., Bassalleck, B., Basye, A. T., Bathe, S., Baublis, V., Baumann, C., Bazilevsky, A., Belmont, R., Ben-Benjamin, J., Bennett, R., Blau, D. S., Bok, J. S., Boyle, K., Brooks, M. L., Broxmeyer, D., Buesching, H., Bumazhnov, V., Bunce, G., Butsyk, S., Campbell, S., Castera, P., Chen, C. -H., Chi, C. Y., Chiu, M., Choi, I. J., Choi, J. B., Choudhury, R. K., Christiansen, P., Chujo, T., Chvala, O., Cianciolo, V., Citron, Z., Cole, B. A., Conesa del Valle, Z., Connors, M., Csanád, M., Csörgő, T., Dairaku, S., Datta, A., David, G., Dayananda, M. K., Denisov, A., Deshpande, A., Desmond, E. J., Dharmawardane, K. V., Dietzsch, O., Dion, A., Donadelli, M., Drapier, O., Drees, A., Drees, K. A., Durham, J. M., Durum, A., D’Orazio, L., Efremenko, Y. V., Engelmore, T., Enokizono, A., En’yo, H., Esumi, S., Fadem, B., Fields, D. E., Finger, M., Finger, M., Fleuret, F., Fokin, S. L., Frantz, J. E., Franz, A., Frawley, A. D., Fukao, Y., Fusayasu, T., Gal, C., Garishvili, I., Giordano, F., Glenn, A., Gong, X., Gonin, M., Goto, Y., Granier de Cassagnac, R., Grau, N., Greene, S. V., Grosse Perdekamp, M., Gunji, T., Guo, L., Gustafsson, H. -Å., Haggerty, J. S., Hahn, K. I., Hamagaki, H., Hamblen, J., Han, R., Hanks, J., Harper, C., Hashimoto, K., Haslum, E., Hayano, R., He, X., Hemmick, T. K., Hester, T., Hill, J. C., Hollis, R. S., Holzmann, W., Homma, K., Hong, B., Horaguchi, T., Hori, Y., Hornback, D., Huang, S., Ichihara, T., Ichimiya, R., Iinuma, H., Ikeda, Y., Imai, K., Inaba, M., Iordanova, A., Isenhower, D., Ishihara, M., Issah, M., Ivanischev, D., Iwanaga, Y., Jacak, B. V., Jia, J., Jiang, X., John, D., Johnson, B. M., Jones, T., Joo, K. S., Jouan, D., Kamin, J., Kaneti, S., Kang, B. H., Kang, J. H., Kang, J. S., Kapustinsky, J., Karatsu, K., Kasai, M., Kawall, D., Kazantsev, A. V., Kempel, T., Khanzadeev, A., Kijima, K. M., Kim, B. I., Kim, D. J., Kim, E. -J., Kim, Y. -J., Kim, Y. K., Kinney, E., Kiss, Á., Kistenev, E., Kleinjan, D., Kline, P., Kochenda, L., Komkov, B., Konno, M., Koster, J., Kotov, D., Král, A., Kunde, G. J., Kurita, K., Kurosawa, M., Kwon, Y., Kyle, G. S., Lacey, R., Lai, Y. S., Lajoie, J. G., Lebedev, A., Lee, D. M., Lee, J., Lee, K. B., Lee, K. S., Lee, S. H., Lee, S. R., Leitch, M. J., Leite, M. A. L., Li, X., Lim, S. H., Linden Levy, L. A., Liu, H., Liu, M. X., Love, B., Lynch, D., Maguire, C. F., Makdisi, Y. I., Manion, A., Manko, V. I., Mannel, E., Mao, Y., Masui, H., McCumber, M., McGaughey, P. L., McGlinchey, D., McKinney, C., Means, N., Mendoza, M., Meredith, B., Miake, Y., Mibe, T., Mignerey, A. C., Miki, K., Milov, A., Mitchell, J. T., Miyachi, Y., Mohanty, A. K., Moon, H. J., Morino, Y., Morreale, A., Morrison, D. P., Motschwiller, S., Moukhanova, T. V., Murakami, T., Murata, J., Nagamiya, S., Nagle, J. L., Naglis, M., Nagy, M. I., Nakagawa, I., Nakamiya, Y., Nakamura, K. R., Nakamura, T., Nakano, K., Newby, J., Nguyen, M., Nihashi, M., Nouicer, R., Nyanin, A. S., Oakley, C., O’Brien, E., Ogilvie, C. A., Oka, M., Okada, K., Oskarsson, A., Ouchida, M., Ozawa, K., Pak, R., Pantuev, V., Papavassiliou, V., Park, B. H., Park, I. H., Park, S. K., Pate, S. F., Patel, L., Pei, H., Peng, J. -C., Pereira, H., Peressounko, D. Yu., Petti, R., Pinkenburg, C., Pisani, R. P., Proissl, M., Purschke, M. L., Qu, H., Rak, J., Ravinovich, I., Read, K. F., Reygers, K., Riabov, V., Riabov, Y., Richardson, E., Roach, D., Roche, G., Rolnick, S. D., Rosati, M., Rosendahl, S. S. E., Rubin, J. G., Sahlmueller, B., Saito, N., Sakaguchi, T., Samsonov, V., Sano, S., Sarsour, M., Sato, T., Savastio, M., Sawada, S., Sedgwick, K., Seidl, R., Seto, R., Sharma, D., Shein, I., Shibata, T. -A., Shigaki, K., Shim, H. H., Shimomura, M., Shoji, K., Shukla, P., Sickles, A., Silva, C. L., Silvermyr, D., Silvestre, C., Sim, K. S., Singh, B. K., Singh, C. P., Singh, V., Slunečka, M., Sodre, T., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Stankus, P. W., Stenlund, E., Stoll, S. P., Sugitate, T., Sukhanov, A., Sun, J., Sziklai, J., Takagui, E. M., Takahara, A., Taketani, A., Tanabe, R., Tanaka, Y., Taneja, S., Tanida, K., Tannenbaum, M. J., Tarafdar, S., Taranenko, A., Tennant, E., Themann, H., Thomas, D., Togawa, M., Tomášek, L., Tomášek, M., Torii, H., Towell, R. S., Tserruya, I., Tsuchimoto, Y., Utsunomiya, K., Vale, C., van Hecke, H. W., Vazquez-Zambrano, E., Veicht, A., Velkovska, J., Vértesi, R., Virius, M., Vossen, A., Vrba, V., Vznuzdaev, E., Wang, X. R., Watanabe, D., Watanabe, K., Watanabe, Y., Watanabe, Y. S., Wei, F., Wei, R., Wessels, J., White, S. N., Winter, D., Woody, C. L., Wright, R. M., Wysocki, M., Yamaguchi, Y. L., Yang, R., Yanovich, A., Ying, J., Yokkaichi, S., Yoo, J. S., You, Z., Young, G. R., Younus, I., Yushmanov, I. E., Zajc, W. A., Zelenski, A., and Zhou, S.. Charged-pion cross sections and double-helicity asymmetries in polarized p + p collisions at √s = 200 GeV. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.91.032001.
Adare, A., Aidala, C., Ajitanand, N. N., Akiba, Y., Akimoto, R., Al-Ta’ani, H., Alexander, J., Andrews, K. R., Angerami, A., Aoki, K., Apadula, N., Appelt, E., Aramaki, Y., Armendariz, R., Aschenauer, E. C., Atomssa, E. T., Awes, T. C., Azmoun, B., Babintsev, V., Bai, M., Bannier, B., Barish, K. N., Bassalleck, B., Basye, A. T., Bathe, S., Baublis, V., Baumann, C., Bazilevsky, A., Belmont, R., Ben-Benjamin, J., Bennett, R., Blau, D. S., Bok, J. S., Boyle, K., Brooks, M. L., Broxmeyer, D., Buesching, H., Bumazhnov, V., Bunce, G., Butsyk, S., Campbell, S., Castera, P., Chen, C. -H., Chi, C. Y., Chiu, M., Choi, I. J., Choi, J. B., Choudhury, R. K., Christiansen, P., Chujo, T., Chvala, O., Cianciolo, V., Citron, Z., Cole, B. A., Conesa del Valle, Z., Connors, M., Csanád, M., Csörgő, T., Dairaku, S., Datta, A., David, G., Dayananda, M. K., Denisov, A., Deshpande, A., Desmond, E. J., Dharmawardane, K. V., Dietzsch, O., Dion, A., Donadelli, M., Drapier, O., Drees, A., Drees, K. A., Durham, J. M., Durum, A., D’Orazio, L., Efremenko, Y. V., Engelmore, T., Enokizono, A., En’yo, H., Esumi, S., Fadem, B., Fields, D. E., Finger, M., Finger, M., Fleuret, F., Fokin, S. L., Frantz, J. E., Franz, A., Frawley, A. D., Fukao, Y., Fusayasu, T., Gal, C., Garishvili, I., Giordano, F., Glenn, A., Gong, X., Gonin, M., Goto, Y., Granier de Cassagnac, R., Grau, N., Greene, S. V., Grosse Perdekamp, M., Gunji, T., Guo, L., Gustafsson, H. -Å., Haggerty, J. S., Hahn, K. I., Hamagaki, H., Hamblen, J., Han, R., Hanks, J., Harper, C., Hashimoto, K., Haslum, E., Hayano, R., He, X., Hemmick, T. K., Hester, T., Hill, J. C., Hollis, R. S., Holzmann, W., Homma, K., Hong, B., Horaguchi, T., Hori, Y., Hornback, D., Huang, S., Ichihara, T., Ichimiya, R., Iinuma, H., Ikeda, Y., Imai, K., Inaba, M., Iordanova, A., Isenhower, D., Ishihara, M., Issah, M., Ivanischev, D., Iwanaga, Y., Jacak, B. V., Jia, J., Jiang, X., John, D., Johnson, B. M., Jones, T., Joo, K. S., Jouan, D., Kamin, J., Kaneti, S., Kang, B. H., Kang, J. H., Kang, J. S., Kapustinsky, J., Karatsu, K., Kasai, M., Kawall, D., Kazantsev, A. V., Kempel, T., Khanzadeev, A., Kijima, K. M., Kim, B. I., Kim, D. J., Kim, E. -J., Kim, Y. -J., Kim, Y. K., Kinney, E., Kiss, Á., Kistenev, E., Kleinjan, D., Kline, P., Kochenda, L., Komkov, B., Konno, M., Koster, J., Kotov, D., Král, A., Kunde, G. J., Kurita, K., Kurosawa, M., Kwon, Y., Kyle, G. S., Lacey, R., Lai, Y. S., Lajoie, J. G., Lebedev, A., Lee, D. M., Lee, J., Lee, K. B., Lee, K. S., Lee, S. H., Lee, S. R., Leitch, M. J., Leite, M. A. L., Li, X., Lim, S. H., Linden Levy, L. A., Liu, H., Liu, M. X., Love, B., Lynch, D., Maguire, C. F., Makdisi, Y. I., Manion, A., Manko, V. I., Mannel, E., Mao, Y., Masui, H., McCumber, M., McGaughey, P. L., McGlinchey, D., McKinney, C., Means, N., Mendoza, M., Meredith, B., Miake, Y., Mibe, T., Mignerey, A. C., Miki, K., Milov, A., Mitchell, J. T., Miyachi, Y., Mohanty, A. K., Moon, H. J., Morino, Y., Morreale, A., Morrison, D. P., Motschwiller, S., Moukhanova, T. V., Murakami, T., Murata, J., Nagamiya, S., Nagle, J. L., Naglis, M., Nagy, M. I., Nakagawa, I., Nakamiya, Y., Nakamura, K. R., Nakamura, T., Nakano, K., Newby, J., Nguyen, M., Nihashi, M., Nouicer, R., Nyanin, A. S., Oakley, C., O’Brien, E., Ogilvie, C. A., Oka, M., Okada, K., Oskarsson, A., Ouchida, M., Ozawa, K., Pak, R., Pantuev, V., Papavassiliou, V., Park, B. H., Park, I. H., Park, S. K., Pate, S. F., Patel, L., Pei, H., Peng, J. -C., Pereira, H., Peressounko, D. Yu., Petti, R., Pinkenburg, C., Pisani, R. P., Proissl, M., Purschke, M. L., Qu, H., Rak, J., Ravinovich, I., Read, K. F., Reygers, K., Riabov, V., Riabov, Y., Richardson, E., Roach, D., Roche, G., Rolnick, S. D., Rosati, M., Rosendahl, S. S. E., Rubin, J. G., Sahlmueller, B., Saito, N., Sakaguchi, T., Samsonov, V., Sano, S., Sarsour, M., Sato, T., Savastio, M., Sawada, S., Sedgwick, K., Seidl, R., Seto, R., Sharma, D., Shein, I., Shibata, T. -A., Shigaki, K., Shim, H. H., Shimomura, M., Shoji, K., Shukla, P., Sickles, A., Silva, C. L., Silvermyr, D., Silvestre, C., Sim, K. S., Singh, B. K., Singh, C. P., Singh, V., Slunečka, M., Sodre, T., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Stankus, P. W., Stenlund, E., Stoll, S. P., Sugitate, T., Sukhanov, A., Sun, J., Sziklai, J., Takagui, E. M., Takahara, A., Taketani, A., Tanabe, R., Tanaka, Y., Taneja, S., Tanida, K., Tannenbaum, M. J., Tarafdar, S., Taranenko, A., Tennant, E., Themann, H., Thomas, D., Togawa, M., Tomášek, L., Tomášek, M., Torii, H., Towell, R. S., Tserruya, I., Tsuchimoto, Y., Utsunomiya, K., Vale, C., van Hecke, H. W., Vazquez-Zambrano, E., Veicht, A., Velkovska, J., Vértesi, R., Virius, M., Vossen, A., Vrba, V., Vznuzdaev, E., Wang, X. R., Watanabe, D., Watanabe, K., Watanabe, Y., Watanabe, Y. S., Wei, F., Wei, R., Wessels, J., White, S. N., Winter, D., Woody, C. L., Wright, R. M., Wysocki, M., Yamaguchi, Y. L., Yang, R., Yanovich, A., Ying, J., Yokkaichi, S., Yoo, J. S., You, Z., Young, G. R., Younus, I., Yushmanov, I. E., Zajc, W. A., Zelenski, A., & Zhou, S.. Charged-pion cross sections and double-helicity asymmetries in polarized p + p collisions at √s = 200 GeV. United States. doi:10.1103/PhysRevD.91.032001.
Adare, A., Aidala, C., Ajitanand, N. N., Akiba, Y., Akimoto, R., Al-Ta’ani, H., Alexander, J., Andrews, K. R., Angerami, A., Aoki, K., Apadula, N., Appelt, E., Aramaki, Y., Armendariz, R., Aschenauer, E. C., Atomssa, E. T., Awes, T. C., Azmoun, B., Babintsev, V., Bai, M., Bannier, B., Barish, K. N., Bassalleck, B., Basye, A. T., Bathe, S., Baublis, V., Baumann, C., Bazilevsky, A., Belmont, R., Ben-Benjamin, J., Bennett, R., Blau, D. S., Bok, J. S., Boyle, K., Brooks, M. L., Broxmeyer, D., Buesching, H., Bumazhnov, V., Bunce, G., Butsyk, S., Campbell, S., Castera, P., Chen, C. -H., Chi, C. Y., Chiu, M., Choi, I. J., Choi, J. B., Choudhury, R. K., Christiansen, P., Chujo, T., Chvala, O., Cianciolo, V., Citron, Z., Cole, B. A., Conesa del Valle, Z., Connors, M., Csanád, M., Csörgő, T., Dairaku, S., Datta, A., David, G., Dayananda, M. K., Denisov, A., Deshpande, A., Desmond, E. J., Dharmawardane, K. V., Dietzsch, O., Dion, A., Donadelli, M., Drapier, O., Drees, A., Drees, K. A., Durham, J. M., Durum, A., D’Orazio, L., Efremenko, Y. V., Engelmore, T., Enokizono, A., En’yo, H., Esumi, S., Fadem, B., Fields, D. E., Finger, M., Finger, M., Fleuret, F., Fokin, S. L., Frantz, J. E., Franz, A., Frawley, A. D., Fukao, Y., Fusayasu, T., Gal, C., Garishvili, I., Giordano, F., Glenn, A., Gong, X., Gonin, M., Goto, Y., Granier de Cassagnac, R., Grau, N., Greene, S. V., Grosse Perdekamp, M., Gunji, T., Guo, L., Gustafsson, H. -Å., Haggerty, J. S., Hahn, K. I., Hamagaki, H., Hamblen, J., Han, R., Hanks, J., Harper, C., Hashimoto, K., Haslum, E., Hayano, R., He, X., Hemmick, T. K., Hester, T., Hill, J. C., Hollis, R. S., Holzmann, W., Homma, K., Hong, B., Horaguchi, T., Hori, Y., Hornback, D., Huang, S., Ichihara, T., Ichimiya, R., Iinuma, H., Ikeda, Y., Imai, K., Inaba, M., Iordanova, A., Isenhower, D., Ishihara, M., Issah, M., Ivanischev, D., Iwanaga, Y., Jacak, B. V., Jia, J., Jiang, X., John, D., Johnson, B. M., Jones, T., Joo, K. S., Jouan, D., Kamin, J., Kaneti, S., Kang, B. H., Kang, J. H., Kang, J. S., Kapustinsky, J., Karatsu, K., Kasai, M., Kawall, D., Kazantsev, A. V., Kempel, T., Khanzadeev, A., Kijima, K. M., Kim, B. I., Kim, D. J., Kim, E. -J., Kim, Y. -J., Kim, Y. K., Kinney, E., Kiss, Á., Kistenev, E., Kleinjan, D., Kline, P., Kochenda, L., Komkov, B., Konno, M., Koster, J., Kotov, D., Král, A., Kunde, G. J., Kurita, K., Kurosawa, M., Kwon, Y., Kyle, G. S., Lacey, R., Lai, Y. S., Lajoie, J. G., Lebedev, A., Lee, D. M., Lee, J., Lee, K. B., Lee, K. S., Lee, S. H., Lee, S. R., Leitch, M. J., Leite, M. A. L., Li, X., Lim, S. H., Linden Levy, L. A., Liu, H., Liu, M. X., Love, B., Lynch, D., Maguire, C. F., Makdisi, Y. I., Manion, A., Manko, V. I., Mannel, E., Mao, Y., Masui, H., McCumber, M., McGaughey, P. L., McGlinchey, D., McKinney, C., Means, N., Mendoza, M., Meredith, B., Miake, Y., Mibe, T., Mignerey, A. C., Miki, K., Milov, A., Mitchell, J. T., Miyachi, Y., Mohanty, A. K., Moon, H. J., Morino, Y., Morreale, A., Morrison, D. P., Motschwiller, S., Moukhanova, T. V., Murakami, T., Murata, J., Nagamiya, S., Nagle, J. L., Naglis, M., Nagy, M. I., Nakagawa, I., Nakamiya, Y., Nakamura, K. R., Nakamura, T., Nakano, K., Newby, J., Nguyen, M., Nihashi, M., Nouicer, R., Nyanin, A. S., Oakley, C., O’Brien, E., Ogilvie, C. A., Oka, M., Okada, K., Oskarsson, A., Ouchida, M., Ozawa, K., Pak, R., Pantuev, V., Papavassiliou, V., Park, B. H., Park, I. H., Park, S. K., Pate, S. F., Patel, L., Pei, H., Peng, J. -C., Pereira, H., Peressounko, D. Yu., Petti, R., Pinkenburg, C., Pisani, R. P., Proissl, M., Purschke, M. L., Qu, H., Rak, J., Ravinovich, I., Read, K. F., Reygers, K., Riabov, V., Riabov, Y., Richardson, E., Roach, D., Roche, G., Rolnick, S. D., Rosati, M., Rosendahl, S. S. E., Rubin, J. G., Sahlmueller, B., Saito, N., Sakaguchi, T., Samsonov, V., Sano, S., Sarsour, M., Sato, T., Savastio, M., Sawada, S., Sedgwick, K., Seidl, R., Seto, R., Sharma, D., Shein, I., Shibata, T. -A., Shigaki, K., Shim, H. H., Shimomura, M., Shoji, K., Shukla, P., Sickles, A., Silva, C. L., Silvermyr, D., Silvestre, C., Sim, K. S., Singh, B. K., Singh, C. P., Singh, V., Slunečka, M., Sodre, T., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Stankus, P. W., Stenlund, E., Stoll, S. P., Sugitate, T., Sukhanov, A., Sun, J., Sziklai, J., Takagui, E. M., Takahara, A., Taketani, A., Tanabe, R., Tanaka, Y., Taneja, S., Tanida, K., Tannenbaum, M. J., Tarafdar, S., Taranenko, A., Tennant, E., Themann, H., Thomas, D., Togawa, M., Tomášek, L., Tomášek, M., Torii, H., Towell, R. S., Tserruya, I., Tsuchimoto, Y., Utsunomiya, K., Vale, C., van Hecke, H. W., Vazquez-Zambrano, E., Veicht, A., Velkovska, J., Vértesi, R., Virius, M., Vossen, A., Vrba, V., Vznuzdaev, E., Wang, X. R., Watanabe, D., Watanabe, K., Watanabe, Y., Watanabe, Y. S., Wei, F., Wei, R., Wessels, J., White, S. N., Winter, D., Woody, C. L., Wright, R. M., Wysocki, M., Yamaguchi, Y. L., Yang, R., Yanovich, A., Ying, J., Yokkaichi, S., Yoo, J. S., You, Z., Young, G. R., Younus, I., Yushmanov, I. E., Zajc, W. A., Zelenski, A., and Zhou, S.. Mon . "Charged-pion cross sections and double-helicity asymmetries in polarized p + p collisions at √s = 200 GeV". United States. doi:10.1103/PhysRevD.91.032001. https://www.osti.gov/servlets/purl/1183250.
@article{osti_1183250,
title = {Charged-pion cross sections and double-helicity asymmetries in polarized p + p collisions at √s = 200 GeV},
author = {Adare, A. and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Akimoto, R. and Al-Ta’ani, H. and Alexander, J. and Andrews, K. R. and Angerami, A. and Aoki, K. and Apadula, N. and Appelt, E. and Aramaki, Y. and Armendariz, R. and Aschenauer, E. C. and Atomssa, E. T. and Awes, T. C. and Azmoun, B. and Babintsev, V. and Bai, M. and Bannier, B. and Barish, K. N. and Bassalleck, B. and Basye, A. T. and Bathe, S. and Baublis, V. and Baumann, C. and Bazilevsky, A. and Belmont, R. and Ben-Benjamin, J. and Bennett, R. and Blau, D. S. and Bok, J. S. and Boyle, K. and Brooks, M. L. and Broxmeyer, D. and Buesching, H. and Bumazhnov, V. and Bunce, G. and Butsyk, S. and Campbell, S. and Castera, P. and Chen, C. -H. and Chi, C. Y. and Chiu, M. and Choi, I. J. and Choi, J. B. and Choudhury, R. K. and Christiansen, P. and Chujo, T. and Chvala, O. and Cianciolo, V. and Citron, Z. and Cole, B. A. and Conesa del Valle, Z. and Connors, M. and Csanád, M. and Csörgő, T. and Dairaku, S. and Datta, A. and David, G. and Dayananda, M. K. and Denisov, A. and Deshpande, A. and Desmond, E. J. and Dharmawardane, K. V. and Dietzsch, O. and Dion, A. and Donadelli, M. and Drapier, O. and Drees, A. and Drees, K. A. and Durham, J. M. and Durum, A. and D’Orazio, L. and Efremenko, Y. V. and Engelmore, T. and Enokizono, A. and En’yo, H. and Esumi, S. and Fadem, B. and Fields, D. E. and Finger, M. and Finger, M. and Fleuret, F. and Fokin, S. L. and Frantz, J. E. and Franz, A. and Frawley, A. D. and Fukao, Y. and Fusayasu, T. and Gal, C. and Garishvili, I. and Giordano, F. and Glenn, A. and Gong, X. and Gonin, M. and Goto, Y. and Granier de Cassagnac, R. and Grau, N. and Greene, S. V. and Grosse Perdekamp, M. and Gunji, T. and Guo, L. and Gustafsson, H. -Å. and Haggerty, J. S. and Hahn, K. I. and Hamagaki, H. and Hamblen, J. and Han, R. and Hanks, J. and Harper, C. and Hashimoto, K. and Haslum, E. and Hayano, R. and He, X. and Hemmick, T. K. and Hester, T. and Hill, J. C. and Hollis, R. S. and Holzmann, W. and Homma, K. and Hong, B. and Horaguchi, T. and Hori, Y. and Hornback, D. and Huang, S. and Ichihara, T. and Ichimiya, R. and Iinuma, H. and Ikeda, Y. and Imai, K. and Inaba, M. and Iordanova, A. and Isenhower, D. and Ishihara, M. and Issah, M. and Ivanischev, D. and Iwanaga, Y. and Jacak, B. V. and Jia, J. and Jiang, X. and John, D. and Johnson, B. M. and Jones, T. and Joo, K. S. and Jouan, D. and Kamin, J. and Kaneti, S. and Kang, B. H. and Kang, J. H. and Kang, J. S. and Kapustinsky, J. and Karatsu, K. and Kasai, M. and Kawall, D. and Kazantsev, A. V. and Kempel, T. and Khanzadeev, A. and Kijima, K. M. and Kim, B. I. and Kim, D. J. and Kim, E. -J. and Kim, Y. -J. and Kim, Y. K. and Kinney, E. and Kiss, Á. and Kistenev, E. and Kleinjan, D. and Kline, P. and Kochenda, L. and Komkov, B. and Konno, M. and Koster, J. and Kotov, D. and Král, A. and Kunde, G. J. and Kurita, K. and Kurosawa, M. and Kwon, Y. and Kyle, G. S. and Lacey, R. and Lai, Y. S. and Lajoie, J. G. and Lebedev, A. and Lee, D. M. and Lee, J. and Lee, K. B. and Lee, K. S. and Lee, S. H. and Lee, S. R. and Leitch, M. J. and Leite, M. A. L. and Li, X. and Lim, S. H. and Linden Levy, L. A. and Liu, H. and Liu, M. X. and Love, B. and Lynch, D. and Maguire, C. F. and Makdisi, Y. I. and Manion, A. and Manko, V. I. and Mannel, E. and Mao, Y. and Masui, H. and McCumber, M. and McGaughey, P. L. and McGlinchey, D. and McKinney, C. and Means, N. and Mendoza, M. and Meredith, B. and Miake, Y. and Mibe, T. and Mignerey, A. C. and Miki, K. and Milov, A. and Mitchell, J. T. and Miyachi, Y. and Mohanty, A. K. and Moon, H. J. and Morino, Y. and Morreale, A. and Morrison, D. P. and Motschwiller, S. and Moukhanova, T. V. and Murakami, T. and Murata, J. and Nagamiya, S. and Nagle, J. L. and Naglis, M. and Nagy, M. I. and Nakagawa, I. and Nakamiya, Y. and Nakamura, K. R. and Nakamura, T. and Nakano, K. and Newby, J. and Nguyen, M. and Nihashi, M. and Nouicer, R. and Nyanin, A. S. and Oakley, C. and O’Brien, E. and Ogilvie, C. A. and Oka, M. and Okada, K. and Oskarsson, A. and Ouchida, M. and Ozawa, K. and Pak, R. and Pantuev, V. and Papavassiliou, V. and Park, B. H. and Park, I. H. and Park, S. K. and Pate, S. F. and Patel, L. and Pei, H. and Peng, J. -C. and Pereira, H. and Peressounko, D. Yu. and Petti, R. and Pinkenburg, C. and Pisani, R. P. and Proissl, M. and Purschke, M. L. and Qu, H. and Rak, J. and Ravinovich, I. and Read, K. F. and Reygers, K. and Riabov, V. and Riabov, Y. and Richardson, E. and Roach, D. and Roche, G. and Rolnick, S. D. and Rosati, M. and Rosendahl, S. S. E. and Rubin, J. G. and Sahlmueller, B. and Saito, N. and Sakaguchi, T. and Samsonov, V. and Sano, S. and Sarsour, M. and Sato, T. and Savastio, M. and Sawada, S. and Sedgwick, K. and Seidl, R. and Seto, R. and Sharma, D. and Shein, I. and Shibata, T. -A. and Shigaki, K. and Shim, H. H. and Shimomura, M. and Shoji, K. and Shukla, P. and Sickles, A. and Silva, C. L. and Silvermyr, D. and Silvestre, C. and Sim, K. S. and Singh, B. K. and Singh, C. P. and Singh, V. and Slunečka, M. and Sodre, T. and Soltz, R. A. and Sondheim, W. E. and Sorensen, S. P. and Sourikova, I. V. and Stankus, P. W. and Stenlund, E. and Stoll, S. P. and Sugitate, T. and Sukhanov, A. and Sun, J. and Sziklai, J. and Takagui, E. M. and Takahara, A. and Taketani, A. and Tanabe, R. and Tanaka, Y. and Taneja, S. and Tanida, K. and Tannenbaum, M. J. and Tarafdar, S. and Taranenko, A. and Tennant, E. and Themann, H. and Thomas, D. and Togawa, M. and Tomášek, L. and Tomášek, M. and Torii, H. and Towell, R. S. and Tserruya, I. and Tsuchimoto, Y. and Utsunomiya, K. and Vale, C. and van Hecke, H. W. and Vazquez-Zambrano, E. and Veicht, A. and Velkovska, J. and Vértesi, R. and Virius, M. and Vossen, A. and Vrba, V. and Vznuzdaev, E. and Wang, X. R. and Watanabe, D. and Watanabe, K. and Watanabe, Y. and Watanabe, Y. S. and Wei, F. and Wei, R. and Wessels, J. and White, S. N. and Winter, D. and Woody, C. L. and Wright, R. M. and Wysocki, M. and Yamaguchi, Y. L. and Yang, R. and Yanovich, A. and Ying, J. and Yokkaichi, S. and Yoo, J. S. and You, Z. and Young, G. R. and Younus, I. and Yushmanov, I. E. and Zajc, W. A. and Zelenski, A. and Zhou, S.},
abstractNote = {We present midrapidity charged-pion invariant cross sections, the ratio of the π⁻ to π⁺ cross sections and the charge-separated double-spin asymmetries in polarized p+p collisions at √s = 200 GeV. While the cross section measurements are consistent within the errors of next-to-leadingorder (NLO) perturbative quantum chromodynamics predictions (pQCD), the same calculations over estimate the ratio of the charged-pion cross sections. This discrepancy arises from the cancellation of the substantial systematic errors associated with the NLO-pQCD predictions in the ratio and highlights the constraints these data will place on flavor dependent pion fragmentation functions. Thus, the charge-separated pion asymmetries presented here sample an x range of ~0.03–0.16 and provide unique information on the sign of the gluon-helicity distribution.},
doi = {10.1103/PhysRevD.91.032001},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 3,
volume = 91,
place = {United States},
year = {Mon Feb 02 00:00:00 EST 2015},
month = {Mon Feb 02 00:00:00 EST 2015}
}

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