Charged pion form factor between $Q^2$=0.60 and 2.45 GeV$^2$. II. Determination of, and results for, the pion form factor

• Published in: Physical review. C, Nuclear physics Nuclear physics, 2008-10, Vol.78
• Main Authors: Huber, Garth, Blok, Henk, Horn, Tanja, Beise, Elizabeth, Gaskell, David, Mack, David, Tadevosyan, Vardan, Volmer, Jochen, Abbott, David, Aniol, Konrad, Anklin, Heinz, Armstrong, Christopher, Arrington, John, Assamagan, Ketevi, Avery, Steven, Baker, O., Barrett, Robert, Bochna, Christopher, Boeglin, Werner, Brash, Edward, Breuer, Herbert, Chang, C. C., Chant, Nicholas, Christy, Michael, Dunne, James, Eden, Thomas, Ent, Rolf, Fenker, Benjamin, Gibson, Edward, Gilman, Ronald, Gustafsson, Kenneth, Hinton, Wendy, Holt, Roy, Jackson, Harold, uk Jin, Seong, Jones, Mark, Keppel, Cynthia, Kim, pyunghun, Kim, Wooyoung, King, Paul, Klein, Andreas, Koltenuk, Douglas, Kovaltchouk, Vitali, Liang, Meihua, Liu, Jinghua, Lolos, George, Lung, Allison, Margaziotis, Demetrius, Markowitz, Pete, Matsumura, Akihiko, McKee, David, Meekins, David, Mitchell, Joseph, Miyoshi, Toshinobu, Mkrtchyan, Hamlet, Mueller, Robert, Niculescu, Gabriel, Niculescu, Maria-Ioana, Okayasu, Yuichi, Pentchev, Lubomir, Perdrisat, Charles, Pitz, David, Potterveld, David, Punjabi, Vina, Qin, Liming, Reimer, Paul, Reinhold, Joerg, Roche, Julie, Roos, Philip, Sarty, Adam, Shin, Ilkyoung, Smith, Gregory, Stepanyan, Stepan, Tang, Liguang, Tvaskis, Vladas, van der Meer, Rob, Vansyoc, Kelley, Van Westrum, Derek, Vidakovic, Sandra, Vulcan, William, Warren, Glen, Wood, Stephen, Xu, Chen, Yan, Chen, Zhao, Wenxia, Zheng, Xiaochao, Zihlmann, Benedikt
• Format: Article
• Language: English
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.78.045203

DOI: http://dx.doi.org/10.1103/PhysRevC.78.045203 The charged pion form factor, Fpi(Q2), is an important quantity that can be used to advance our knowledge of hadronic structure. However, the extraction of Fpi from data requires a model of the 1H(e,e'pi+)n reaction and thus is inherently model dependent. Therefore, a detailed description of the extraction of the charged pion form factor from electroproduction data obtained recently at Jefferson Lab is presented, with particular focus given to the dominant uncertainties in this procedure. Results for Fpi are presented for Q2=0.60-2.45 GeV2. Above Q2=1.5 GeV2, the Fpi values are systematically below the monopole parametrization that describes the low Q2 data used to determine the pion charge radius. The pion form factor can be calculated in a wide variety of theoretical approaches, and the experimental results are compared to a number of calculations. This comparison is helpful in understanding the role of soft versus hard c