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Affiliation(s)
- P Jimenez-Delgado
- Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, USA
| | - T J Hobbs
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
| | - J T Londergan
- Department of Physics and Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA
| | - W Melnitchouk
- Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, USA
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Jimenez-Delgado P, Hobbs TJ, Londergan JT, Melnitchouk W. New limits on intrinsic charm in the nucleon from global analysis of parton distributions. Phys Rev Lett 2015; 114:082002. [PMID: 25768757 DOI: 10.1103/physrevlett.114.082002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Indexed: 05/22/2023]
Abstract
We present a new global QCD analysis of parton distribution functions, allowing for possible intrinsic charm (IC) contributions in the nucleon inspired by light-front models. The analysis makes use of the full range of available high-energy scattering data for Q^{2}≳1 GeV^{2} and W^{2}≳3.5 GeV^{2}, including fixed-target proton and deuteron cross sections at lower energies that were excluded in previous global analyses. The expanded data set places more stringent constraints on the momentum carried by IC, with ⟨x⟩_{IC} at most 0.5% (corresponding to an IC normalization of ∼1%) at the 4σ level for Δχ^{2}=1. We also critically assess the impact of older EMC measurements of F_{2}^{c} at large x, which favor a nonzero IC, but with very large χ^{2} values.
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Affiliation(s)
- P Jimenez-Delgado
- Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, USA
| | - T J Hobbs
- Department of Physics and Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
| | - J T Londergan
- Department of Physics and Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA
| | - W Melnitchouk
- Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, USA
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Hobbs TJ, Londergan JT, Melnitchouk W. Nonperturbative charm content of the nucleon. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146606007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Meinardus HW, Dwarakanath V, Ewing J, Hirasaki GJ, Jackson RE, Jin M, Ginn JS, Londergan JT, Miller CA, Pope GA. Performance assessment of NAPL remediation in heterogeneous alluvium. J Contam Hydrol 2002; 54:173-193. [PMID: 11900327 DOI: 10.1016/s0169-7722(01)00161-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Over the last few years, more than 40 partitioning interwell tracer tests (PITTs) have been conducted at many different sites to measure nonaqueous phase liquid (NAPL) saturations in the subsurface. While the main goal of these PITTs was to estimate the NAPL volume in the subsurface, some were specifically conducted to assess the performance of remedial actions involving NAPL removal. In this paper, we present a quantitative approach to assess the performance of remedial actions to recover NAPL that can be used to assess any NAPL removal technology. It combines the use of PITTs (to estimate the NAPL volume in the swept pore volume between injection and extraction wells of a test area) with the use of several cores to determine the vertical NAPL distribution in the subsurface. We illustrate the effectiveness of such an approach by assessing the performance of a surfactant/foam flood conducted at Hill Air Force Base, UT, to remove a TCE-rich NAPL from alluvium with permeability contrasts as high as one order of magnitude. In addition, we compare the NAPL volumes determined by the PITTs with volumes estimated through geostatistical interpolation of aquifer sediment core data collected with a vertical frequency of 5-10 cm and a lateral borehole spacing of 0.15 m. We demonstrate the use of several innovations including the explicit estimation of not only the errors associated with NAPL volumes and saturations derived from PITTs but also the heterogeneity of the aquifer sediments based upon permeability estimates. Most importantly, we demonstrate the reliability of the
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Affiliation(s)
- H W Meinardus
- Duke Engineering and Services, Austin, TX 78758, USA
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Brown CL, Delshad M, Dwarakanath V, Jackson RE, Londergan JT, Meinardus HW, McKinney DC, Oolman T, Pope GA, Wade WH. Demonstration of Surfactant Flooding of an Alluvial Aquifer Contaminated with Dense Nonaqueous Phase Liquid. ACS Symposium Series 1999. [DOI: 10.1021/bk-1999-0725.ch006] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- C. L. Brown
- Department of Civil Engineering, The University of Texas at Austin, Austin, TX 78712
| | - M. Delshad
- Department of Petroleum and Geosystems Engineering, The University of Texas at Austin, Austin, TX 78712
| | - V. Dwarakanath
- Department of Petroleum and Geosystems Engineering, The University of Texas at Austin, Austin, TX 78712
| | - R. E. Jackson
- Duke Engineering and Services, Inc., 911 Research Boulevard, Austin, TX 78758
| | - J. T. Londergan
- Duke Engineering and Services, Inc., 911 Research Boulevard, Austin, TX 78758
| | - H. W. Meinardus
- Duke Engineering and Services, Inc., 911 Research Boulevard, Austin, TX 78758
| | - D. C. McKinney
- Department of Civil Engineering, The University of Texas at Austin, Austin, TX 78712
| | - T. Oolman
- Radian International LLC, P.O. Box 201088, Austin, TX 78720
| | - G. A. Pope
- Department of Petroleum and Geosystems Engineering, The University of Texas at Austin, Austin, TX 78712
| | - W. H. Wade
- Department of Chemistry, The University of Texas at Austin, Austin, TX 78712
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Boros C, Londergan JT, Thomas AW. Shadowing in neutrino deep inelastic scattering and the determination of the strange quark distribution. Int J Clin Exp Med 1998. [DOI: 10.1103/physrevd.58.114030] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Londergan JT, Pang A, Thomas AW. Probing charge-symmetry-violating quark distributions in semi-inclusive leptoproduction of hadrons. Phys Rev D Part Fields 1996; 54:3154-3161. [PMID: 10020987 DOI: 10.1103/physrevd.54.3154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Mehrem R, Londergan JT, Walker GE. Isolating physical effects in the exclusive (N,N' pi ) reaction. Phys Rev C Nucl Phys 1995; 51:2031-2043. [PMID: 9970272 DOI: 10.1103/physrevc.51.2031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Krippa BV, Londergan JT. Inclusive and exclusive production of eta mesons by pions. Phys Rev C Nucl Phys 1993; 48:2967-2972. [PMID: 9969174 DOI: 10.1103/physrevc.48.2967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Mehrem R, Londergan JT, Walker GE. Distorted-wave calculation of the (p,p' pi +) reaction. Phys Rev C Nucl Phys 1993; 48:1192-1220. [PMID: 9968952 DOI: 10.1103/physrevc.48.1192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Carini JP, Londergan JT, Mullen K, Murdock DP. Multiple bound states in sharply bent waveguides. Phys Rev B Condens Matter 1993; 48:4503-4515. [PMID: 10008929 DOI: 10.1103/physrevb.48.4503] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Jain BK, Kelkar NG, Londergan JT. Inclusive (p, Delta ++) and (p,p' pi + reactions. Phys Rev C Nucl Phys 1993; 47:1701-1715. [PMID: 9968619 DOI: 10.1103/physrevc.47.1701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Carini JP, Londergan JT, Mullen K, Murdock DP. Bound states and resonances in waveguides and quantum wires. Phys Rev B Condens Matter 1992; 46:15538-15541. [PMID: 10003684 DOI: 10.1103/physrevb.46.15538] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kumano S, Londergan JT. Isolating the flavor-symmetry-breaking component of the nucleon sea from Drell-Yan asymmetries. Phys Rev D Part Fields 1992; 46:457-460. [PMID: 10014778 DOI: 10.1103/physrevd.46.457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Jain BK, Kelkar NG, Londergan JT. Reaction-mechanism study of the exclusive (p, Delta ++) process in nuclei. Phys Rev C Nucl Phys 1991; 43:271-280. [PMID: 9967068 DOI: 10.1103/physrevc.43.271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Schreiber AW, Thomas AW, Londergan JT. QCD evolution of the spin structure functions of the neutron and proton. Phys Rev D Part Fields 1990; 42:2226-2236. [PMID: 10013076 DOI: 10.1103/physrevd.42.2226] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Jain BK, Londergan JT, Walker GE. (p,p' pi +) reaction at energies below 1 GeV. Phys Rev C Nucl Phys 1988; 37:1564-1586. [PMID: 9954611 DOI: 10.1103/physrevc.37.1564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Londergan JT, Price CE, Stephenson EJ. Stability of angular extrapolation methods for determining the deuteron asymptotic D-state to S-state ratio. Phys Rev C Nucl Phys 1987; 35:902-920. [PMID: 9953849 DOI: 10.1103/physrevc.35.902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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