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 Title
 Measurements Of Omega() Branching Fractions.
 Creator

Xiao, T., Dobbs, S., Tomaradze, A., Seth, Kamal K.
 Abstract/Description

Using e(+)e() annihilation data taken with the CLEOc detector, measurements of two major Obranching fractions have been made using the reaction psi(2S) > Omega()(Omega) over bar (+) . The Omega() decay channels are identified through momentum distributions of charged particles, and systematics of the Omega() branching fractions have been studied. The results are B(Omega() > Lambda(0) K) = (68.9 +/ 9.5 +/ 4.3)% and B(Omega() > Xi pi(0)) = (19.0 +/ 4.0 +/ 1.2)%.
 Date Issued
 20180731
 Identifier
 FSU_libsubv1_wos_000440384800001, 10.1103/PhysRevD.98.012007
 Format
 Citation
 Title
 Photoproduction Of K+ K Meson Pairs On The Proton.
 Creator

Lombardo, S., Battaglieri, M., Celentano, A., D'Angelo, A., De Vita, R., Filippi, A., Glazier, D. I., Hughes, S. M., Mathieu, V., Rizzo, A., Santopinto, E., Stankovic, I.,...
Show moreLombardo, S., Battaglieri, M., Celentano, A., D'Angelo, A., De Vita, R., Filippi, A., Glazier, D. I., Hughes, S. M., Mathieu, V., Rizzo, A., Santopinto, E., Stankovic, I., Szczepaniak, A. P., Watts, D., Zana, L., Adhikari, S., Akbar, Z., Avakian, H., Ball, J., Baltzell, N. A., Barion, L., Bashkanov, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Burkert, V. D., Cao, F., Carman, D. S., Chatagnon, P., Chetry, T., Ciullo, G., Clark, L., Clary, B. A., Cole, P. L., Contalbrigo, M., Crede, V., Dashyan, N., De Sanctis, E., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., Ehrhart, M., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Johnston, S., Joo, K., Kabir, M. L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., Marchand, D., Markov, N., McKinnon, B., Mestayer, M. D., Meyer, C. A., Meziani, Z. E., Mirazita, M., Mokeev, V., Montgomery, R. A., Camacho, C. Munoz, NadelTuronski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Ripani, M., Riser, D., Ritchie, B. G., Rosner, G., Sabatie, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu, Smith, G. D., Sober, D. I., Sokhan, D., Sparveris, N., Strakovsky, I. I., Strauch, S., Taiuti, M., Tan, J. A., Ungaro, M., Voskanyan, H., Voutier, E., Wang, R., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., Zhao, Z. W.
Show less  Abstract/Description

The exclusive reaction gamma p > pK(+) K was studied in the photon energy range 3.03.8 GeV and momentum transfer range 0.6 < t < 1.3 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. In this kinematic range the integrated luminosity was approximately 20 pb(1). The reaction was isolated by detecting the K+ and the proton in CLAS, and reconstructing the K via the missingmass technique. Moments of the dikaon decay angular distributions...
Show moreThe exclusive reaction gamma p > pK(+) K was studied in the photon energy range 3.03.8 GeV and momentum transfer range 0.6 < t < 1.3 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. In this kinematic range the integrated luminosity was approximately 20 pb(1). The reaction was isolated by detecting the K+ and the proton in CLAS, and reconstructing the K via the missingmass technique. Moments of the dikaon decay angular distributions were extracted from the experimental data. Besides the dominant contribution of the phi meson in the P wave, evidence for S  P interference was found. The differential production cross sections d sigma/dt for individual waves in the mass range of the phi resonance were extracted and compared to predictions of a Reggeinspired model. This is the first time the tdependent cross section of the Swave contribution to the elastic K+ K photoproduction has been measured.
Show less  Date Issued
 20180927
 Identifier
 FSU_libsubv1_wos_000445969800001, 10.1103/PhysRevD.98.052009
 Format
 Citation
 Title
 Enhanced Threshold Resummation Formalism For Lepton Pair Production And Its Effects In The Determination Of Parton Distribution Functions.
 Creator

Westmark, David, Owens, J. F.
 Abstract/Description

We demonstrate that theoretical predictions using current resummation techniques for the lepton pair production (LPP) rapidity and x(F) distributions can be inconsistent with data in high rapidity and x(F) kinematic regions by observing their effect in global fits of parton distribution functions (PDFs). We present an enhanced resummation technique for the LPP rapidity and x(F) distributions that agrees with LPP data. The enhanced resummation method is used in conjunction with threshold...
Show moreWe demonstrate that theoretical predictions using current resummation techniques for the lepton pair production (LPP) rapidity and x(F) distributions can be inconsistent with data in high rapidity and x(F) kinematic regions by observing their effect in global fits of parton distribution functions (PDFs). We present an enhanced resummation technique for the LPP rapidity and x(F) distributions that agrees with LPP data. The enhanced resummation method is used in conjunction with threshold resummation in deep inelastic scattering to perform two global fits of PDFs using the minimal and Borel prescriptions. The results are analyzed to determine the effect of threshold resummation on global fits of PDFs.
Show less  Date Issued
 20170331
 Identifier
 FSU_libsubv1_wos_000399145800008, 10.1103/PhysRevD.95.056024
 Format
 Citation
 Title
 Higgs Boson Production In Association With B Jets In The Powheg Box.
 Creator

Jaeger, B., Reina, L., Wackeroth, D.
 Abstract/Description

The hadronic production of a Higgs boson (H) in association with b jets will play an important role in investigating the Higgsboson couplings to Standard Model (SM) particles during Run II of the CERN Large Hadron Collider, and could in particular reveal the presence of anomalies in the assumed hierarchy of Yukawa couplings to the thirdgeneration quarks. A very high degree of accuracy in the theoretical description of this process is crucial to implement the rich physics program that could...
Show moreThe hadronic production of a Higgs boson (H) in association with b jets will play an important role in investigating the Higgsboson couplings to Standard Model (SM) particles during Run II of the CERN Large Hadron Collider, and could in particular reveal the presence of anomalies in the assumed hierarchy of Yukawa couplings to the thirdgeneration quarks. A very high degree of accuracy in the theoretical description of this process is crucial to implement the rich physics program that could lead to either direct or indirect evidence of new physics from Higgsboson measurements. Aiming for accuracy in the theoretical modeling of H + bjet production, we have interfaced the analytic nexttoleadingorder QCD calculation of Hb (b) over bar production with partonshower Monte Carlo event generators in the POWHEG BOX framework. In this paper we describe the most relevant aspects of the implementation and present results for the production of H + 1b jet, H + 2b jets, and H with no tagged b jets, in the form of kinematic distributions of the Higgs boson, of the b jets, and of the nonb jets, at the 13 TeV Large Hadron Collider. The corresponding code is part of the public release of the POWHEG BOX.
Show less  Date Issued
 20160126
 Identifier
 FSU_libsubv1_wos_000369325200003, 10.1103/PhysRevD.93.014030
 Format
 Citation
 Title
 Ncteq15.
 Creator

Kovarik, K., Kusina, A., Jezo, T., Clark, D. B., Keppel, C., Lyonnet, F., Morfin, J. G., Olness, F. I., Owens, J. F., Schienbein, I., Yu, J. Y.
 Abstract/Description

We present the new nCTEQ15 set of nuclear parton distribution functions (PDFs) with uncertainties. This fit extends the CTEQ proton PDFs to include the nuclear dependence using data on nuclei all the way up to Pb208. The uncertainties are determined using the Hessian method with an optimal rescaling of the eigenvectors to accurately represent the uncertainties for the chosen tolerance criteria. In addition to the deep inelastic scattering and DrellYan processes, we also include inclusive...
Show moreWe present the new nCTEQ15 set of nuclear parton distribution functions (PDFs) with uncertainties. This fit extends the CTEQ proton PDFs to include the nuclear dependence using data on nuclei all the way up to Pb208. The uncertainties are determined using the Hessian method with an optimal rescaling of the eigenvectors to accurately represent the uncertainties for the chosen tolerance criteria. In addition to the deep inelastic scattering and DrellYan processes, we also include inclusive pion production data from the Relativistic Heavy Ion Collider to help constrain the nuclear gluon PDF. Furthermore, we investigate the correlation of the data sets with specific nuclear PDF flavor components and asses the impact of individual experiments. We also provide comparisons of the nCTEQ15 set with recent fits from other groups.
Show less  Date Issued
 20160428
 Identifier
 FSU_libsubv1_wos_000374960700007, 10.1103/PhysRevD.93.085037
 Format
 Citation
 Title
 Constraints On Largex Parton Distributions From New Weak Boson Production And Deepinelastic Scattering Data.
 Creator

Accardi, A., Brady, L. T., Melnitchouk, W., Owens, J. F., Sato, N.
 Abstract/Description

We present a new set of leadingtwist parton distribution functions, referred to as "CJ15," which take advantage of developments in the theoretical treatment of nuclear corrections as well as new data. The analysis includes, for the first time, data on the free neutron structure function from Jefferson Lab and new highprecision charged lepton and Wboson asymmetry data from Fermilab. These significantly reduce the uncertainty on the d/u ratio at large values of x and provide new insights...
Show moreWe present a new set of leadingtwist parton distribution functions, referred to as "CJ15," which take advantage of developments in the theoretical treatment of nuclear corrections as well as new data. The analysis includes, for the first time, data on the free neutron structure function from Jefferson Lab and new highprecision charged lepton and Wboson asymmetry data from Fermilab. These significantly reduce the uncertainty on the d/u ratio at large values of x and provide new insights into the partonic structure of bound nucleons.
Show less  Date Issued
 20160620
 Identifier
 FSU_libsubv1_wos_000378203800004, 10.1103/PhysRevD.93.114017
 Format
 Citation
 Title
 Delta(c) Semileptonic Decays In A Quark Model.
 Creator

Hussain, Md Mozammel, Roberts, Winston
 Abstract/Description

Hadronic form factors for semileptonic decay of the Lambda(c) are calculated in a nonrelativistic quark model. The full quark model wave functions are employed to numerically calculate the form factors to all relevant orders in ( 1/m(c), 1/m(s)). The form factors obtained satisfy relationships expected from the heavy quark effective theory ( HQET). The differential decay rates and branching fractions are calculated for transitions to the ground state and a number of excited states of Lambda...
Show moreHadronic form factors for semileptonic decay of the Lambda(c) are calculated in a nonrelativistic quark model. The full quark model wave functions are employed to numerically calculate the form factors to all relevant orders in ( 1/m(c), 1/m(s)). The form factors obtained satisfy relationships expected from the heavy quark effective theory ( HQET). The differential decay rates and branching fractions are calculated for transitions to the ground state and a number of excited states of Lambda The branching fraction of the semileptonic decay width to the total width of Lambda(c) has been calculated and compared with other theoretical estimates and experimental results. The branching fractions for Lambda(c) >Lambda*iota(+)nu(iota)>Sigma pi iota(+)nu(iota) and Lambda(c) > Lambda*iota(+)nu(iota) > NK iota(+)nu(iota) are also calculated. Apart from decays to the ground state Lambda(1115), it is found that decays through the Lambda(1405) provide a significant portion of the branching fraction Lambda(c) > Xs iota nu(iota). A new estimate for f = B(Lambda(+)(c) > Lambda iota(+) nu(iota))/B(Lambda(+)(c) > Chi(+)(s) nu(iota)) is obtained.
Show less  Date Issued
 20170313
 Identifier
 FSU_libsubv1_wos_000396030900002, 10.1103/PhysRevD.95.053005
 Format
 Citation
 Title
 Precision Measurement Of The Hadronic Contribution To The Muon Anomalous Magnetic Moment.
 Creator

Xiao, T., Dobbs, S., Tomaradze, A., Seth, Kamal K., Bonvicini, G.
 Abstract/Description

We report on a precision measurement of the cross section for the reaction e(+)e() > pi(+) pi() in the mass range 0.30 < Mpi pi < 1.00 GeV/c(2) with the initial state radiation (ISR) method, using 817 pb(1) of data at e(+)e() center ofmass energies near 3.77 GeV and 586 pb(1) of data at e(+)e() centerofmass energies near 4.17 GeV, collected with the CLEOc detector at the CESR e(+)e() collider at Cornell University. The integrated cross sections in the range 0.30 < Mpi pi < 1.00...
Show moreWe report on a precision measurement of the cross section for the reaction e(+)e() > pi(+) pi() in the mass range 0.30 < Mpi pi < 1.00 GeV/c(2) with the initial state radiation (ISR) method, using 817 pb(1) of data at e(+)e() center ofmass energies near 3.77 GeV and 586 pb(1) of data at e(+)e() centerofmass energies near 4.17 GeV, collected with the CLEOc detector at the CESR e(+)e() collider at Cornell University. The integrated cross sections in the range 0.30 < Mpi pi < 1.00 GeV/c(2) for the process e(+)e() > pi(+) pi() are determined with a statistical uncertainty of 0.7% and a systematic uncertainty of 1.6%. The leadingorder hadronic contribution to the muon anomalous magnetic moment calculated using these measured e(+)e() > pi(+) pi() cross sections in the range Mpi pi = 0.30 to 1.00 GeV/c(2) is calculated to be (500.6 +/ 3.6(stat) +/ 8.0 (syst)) x 10(10).
Show less  Date Issued
 20180227
 Identifier
 FSU_libsubv1_wos_000426170300001, 10.1103/PhysRevD.97.032012
 Format
 Citation
 Title
 Soft Collinear Effective Theory For Gravity.
 Creator

Okui, Takemichi, Yunesi, Arash
 Abstract/Description

We present how to construct a soft collinear effective theory (SCET) for gravity at the leading and nexttoleading powers from the ground up. The soft graviton theorem and decoupling of collinear gravitons at the leading power are manifest from the outset in the effective symmetries of the theory. At the nexttoleading power, certain simple structures of amplitudes, which are completely obscure in Feynman diagrams of the full theory, are also revealed, which greatly simplifies calculations....
Show moreWe present how to construct a soft collinear effective theory (SCET) for gravity at the leading and nexttoleading powers from the ground up. The soft graviton theorem and decoupling of collinear gravitons at the leading power are manifest from the outset in the effective symmetries of the theory. At the nexttoleading power, certain simple structures of amplitudes, which are completely obscure in Feynman diagrams of the full theory, are also revealed, which greatly simplifies calculations. The effective Lagrangian is highly constrained by effectivelymultiple copies of diffeomorphism invariance that are inevitably present in gravity SCET due to mode separation, an essential ingredient of any SCET. Further explorations of effective theories of gravity with mode separation may shed light on Lagrangianlevel understandings of some of the surprising properties of gravitational scattering amplitudes. A gravity SCET with an appropriate inclusion of Glauber modes may serve as a powerful tool for studying gravitational scattering in the Regge limit.
Show less  Date Issued
 20180312
 Identifier
 FSU_libsubv1_wos_000427114700012, 10.1103/PhysRevD.97.066011
 Format
 Citation
 Title
 Topological Charge And Cooling Scales In Pure Su(2) Lattice Gauge Theory.
 Creator

Berg, Bernd A., Clarke, David A.
 Abstract/Description

Using Monte Carlo simulations with overrelaxation, we have equilibrated lattices up to beta = 2.928, size 60(4), for pure SU(2) lattice gauge theory with the Wilson action. We calculate topological charges with the standard cooling method and find that they become more reliable with increasing beta values and lattice sizes. Continuum limit estimates of the topological susceptibility chi are obtained of which we favor chi(1/4)/Tc = 0.643(12), where Tc is the SU(2) deconfinement temperature....
Show moreUsing Monte Carlo simulations with overrelaxation, we have equilibrated lattices up to beta = 2.928, size 60(4), for pure SU(2) lattice gauge theory with the Wilson action. We calculate topological charges with the standard cooling method and find that they become more reliable with increasing beta values and lattice sizes. Continuum limit estimates of the topological susceptibility chi are obtained of which we favor chi(1/4)/Tc = 0.643(12), where Tc is the SU(2) deconfinement temperature. Differences between cooling length scales in different topological sectors turn out to be too small to be detectable within our statistical errors.
Show less  Date Issued
 20180315
 Identifier
 FSU_libsubv1_wos_000427603400006, 10.1103/PhysRevD.97.054506
 Format
 Citation