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59 results on '"Filippone, BW"'

1. Discovering the New Standard Model: Fundamental Symmetries and Neutrinos

Author

Cianciolo, V, Balantekin, AB, Bernstein, A, Cirigliano, V, Cooper, MD, Dean, DJ, Elliott, SR, Filippone, BW, Freedman, SJ, Greene, GL, Heeger, KM, Hertzog, DW, Holstein, BR, Huffman, P, Ito, T, Kumar, K, Lu, Z-T, Nico, JS, Gann, GD Orebi, Paschke, K, Piepke, A, Plaster, B, Pocanic, D, Poon, AWP, Radford, DC, Ramsey-Musolf, MJ, Robertson, RGH, Savard, G, Scholberg, K, Semertzidis, Y, and Wilkerson, JF

Subjects
nucl-ex, hep-ex, hep-ph, nucl-th
Abstract

This White Paper describes recent progress and future opportunities in thearea of fundamental symmetries and neutrinos.

Published
2012

2. First Measurement of the Neutron beta Asymmetry with Ultracold Neutrons

Author

Pattie, RW, Anaya, J, Back, HO, Boissevain, JG, Bowles, TJ, Broussard, LJ, Carr, R, Clark, DJ, Currie, S, Du, S, Filippone, BW, Geltenbort, P, Garcia, A, Hawari, A, Hickerson, KP, Hill, R, Hino, M, Hoedl, SA, Hogan, GE, Holley, AT, Ito, TM, Kawai, T, Kirch, K, Kitagaki, S, Lamoreaux, SK, Liu, CY, Liu, J, Makela, M, Mammei, RR, Martin, JW, Melconian, D, Meier, N, Mendenhall, MP, Morris, CL, Mortensen, R, Pichlmaier, A, Pitt, ML, Plaster, B, Ramsey, JC, Rios, R, Sabourov, K, Sallaska, AL, Saunders, A, Schmid, R, Seestrom, S, Servicky, C, Sjue, SKL, Smith, D, Sondheim, WE, Tatar, E, Teasdale, W, Terai, C, Tipton, B, Utsuro, M, Vogelaar, RB, Wehring, BW, Xu, YP, Young, AR, Yuan, J, Pattie, RW, Anaya, J, Back, HO, Boissevain, JG, Bowles, TJ, Broussard, LJ, Carr, R, Clark, DJ, Currie, S, Du, S, Filippone, BW, Geltenbort, P, Garcia, A, Hawari, A, Hickerson, KP, Hill, R, Hino, M, Hoedl, SA, Hogan, GE, Holley, AT, Ito, TM, Kawai, T, Kirch, K, Kitagaki, S, Lamoreaux, SK, Liu, CY, Liu, J, Makela, M, Mammei, RR, Martin, JW, Melconian, D, Meier, N, Mendenhall, MP, Morris, CL, Mortensen, R, Pichlmaier, A, Pitt, ML, Plaster, B, Ramsey, JC, Rios, R, Sabourov, K, Sallaska, AL, Saunders, A, Schmid, R, Seestrom, S, Servicky, C, Sjue, SKL, Smith, D, Sondheim, WE, Tatar, E, Teasdale, W, Terai, C, Tipton, B, Utsuro, M, Vogelaar, RB, Wehring, BW, Xu, YP, Young, AR, and Yuan, J

Abstract

We report the first measurement of an angular correlation parameter in neutron beta decay using polarized ultracold neutrons (UCN). We utilize UCN with energies below about 200 neV, which we guide and store for ~30 s in a Cu decay volume. The interaction of the neutron magnetic dipole moment with a static 7 T field external to the decay volume provides a 420 neV potential energy barrier to the spin state parallel to the field, polarizing the UCN before they pass through an adiabatic fast passage spin flipper and enter a decay volume, situated within a 1 T field in a 2×2pi solenoidal spectrometer. We determine a value for the beta-asymmetry parameter A0=-0.1138±0.0046±0.0021.

Published
2009

3. First Measurement of the Neutron beta Asymmetry with Ultracold Neutrons

Author

70314292, Pattie, RW, Anaya, J, Back, HO, Boissevain, JG, Bowles, TJ, Broussard, LJ, Carr, R, Clark, DJ, Currie, S, Du, S, Filippone, BW, Geltenbort, P, Garcia, A, Hawari, A, Hickerson, KP, Hill, R, Hino, M, Hoedl, SA, Hogan, GE, Holley, AT, Ito, TM, Kawai, T, Kirch, K, Kitagaki, S, Lamoreaux, SK, Liu, CY, Liu, J, Makela, M, Mammei, RR, Martin, JW, Melconian, D, Meier, N, Mendenhall, MP, Morris, CL, Mortensen, R, Pichlmaier, A, Pitt, ML, Plaster, B, Ramsey, JC, Rios, R, Sabourov, K, Sallaska, AL, Saunders, A, Schmid, R, Seestrom, S, Servicky, C, Sjue, SKL, Smith, D, Sondheim, WE, Tatar, E, Teasdale, W, Terai, C, Tipton, B, Utsuro, M, Vogelaar, RB, Wehring, BW, Xu, YP, Young, AR, Yuan, J, 70314292, Pattie, RW, Anaya, J, Back, HO, Boissevain, JG, Bowles, TJ, Broussard, LJ, Carr, R, Clark, DJ, Currie, S, Du, S, Filippone, BW, Geltenbort, P, Garcia, A, Hawari, A, Hickerson, KP, Hill, R, Hino, M, Hoedl, SA, Hogan, GE, Holley, AT, Ito, TM, Kawai, T, Kirch, K, Kitagaki, S, Lamoreaux, SK, Liu, CY, Liu, J, Makela, M, Mammei, RR, Martin, JW, Melconian, D, Meier, N, Mendenhall, MP, Morris, CL, Mortensen, R, Pichlmaier, A, Pitt, ML, Plaster, B, Ramsey, JC, Rios, R, Sabourov, K, Sallaska, AL, Saunders, A, Schmid, R, Seestrom, S, Servicky, C, Sjue, SKL, Smith, D, Sondheim, WE, Tatar, E, Teasdale, W, Terai, C, Tipton, B, Utsuro, M, Vogelaar, RB, Wehring, BW, Xu, YP, Young, AR, and Yuan, J

Abstract

We report the first measurement of an angular correlation parameter in neutron beta decay using polarized ultracold neutrons (UCN). We utilize UCN with energies below about 200 neV, which we guide and store for ~30 s in a Cu decay volume. The interaction of the neutron magnetic dipole moment with a static 7 T field external to the decay volume provides a 420 neV potential energy barrier to the spin state parallel to the field, polarizing the UCN before they pass through an adiabatic fast passage spin flipper and enter a decay volume, situated within a 1 T field in a 2×2pi solenoidal spectrometer. We determine a value for the beta-asymmetry parameter A0=-0.1138±0.0046±0.0021.

Published
2009

4. Demonstration of a solid deuterium source of ultra-cold neutrons

Author

Saunders, A, Anaya, JM, Bowles, TJ, Filippone, BW, Geltenbort, P, Hill, RE, Hino, M, Hoedl, S, Hogan, GE, Ito, TM, Jones, KW, Kawai, T, Kirch, K, Lamoreaux, SK, Liu, CY, Makela, M, Marek, LJ, Martin, JW, Morris, CL, Mortensen, RN, Pichlmaier, A, Seestrom, SJ, Serebrov, A, Smith, D, Teasdale, W, Tipton, B, Vogelaar, RB, Young, AR, Yuan, J, Saunders, A, Anaya, JM, Bowles, TJ, Filippone, BW, Geltenbort, P, Hill, RE, Hino, M, Hoedl, S, Hogan, GE, Ito, TM, Jones, KW, Kawai, T, Kirch, K, Lamoreaux, SK, Liu, CY, Makela, M, Marek, LJ, Martin, JW, Morris, CL, Mortensen, RN, Pichlmaier, A, Seestrom, SJ, Serebrov, A, Smith, D, Teasdale, W, Tipton, B, Vogelaar, RB, Young, AR, and Yuan, J

Published
2004

5. Demonstration of a solid deuterium source of ultra-cold neutrons

Author

70314292, Saunders, A, Anaya, JM, Bowles, TJ, Filippone, BW, Geltenbort, P, Hill, RE, Hino, M, Hoedl, S, Hogan, GE, Ito, TM, Jones, KW, Kawai, T, Kirch, K, Lamoreaux, SK, Liu, CY, Makela, M, Marek, LJ, Martin, JW, Morris, CL, Mortensen, RN, Pichlmaier, A, Seestrom, SJ, Serebrov, A, Smith, D, Teasdale, W, Tipton, B, Vogelaar, RB, Young, AR, Yuan, J, 70314292, Saunders, A, Anaya, JM, Bowles, TJ, Filippone, BW, Geltenbort, P, Hill, RE, Hino, M, Hoedl, S, Hogan, GE, Ito, TM, Jones, KW, Kawai, T, Kirch, K, Lamoreaux, SK, Liu, CY, Makela, M, Marek, LJ, Martin, JW, Morris, CL, Mortensen, RN, Pichlmaier, A, Seestrom, SJ, Serebrov, A, Smith, D, Teasdale, W, Tipton, B, Vogelaar, RB, Young, AR, and Yuan, J

Published
2004

6. Measurements of ultracold-neutron lifetimes in solid deuterium

Author

70314292, Morris, CL, Anaya, JM, Bowles, TJ, Filippone, BW, Geltenbort, P, Hill, RE, Hino, M, Hoedl, S, Hogan, GE, Ito, TM, Kawai, T, Kirch, K, Lamoreaux, SK, Liu, CY, Makela, M, Marek, LJ, Martin, JW, Mortensen, RN, Pichlmaier, A, Saunders, A, Seestrom, SJ, Smith, D, Teasdale, W, Tipton, B, Utsuro, M, Young, AR, Yuan, J, 70314292, Morris, CL, Anaya, JM, Bowles, TJ, Filippone, BW, Geltenbort, P, Hill, RE, Hino, M, Hoedl, S, Hogan, GE, Ito, TM, Kawai, T, Kirch, K, Lamoreaux, SK, Liu, CY, Makela, M, Marek, LJ, Martin, JW, Mortensen, RN, Pichlmaier, A, Saunders, A, Seestrom, SJ, Smith, D, Teasdale, W, Tipton, B, Utsuro, M, Young, AR, and Yuan, J

Published
2002

7. Electric charging effects on insulating surfaces in cryogenic liquids.

Author

Korsch W, Broering M, Timsina A, Leung KKH, Abney J, Budker D, Filippone BW, He J, Kandu S, McCrea M, Roy M, Swank C, and Yao W

Abstract

This paper presents a new technique to study the adsorption and desorption of ions and electrons on insulating surfaces in the presence of strong electric fields in cryoliquids. The experimental design consists of a compact cryostat coupled with a sensitive electro-optical Kerr device to monitor the stability of the electric fields. The behavior of nitrogen and helium ions on a poly(methyl methacrylate) (PMMA) surface was compared to a PMMA surface coated with a mixture of deuterated polystyrene and deuterated polybutadiene. Ion accumulation and removal on these surfaces were unambiguously observed. Within the precision of the data, both surfaces behave similarly for the physisorbed ions. The setup was also used to measure the (quasi-)static dielectric constant of PMMA at T ≈ 70 K. The impact of the ion adsorption on the search for a neutron permanent electric dipole moment in a cryogenic environment, such as the nEDM@SNS experiment, is discussed., (© 2024 Author(s). Published under an exclusive license by AIP Publishing.)

Published
2024
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8. Improved Neutron Lifetime Measurement with UCNτ.

Author

Gonzalez FM, Fries EM, Cude-Woods C, Bailey T, Blatnik M, Broussard LJ, Callahan NB, Choi JH, Clayton SM, Currie SA, Dawid M, Dees EB, Filippone BW, Fox W, Geltenbort P, George E, Hayen L, Hickerson KP, Hoffbauer MA, Hoffman K, Holley AT, Ito TM, Komives A, Liu CY, Makela M, Morris CL, Musedinovic R, O'Shaughnessy C, Pattie RW, Ramsey J, Salvat DJ, Saunders A, Sharapov EI, Slutsky S, Su V, Sun X, Swank C, Tang Z, Uhrich W, Vanderwerp J, Walstrom P, Wang Z, Wei W, and Young AR

Abstract

We report an improved measurement of the free neutron lifetime τ_{n} using the UCNτ apparatus at the Los Alamos Neutron Science Center. We count a total of approximately 38×10^{6} surviving ultracold neutrons (UCNs) after storing in UCNτ's magnetogravitational trap over two data acquisition campaigns in 2017 and 2018. We extract τ_{n} from three blinded, independent analyses by both pairing long and short storage time runs to find a set of replicate τ_{n} measurements and by performing a global likelihood fit to all data while self-consistently incorporating the β-decay lifetime. Both techniques achieve consistent results and find a value τ_{n}=877.75±0.28_{stat}+0.22/-0.16_{syst}  s. With this sensitivity, neutron lifetime experiments now directly address the impact of recent refinements in our understanding of the standard model for neutron decay.

Published
2021
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9. An apparatus for studying electrical breakdown in liquid helium at 0.4 K and testing electrode materials for the neutron electric dipole moment experiment at the Spallation Neutron Source.

Author

Ito TM, Ramsey JC, Yao W, Beck DH, Cianciolo V, Clayton SM, Crawford C, Currie SA, Filippone BW, Griffith WC, Makela M, Schmid R, Seidel GM, Tang Z, Wagner D, Wei W, and Williamson SE

Abstract

We have constructed an apparatus to study DC electrical breakdown in liquid helium at temperatures as low as 0.4 K and at pressures between the saturated vapor pressure and ∼600 Torr. The apparatus can house a set of electrodes that are 12 cm in diameter with a gap of 1-2 cm between them, and a potential up to ±50 kV can be applied to each electrode. Initial results demonstrated that it is possible to apply fields exceeding 100 kV/cm in a 1 cm gap between two electropolished stainless steel electrodes 12 cm in diameter for a wide range of pressures at 0.4 K. We also measured the current between two electrodes. Our initial results, I < 1 pA at 45 kV, correspond to a lower bound on the effective volume resistivity of liquid helium of ρV > 5 × 10(18) Ω cm. This lower bound is 5 times larger than the bound previously measured. We report the design, construction, and operational experience of the apparatus, as well as initial results.

Published
2016
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10. New measurements of high-momentum nucleons and short-range structures in nuclei.

Author

Fomin N, Arrington J, Asaturyan R, Benmokhtar F, Boeglin W, Bosted P, Bruell A, Bukhari MH, Christy ME, Chudakov E, Clasie B, Connell SH, Dalton MM, Daniel A, Day DB, Dutta D, Ent R, El Fassi L, Fenker H, Filippone BW, Garrow K, Gaskell D, Hill C, Holt RJ, Horn T, Jones MK, Jourdan J, Kalantarians N, Keppel CE, Kiselev D, Kotulla M, Lindgren R, Lung AF, Malace S, Markowitz P, McKee P, Meekins DG, Mkrtchyan H, Navasardyan T, Niculescu G, Opper AK, Perdrisat C, Potterveld DH, Punjabi V, Qian X, Reimer PE, Roche J, Rodriguez VM, Rondon O, Schulte E, Seely J, Segbefia E, Slifer K, Smith GR, Solvignon P, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Tvaskis V, Vulcan WF, Wasko C, Wesselmann FR, Wood SA, Wright J, and Zheng X

Abstract

We present new measurements of electron scattering from high-momentum nucleons in nuclei. These data allow an improved determination of the strength of two-nucleon correlations for several nuclei, including light nuclei where clustering effects can, for the first time, be examined. The data also include the kinematic region where three-nucleon correlations are expected to dominate.

Published
2012
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11. Scaling of the F2 structure function in nuclei and quark distributions at x>1.

Author

Fomin N, Arrington J, Day DB, Gaskell D, Daniel A, Seely J, Asaturyan R, Benmokhtar F, Boeglin W, Boillat B, Bosted P, Bruell A, Bukhari MH, Christy ME, Chudakov E, Clasie B, Connell SH, Dalton MM, Dutta D, Ent R, El Fassi L, Fenker H, Filippone BW, Garrow K, Hill C, Holt RJ, Horn T, Jones MK, Jourdan J, Kalantarians N, Keppel CE, Kiselev D, Kotulla M, Lindgren R, Lung AF, Malace S, Markowitz P, McKee P, Meekins DG, Miyoshi T, Mkrtchyan H, Navasardyan T, Niculescu G, Okayasu Y, Opper AK, Perdrisat C, Potterveld DH, Punjabi V, Qian X, Reimer PE, Roche J, Rodriguez VM, Rondon O, Schulte E, Segbefia E, Slifer K, Smith GR, Solvignon P, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Tvaskis V, Vulcan WF, Wasko C, Wesselmann FR, Wood SA, Wright J, and Zheng X

Abstract

We present new data on electron scattering from a range of nuclei taken in Hall C at Jefferson Lab. For heavy nuclei, we observe a rapid falloff in the cross section for x>1, which is sensitive to short-range contributions to the nuclear wave function, and in deep inelastic scattering corresponds to probing extremely high momentum quarks. This result agrees with higher energy muon scattering measurements, but is in sharp contrast to neutrino scattering measurements which suggested a dramatic enhancement in the distribution of the "superfast" quarks probed at x>1. The falloff at x>1 is noticeably stronger in 2H and 3He, but nearly identical for all heavier nuclei.

Published
2010
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12. Determination of the axial-vector weak coupling constant with ultracold neutrons.

Author

Liu J, Mendenhall MP, Holley AT, Back HO, Bowles TJ, Broussard LJ, Carr R, Clayton S, Currie S, Filippone BW, García A, Geltenbort P, Hickerson KP, Hoagland J, Hogan GE, Hona B, Ito TM, Liu CY, Makela M, Mammei RR, Martin JW, Melconian D, Morris CL, Pattie RW Jr, Pérez Galván A, Pitt ML, Plaster B, Ramsey JC, Rios R, Russell R, Saunders A, Seestrom SJ, Sondheim WE, Tatar E, Vogelaar RB, VornDick B, Wrede C, Yan H, and Young AR

Abstract

A precise measurement of the neutron decay β asymmetry A₀ has been carried out using polarized ultracold neutrons from the pulsed spallation ultracold neutron source at the Los Alamos Neutron Science Center. Combining data obtained in 2008 and 2009, we report A₀ = -0.119 66±0.000 89{-0.001 40}{+0.001 23}, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon g{A}/g{V}=-1.275 90{-0.004 45}{+0.004 09}.

Published
2010
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13. New measurements of the European Muon Collaboration effect in very light nuclei.

Author

Seely J, Daniel A, Gaskell D, Arrington J, Fomin N, Solvignon P, Asaturyan R, Benmokhtar F, Boeglin W, Boillat B, Bosted P, Bruell A, Bukhari MH, Christy ME, Clasie B, Connell S, Dalton MM, Day D, Dunne J, Dutta D, El Fassi L, Ent R, Fenker H, Filippone BW, Gao H, Hill C, Holt RJ, Horn T, Hungerford E, Jones MK, Jourdan J, Kalantarians N, Keppel CE, Kiselev D, Kotulla M, Lee C, Lung AF, Malace S, Meekins DG, Mertens T, Mkrtchyan H, Navasardyan T, Niculescu G, Niculescu I, Nomura H, Okayasu Y, Opper AK, Perdrisat C, Potterveld DH, Punjabi V, Qian X, Reimer PE, Roche J, Rodriguez VM, Rondon O, Schulte E, Segbefia E, Slifer K, Smith GR, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Tvaskis V, Vulcan WF, Wesselmann FR, Wood SA, Wright J, Yuan L, and Zheng X

Abstract

New Jefferson Lab data are presented on the nuclear dependence of the inclusive cross section from (2)H, (3)He, (4)He, (9)Be and (12)C for 0.3 < x < 0.9, Q(2) approximately 3-6 GeV(2). These data represent the first measurement of the EMC effect for (3)He at large x and a significant improvement for (4)He. The data do not support previous A-dependent or density-dependent fits to the EMC effect and suggest that the nuclear dependence of the quark distributions may depend on the local nuclear environment.

Published
2009
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14. First measurement of the neutron beta asymmetry with ultracold neutrons.

Author

Pattie RW Jr, Anaya J, Back HO, Boissevain JG, Bowles TJ, Broussard LJ, Carr R, Clark DJ, Currie S, Du S, Filippone BW, Geltenbort P, García A, Hawari A, Hickerson KP, Hill R, Hino M, Hoedl SA, Hogan GE, Holley AT, Ito TM, Kawai T, Kirch K, Kitagaki S, Lamoreaux SK, Liu CY, Liu J, Makela M, Mammei RR, Martin JW, Melconian D, Meier N, Mendenhall MP, Morris CL, Mortensen R, Pichlmaier A, Pitt ML, Plaster B, Ramsey JC, Rios R, Sabourov K, Sallaska AL, Saunders A, Schmid R, Seestrom S, Servicky C, Sjue SK, Smith D, Sondheim WE, Tatar E, Teasdale W, Terai C, Tipton B, Utsuro M, Vogelaar RB, Wehring BW, Xu YP, Young AR, and Yuan J

Abstract

We report the first measurement of an angular correlation parameter in neutron beta decay using polarized ultracold neutrons (UCN). We utilize UCN with energies below about 200 neV, which we guide and store for approximately 30 s in a Cu decay volume. The interaction of the neutron magnetic dipole moment with a static 7 T field external to the decay volume provides a 420 neV potential energy barrier to the spin state parallel to the field, polarizing the UCN before they pass through an adiabatic fast passage spin flipper and enter a decay volume, situated within a 1 T field in a 2x2pi solenoidal spectrometer. We determine a value for the beta-asymmetry parameter A&#95;{0}=-0.1138+/-0.0046+/-0.0021.

Published
2009
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15. Longitudinal-transverse separations of deep-inelastic structure functions at low Q2 for hydrogen and deuterium.

Author

Tvaskis V, Christy ME, Arrington J, Asaturyan R, Baker OK, Blok HP, Bosted P, Boswell M, Bruell A, Cochran A, Cole L, Crowder J, Dunne J, Ent R, Fenker HC, Filippone BW, Garrow K, Gasparian A, Gomez J, Jackson HE, Keppel CE, Kinney E, Lapikás L, Liang Y, Lorenzon W, Lung A, Mack DJ, Martin JW, McIlhany K, Meekins D, Milner RG, Mitchell JH, Mkrtchyan H, Moreland B, Nazaryan V, Niculescu I, Opper A, Piercey RB, Potterveld DH, Rose B, Sato Y, Seo W, Smith G, Spurlock K, van der Steenhoven G, Stepanyan S, Tadevosian V, Uzzle A, Vulcan WF, Wood SA, Zihlmann B, and Ziskin V

Abstract

We report on a study of the longitudinal to transverse cross section ratio, R=sigmaL/sigmaT, at low values of x and Q2, as determined from inclusive inelastic electron-hydrogen and electron-deuterium scattering data from Jefferson Laboratory Hall C spanning the four-momentum transfer range 0.06

Published
2007
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16. Parity-violating electron deuteron scattering and the proton's neutral weak axial vector form factor.

Author

Ito TM, Averett T, Barkhuff D, Batigne G, Beck DH, Beise EJ, Blake A, Breuer H, Carr R, Clasie B, Covrig S, Danagoulian A, Dodson G, Dow K, Dutta D, Farkhondeh M, Filippone BW, Franklin W, Furget C, Gao H, Gao J, Gustafsson K, Hannelius L, Hasty R, Hawthorne-Allen AM, Herda MC, Jones CE, King P, Korsch W, Kowalski S, Kox S, Kramer K, Lee P, Liu J, Martin JW, McKeown RD, Mueller B, Pitt ML, Plaster B, Quéméner G, Réal JS, Ritter J, Roche J, Savu V, Schiavilla R, Seely J, Spayde D, Suleiman R, Taylor S, Tieulent R, Tipton B, Tsentalovich E, Wells SP, Yang B, Yuan J, Yun J, and Zwart T

Abstract

We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from the deuteron at backward angles at Q2=0.038 (GeV/c)2. This quantity provides a determination of the neutral weak axial vector form factor of the nucleon, which can potentially receive large electroweak corrections. The measured asymmetry A=-3.51+/-0.57 (stat)+/-0.58 (syst) ppm is consistent with theoretical predictions. We also report on updated results of the previous experiment at Q2=0.091 (GeV/c)2, which are also consistent with theoretical predictions.

Published
2004
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17. Evidence for quark-hadron duality in the proton spin asymmetry A1.

Author

Airapetian A, Akopov N, Akopov Z, Amarian M, Ammosov VV, Aschenauer EC, Avakian H, Avakian R, Avetissian A, Avetissian E, Bailey P, Baturin V, Baumgarten C, Beckmann M, Belostotski S, Bernreuther S, Bianchi N, Blok HP, Böttcher H, Borissov A, Bouhali O, Bouwhuis M, Brack J, Brauksiepe S, Brüll A, Brunn I, Bulten HJ, Capitani GP, Cisbani E, Ciullo G, Court GR, Dalpiaz PF, De Leo R, De Nardo L, De Sanctis E, Devitsin E, de Witt Huberts PK, Di Nezza P, Düren M, Ehrenfried M, Elbakian G, Ellinghaus F, Elschenbroich U, Ely J, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Filippone BW, Fischer H, Fox B, Franz J, Frullani S, Gärber Y, Gapienko V, Garibaldi F, Garutti E, Gavrilov G, Gharibyan V, Graw G, Grebeniouk O, Green PW, Greeniaus LG, Gute A, Haeberli W, Hafidi K, Hartig M, Hasch D, Heesbeen D, Heinsius FH, Henoch M, Hertenberger R, Hesselink WH, Hofman G, Holler Y, Holt RJ, Hommez B, Iarygin G, Izotov A, Jackson HE, Jgoun A, Jung P, Kaiser R, Kinney E, Kisselev A, Kitching P, Königsmann K, Kolster H, Kopytin M, Korotkov V, Kotik E, Kozlov V, Krauss B, Krivokhijine VG, Kyle G, Lagamba L, Laziev A, Lenisa P, Liebing P, Lindemann T, Lorenzon W, Maas A, Makins NC, Marukyan H, Masoli F, Menden F, Mexner V, Meyners N, Mikloukho O, Miller CA, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaeva K, Nowak WD, Oganessyan K, Orlandi G, Podiatchev S, Potashov S, Potterveld DH, Raithel M, Rappoport V, Reggiani D, Reimer P, Reischl A, Reolon AR, Rith K, Rostomyan A, Ryckbosch D, Sakemi Y, Sanjiev I, Sato F, Savin I, Scarlett C, Schäfer A, Schill C, Schmidt F, Schnell G, Schüler KP, Schwind A, Seibert J, Seitz B, Shanidze R, Shibata TA, Shutov V, Simani MC, Sinram K, Stancari M, Steffens E, Steijger JJ, Stewart J, Stösslein U, Suetsugu K, Taroian S, Terkulov A, Tessarin S, Thomas E, Tipton B, Tytgat M, Urciuoli GM, van den Brand JF, van der Steenhoven G, van de Vyver R, Vetterli MC, Vikhrov V, Vincter MG, Visser J, Volmer J, Weiskopf C, Wendland J, Wilbert J, Wise T, Yen S, Yoneyama S, Zihlmann B, and Zohrabian H

Abstract

Spin-dependent lepton-nucleon scattering data have been used to investigate the validity of the concept of quark-hadron duality for the spin asymmetry A1. Longitudinally polarized positrons were scattered off a longitudinally polarized hydrogen target for values of Q2 between 1.2 and 12 GeV2 and values of W2 between 1 and 4 GeV2. The average double-spin asymmetry in the nucleon resonance region is found to agree with that measured in deep-inelastic scattering at the same values of the Bjorken scaling variable x. This finding implies that the description of A1 in terms of quark degrees of freedom is valid also in the nucleon resonance region for values of Q2 above 1.6 GeV2.

Published
2003
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18. Measurements of ultracold-neutron lifetimes in solid deuterium.

Author

Morris CL, Anaya JM, Bowles TJ, Filippone BW, Geltenbort P, Hill RE, Hino M, Hoedl S, Hogan GE, Ito TM, Kawai T, Kirch K, Lamoreaux SK, Liu CY, Makela M, Marek LJ, Martin JW, Mortensen RN, Pichlmaier A, Saunders A, Seestrom SJ, Smith D, Teasdale W, Tipton B, Utsuro M, Young AR, and Yuan J

Abstract

We present the first measurements of the survival time of ultracold neutrons (UCNs) in solid deuterium (SD2). This critical parameter provides a fundamental limitation to the effectiveness of superthermal UCN sources that utilize solid ortho-deuterium as the source material. These measurements are performed utilizing a SD2 source coupled to a spallation source of neutrons, providing a demonstration of UCN production in this geometry and permitting systematic studies of the influence of thermal up-scatter and contamination with para-deuterium on the UCN survival time.

Published
2002
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19. Precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e, e').

Author

Xiong F, Dutta D, Xu W, Anderson B, Auberbach L, Averett T, Bertozzi W, Black T, Calarco J, Cardman L, Cates GD, Chai ZW, Chen JP, Choi S, Chudakov E, Churchwell S, Corrado GS, Crawford C, Dale D, Deur A, Djawotho P, Filippone BW, Finn JM, Gao H, Gilman R, Glamazdin AV, Glashausser C, Glöckle W, Golak J, Gomez J, Gorbenko VG, Hansen JO, Hersman FW, Higinbotham DW, Holmes R, Howell CR, Hughes E, Humensky B, Incerti S, de Jager CW, Jensen JS, Jiang X, Jones CE, Jones M, Kahl R, Kamada H, Kievsky A, Kominis I, Korsch W, Kramer K, Kumbartzki G, Kuss M, Lakuriqi E, Liang M, Liyanage N, LeRose J, Malov S, Margaziotis DJ, Martin JW, McCormick K, McKeown RD, McIlhany K, Meziani ZE, Michaels R, Miller GW, Pace E, Pavlin T, Petratos GG, Pomatsalyuk RI, Pripstein D, Prout D, Ransome RD, Roblin Y, Rvachev M, Saha A, Salmè G, Schnee M, Shin T, Slifer K, Souder PA, Strauch S, Suleiman R, Sutter M, Tipton B, Todor L, Viviani M, Vlahovic B, Watson J, Williamson CF, Witała H, Wojtsekhowski B, Yeh J, and Zołnierczuk P

Abstract

We present the first precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e,e') at Q2 values of 0.1 and 0.2 (GeV/c)2. The agreement between the data and nonrelativistic Faddeev calculations which include both final-state interactions and meson-exchange current effects is very good at Q2 = 0.1 (GeV/c)2, while a small discrepancy at Q2 = 0.2 (GeV/c)2 is observed.

Published
2001
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20. Strange magnetism and the anapole structure of the proton.

Author

Hasty R, Hawthorne-Allen AM, Averett T, Barkhuff D, Beck DH, Beise EJ, Blake A, Breuer H, Carr R, Covrig S, Danagoulian A, Dodson G, Dow K, Farkhondeh M, Filippone BW, Gao J, Herda MC, Ito TM, Jones CE, Korsch W, Kramer K, Kowalski S, Lee P, McKeown RD, Mueller B, and Pitt M

Abstract

The violation of mirror symmetry in the weak force provides a powerful tool to study the internal structure of the proton. Experimental results have been obtained that address the role of strange quarks in generating nuclear magnetism. The measurement reported here provides an unambiguous constraint on strange quark contributions to the proton's magnetic moment through the electron-proton weak interaction. We also report evidence for the existence of a parity-violating electromagnetic effect known as the anapole moment of the proton. The proton's anapole moment is not yet well understood theoretically, but it could have important implications for precision weak interaction studies in atomic systems such as cesium.

Published
2000
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21. Transverse asymmetry AT' from the quasielastic 3He(e,e') process and the neutron magnetic form factor.

Author

Xu W, Dutta D, Xiong F, Anderson B, Auberbach L, Averett T, Bertozzi W, Black T, Calarco J, Cardman L, Cates GD, Chai ZW, Chen JP, Choi S, Chudakov E, Churchwell S, Corrado GS, Crawford C, Dale D, Deur A, Djawotho P, Filippone BW, Finn JM, Gao H, Gilman R, Glamazdin AV, Glashausser C, Glöckle W, Golak J, Gomez J, Gorbenko VG, Hansen JO, Hersman FW, Higinbotham DW, Holmes R, Howell CR, Hughes E, Humensky B, Incerti S, de Jager CW, Jensen JS, Jiang X, Jones CE, Jones M, Kahl R, Kamada H, Kievsky A, Kominis I, Korsch W, Kramer K, Kumbartzki G, Kuss M, Lakuriqi E, Liang M, Liyanage N, LeRose J, Malov S, Margaziotis DJ, Martin JW, McCormick K, McKeown RD, McIlhany K, Meziani ZE, Michaels R, Miller GW, Pace E, Pavlin T, Petratos GG, Pomatsalyuk RI, Pripstein D, Prout D, Ransome RD, Roblin Y, Rvachev M, Saha A, Salmè G, Schnee M, Shin T, Slifer K, Souder PA, Strauch S, Suleiman R, Sutter M, Tipton B, Todor L, Viviani M, Vlahovic B, Watson J, Williamson CF, Witała H, Wojtsekhowski B, Yeh J, and Zołnierczuk P

Abstract

We have measured the transverse asymmetry A(T') in 3He(e,e(')) quasielastic scattering in Hall A at Jefferson Laboratory with high precision for Q2 values from 0.1 to 0.6 (GeV/c)(2). The neutron magnetic form factor G(n)(M) was extracted based on Faddeev calculations for Q2 = 0.1 and 0.2 (GeV/c)(2) with an experimental uncertainty of less than 2%.

Published
2000
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22. Experimental verification of quark-hadron duality

Author

Niculescu I I, Armstrong CS, Arrington J, Assamagan KA, Baker OK, Beck DH, Bochna CW, Carlini RD, Cha J, Cothran C, Day DB, Dunne JA, Dutta D, Ent R, Filippone BW, Frolov VV, Gao H, Geesaman DF, Gueye PL, Hinton W, Holt RJ, Jackson HE, Keppel CE, Koltenuk DM, Mack DJ, and Meekins DG

Abstract

A newly obtained sample of inclusive electron-nucleon scattering data has been analyzed for precision tests of quark-hadron duality. The data are in the nucleon resonance region, and span the range 0. 3

Published
2000
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23. Parity violation in elastic electron-proton scattering and the Proton's strange magnetic form factor

Author

Spayde DT, Averett T, Barkhuff D, Beck DH, Beise EJ, Benson C, Breuer H, Carr R, Covrig S, DelCorso J, Dodson G, Dow K, Eppstein C, Farkhondeh M, Filippone BW, Frazier P, Hasty R, Ito TM, Jones CE, Korsch W, Kowalski S, Lee P, Maneva E, McCarty K, McKeown RD, and Mikell J

Abstract

We report a new measurement of the parity-violating asymmetry in elastic electron scattering from the proton at backward scattering angles. This asymmetry is sensitive to the strange magnetic form factor of the proton as well as electroweak axial radiative corrections. The new measurement of A = -4.92+/-0.61+/-0.73 ppm provides a significant constraint on these quantities. The implications for the strange magnetic form factor are discussed in the context of theoretical estimates for the axial corrections.

Published
2000
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24. Inclusive electron scattering from nuclei at x~=1.

Author

Arrington J, Anthony P, Arnold RG, Beise EJ, Belz JE, Bosted PE, Bulten H, Chapman MS, Coulter KP, Dietrich F, Ent R, Epstein M, Filippone BW, Gao H, Gearhart RA, Geesaman DF, Hansen J, Holt RJ, Jackson HE, Jones CE, Keppel CE, Kinney ER, Kuhn S, Lee K, Lorenzon W, Lung A, Makins NC, Margaziotis DJ, McKeown RD, Milner RG, Mueller B, Napolitano J, Nelson J, O'Neill TG, Papavassiliou V V, Petratos GG, Potterveld DH, Rock SE, Spengos M, Szalata ZM, Tao LH, van Bibber K, van den Brand JF, White JL, Winter D, and Zeidman B

Published
1996
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25. Evidence for virtual Compton scattering from the proton.

Author

van den Brand JF, Ent R, Anthony PL, Arnold RG, Arrington J, Beise EJ, Belz JE, Bosted PE, Bulten H, Chapman MS, Coulter KP, Dietrich FS, Epstein M, Filippone BW, Gao H, Gearhart RA, Geesaman DF, Hansen J, Holt RJ, Jackson HE, Jones CE, Keppel CE, Kinney ER, Kuhn S, Lee K, Lorenzon W, Lung A, Makins NC, Margaziotis DJ, McKeown RD, Milner RG, Mueller B, Napolitano J, Nelson J, O'Neill TG, Papavassiliou V V, Petratos GG, Potterveld DH, Rock SE, Spengos M, Szalata ZM, Tao LH, van Bibber K, Wasson DA, White JL, and Zeidman B

Published
1995
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26. Measurement of the spin-dependent asymmetry in 3He

Author

Jones CE, Arrington J, Beise EJ, Bray B, Carr RW, Filippone BW, Gao H, Lung A, McKeown RD, Mueller B, Pitt ML, DeSchepper D, Dodson G, Dow K, Ent R, Farkhondeh M, Hansen J, Korsch W, Kramer LH, Lee K, Makins NC, Milner RG, Tieger DR, Welch TP, Candell E, Napolitano J, Tripp C, Wojtsekhowski BB, and Lorenzon W

Published
1995
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27. Exclusive electron scattering from deuterium at high momentum transfer.

Author

Bulten HJ, Anthony PL, Arnold RG, Arrington J, Beise EJ, Belz E, van Bibber K, Bosted PE, van den Brand JF, Chapman MS, Coulter KP, Dietrich FS, Ent R, Epstein M, Filippone BW, Gao H, Gearhart RA, Geesaman DF, Hansen J, Holt RJ, Jackson HE, Jones CE, Keppel CE, Kinney E, Kuhn SE, Lee K, Lorenzon W, Lung A, Makins NC, Margaziotis DJ, McKeown RD, Milner RG, Mueller B, Napolitano J, Nelson J, O'Neill TG, Papavassiliou V V, Petratos GG, Potterveld DH, Rock SE, Spengos M, Szalata ZM, Tao LH, White JL, and Zeidman B

Published
1995
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28. Two-Body Photodisintegration of the Deuteron up to 2.8 GeV.

Author

Belz JE, Potterveld DH, Anthony P, Arnold RG, Arrington J, Beck D, Beise EJ, Bosted PE, Bulten H, Chapman MS, Coulter KP, Dietrich F, Ent R, Epstein M, Filippone BW, Gao H, Gearhart RA, Geesaman DF, Hansen J, Holt RJ, Jackson HE, Jones CE, Keppel CE, Kinney ER, Kuhn S, Lee K, Lorenzon W, Lung A, Makins NC, Margaziotis DJ, McKeown RD, Meziani ZE, Milner RG, Mueller B, Napolitano J, Nelson J, O'Neill TG, Papavassiliou V V, Petratos GG, Rock SE, Segel RE, Spengos M, Szalata ZM, Tao LH, van Bibber K, van den Brand JF, White JL, and Zeidman B

Published
1995
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29. Transverse-Longitudinal Asymmetry in the Quasielastic 3He-->(e

Author

Hansen J, Titko MA, DeSchepper D, Dodson G, Donnelly TW, Dow K, Ent R, Farkhondeh M, Korsch W, Kramer LH, Lee K, Makins NC, Milner RG, Tieger DR, Welch TP, Jones CE, Arrington J, Beise EJ, Bray B, Carr RW, Filippone BW, Gao H, Lung A, McKeown RD, Mueller B, Pitt ML, Schulze R, Sauer PU, Candell E, Napolitano J, Tripp C, Wojtsekhowski BB, and Lorenzon W

Published
1995
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32. Measurement of kinematic and nuclear dependence of R= sigma L/ sigma T in deep inelastic electron scattering.

Author

Dasu S, de Barbaro P, Bodek A, Harada H, Krasny MW, Lang K, Riordan EM, Andivahis L, Arnold R, Benton D, Bosted P, deChambrier G, Lung A, Rock SE, Szalata ZM, Walker RC, Filippone BW, Jourdan J, Milner R, McKeown R, Potterveld D, Para A, Dietrich F, Van Bibber K, Button-Shafer J, Debebe B, Hicks RS, Gearhart R, Whitlow LW, and Alster J

Published
1994
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33. Momentum transfer dependence of nuclear transparency from the quasielastic 12C(e,e'p) reaction.

Author

Makins NC, Ent R, Chapman MS, Hansen J, Lee K, Milner RG, Nelson J, Arnold RG, Bosted PE, Keppel CE, Lung A, Rock SE, Spengos M, Szalata ZM, Tao LH, White JL, Coulter KP, Geesaman DF, Holt RJ, Jackson HE, Papavassiliou V V, Potterveld DH, Zeidman B, Arrington J, Beise EJ, Belz E, Filippone BW, Gao H, Lorenzon W, Mueller B, McKeown RD, O'Neill TG, Epstein M, Margaziotis DJ, Napolitano J, Kinney E, Anthony PL, van Bibber K, Dietrich FS, Gearhart RA, Patratos GG, Kuhn SE, van den Brand JF, Bulten H, and Jones CE

Published
1994
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35. Two-body disintegration of the deuteron with 0.8-1.8 GeV photons.

Author

Freedman SJ, Geesaman DF, Gilman R, Green MC, Holt RJ, Jackson HE, Kinney ER, Kowalczyk R, Marchand C, Napolitano J, Nelson J, Potterveld DH, Zeidman B, Segel RE, Tung T, Beck D, Boyd G, Collins D, Filippone BW, Jones CE, Jourdan J, McKeown RD, Milner R, Walker R, Bosted PE, Meziani Z, and Minehart R

Published
1993
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37. He-vector3(e-vectore') quasielastic asymmetry.

Author

Jones CE, Beise EJ, Belz JE, Carr RW, Filippone BW, Lorenzon W, McKeown RD, Mueller BA, O'Neill TG, Dodson GW, Dow K, Farkhondeh M, Kowalski S, Lee K, Makins N, Milner R, Thompson A, Tieger D, van den Brand JF, Young A, Yu X, and Zumbro JD

Published
1993
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46. Measurement of the difference in R= sigma L/ sigma T and of sigma A/ sigma D in deep-inelastic e-D, e-Fe, and e-Au scattering.

Author

Dasu S, de Barbaro P, Bodek A, Harada H, Krasny MW, Lang K, Riordan EM, Arnold R, Benton D, Bosted P, Clogher L, deChambrier G, Lung A, Rock SE, Szalata ZM, Walker RC, Filippone BW, Jourdan J, Milner R, McKeown R, Potterveld D, Para A, Dietrich F, Van Bibber K, Button-Shafer J, Debebe B, Hicks RS, Gearhart R, Whitlow LW, and Alster J

Published
1988
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