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Articles 1  30 of 1442
FullText Articles in Physical Sciences and Mathematics
The Clas12 Software Framework And Event Reconstruction, V. Ziegler, N. A. Baltzell, F. Bossù, D. S. Carman, P. Chatanon, M. Contalbrigo, J. Newton, M. Ungaro
The Clas12 Software Framework And Event Reconstruction, V. Ziegler, N. A. Baltzell, F. Bossù, D. S. Carman, P. Chatanon, M. Contalbrigo, J. Newton, M. Ungaro
Physics Faculty Publications
We describe offline event reconstruction for the CEBAF Large Acceptance Spectrometer at 12 GeV (CLAS12), including an overview of the offline reconstruction framework and software tools, a description of the algorithms developed for the individual detector subsystems, and the overall approach for charged and neutral particle identification. We also present the scheme for data processing and the code management procedures.
Heavy Quark Expansion For HeavyLight LightCone Operators, Shuai Zhao
Heavy Quark Expansion For HeavyLight LightCone Operators, Shuai Zhao
Physics Faculty Publications
We generalize the celebrated heavy quark expansion to nonlocal QCD operators. By taking nonlocal heavylight current on the lightcone as an example, we confirm that the collinear singularities are common between QCD operator and the corresponding operator in heavy quark effective theory (HQET), at the leading power of 1/M expansion. Based on a perturbative calculation in operator form at oneloop level, a factorization formula linking QCD and HQET operators is investigated and the matching coefficient is determined. The matching between QCD and HQET lightcone distribution amplitudes (LCDAs) as well as other momentum distributions of hadron can be derived as ...
Star Formation In LowRedshift Cluster Dwarf Galaxies, Cody M. Rude, Madina R. Sultanova, Gihan L. Ipita Kaduwa Gamage, Wayne A. Barkhouse, Sandanuwan P. Kalawila Vithanage
Star Formation In LowRedshift Cluster Dwarf Galaxies, Cody M. Rude, Madina R. Sultanova, Gihan L. Ipita Kaduwa Gamage, Wayne A. Barkhouse, Sandanuwan P. Kalawila Vithanage
Physics Faculty Publications
Evolution of galaxies in dense environments can be affected by close encounters with neighbouring galaxies and interactions with the intracluster medium. Dwarf galaxies (dGs) are important as their low mass makes them more susceptible to these effects than giant systems. Combined luminosity functions (LFs) in the r and u band of 15 galaxy clusters were constructed using archival data from the Canada–France–Hawaii Telescope. LFs were measured as a function of clustercentric radius from stacked cluster data. Marginal evidence was found for an increase in the faintend slope of the uband LF relative to the rband with ...
Question 1: Car Flip; Question 2: A Mole Of People, Larry Weinstein
Question 1: Car Flip; Question 2: A Mole Of People, Larry Weinstein
Physics Faculty Publications
Consider mass, area, power, and food requirements. For more Fermi questions and answers, see Guesstimation 2.0: Solving Today's Problems on the Back of a Napkin, by Lawrence Weinstein (Princeton University Press, 2012). [Extracted from artcle]
Solutions For Fermi Questions, January 2020: Question 1: Car Flip; Question 2: A Mole Of People, Larry Weinstein
Solutions For Fermi Questions, January 2020: Question 1: Car Flip; Question 2: A Mole Of People, Larry Weinstein
Physics Faculty Publications
At what speed will a car flip over when it slides sideways into a curb? The angular momentum of the car will depend on its initial speed, the height of the curb, and the height of the centerofmass (CM) of the car. If we approximate the car as having all its mass located at its CM, then its initial angular momentum relative to the top of the curb is. [Extracted from the article]
Question 1: Plowing Snow; Question 2: Wasted Food, Larry Weinstein
Question 1: Plowing Snow; Question 2: Wasted Food, Larry Weinstein
Physics Faculty Publications
[Extracted from the article] How much snow is shoveled or plowed in the U.S. in a typical winter? How much food is wasted at school cafeterias every year in the U.S.? For more Fermi questions and answers, see Guesstimation 2.0: Solving Today's Problems on the Back of a Napkin, by Lawrence Weinstein (Princeton University Press, 2012).
LongRange Electroweak Amplitudes Of Single Hadrons From Euclidean FiniteVolume Correlation Functions, Raúl A. Briceño, Zohreh Davoudi, Maxwell T. Hansen, Matthias R. Schindler, Alessandro Baroni
LongRange Electroweak Amplitudes Of Single Hadrons From Euclidean FiniteVolume Correlation Functions, Raúl A. Briceño, Zohreh Davoudi, Maxwell T. Hansen, Matthias R. Schindler, Alessandro Baroni
Physics Faculty Publications
A relation is presented between singlehadron longrange matrix elements defined in a finite Euclidean spacetime and the corresponding infinitevolume Minkowski amplitudes. This relation is valid in the kinematic region where any number of twohadron states can simultaneously go on shell, so that the effects of strongly coupled intermediate channels are included. These channels can consist of nonidentical particles with arbitrary intrinsic spins. The result accommodates general Lorentz structures as well as nonzero momentum transfer for the two external currents inserted between the singlehadron states. The formalism, therefore, generalizes the work by Christ et al. [Phys. Rev. D 91, 114510 (2015 ...
NonTropical Cyclone Related Winter Heavy Rainfall Events Over The Philippines: Climatology And Mechanisms, Lyndon Mark Olaguera, Jun Matsumoto, Julie Mae Dado, Gemma T. Narisma
NonTropical Cyclone Related Winter Heavy Rainfall Events Over The Philippines: Climatology And Mechanisms, Lyndon Mark Olaguera, Jun Matsumoto, Julie Mae Dado, Gemma T. Narisma
Physics Faculty Publications
This study investigates nontropical cyclone (TC) related boreal winter heavy rainfall events that lead to extensive flooding (HRF) over the Philippines through a case study and composite analysis. The HRF event examined occurred during January 16– 22, 2017 over Cagayan de Oro City (CDO) in Mindanao Island (122–127°E, 5–10°N). The accumulated rainfall over CDO reached by about 180 mm from 00 UTC January 16 to 00 UTC January 17, 2017, exceeding the climatological maximum daily rainfall in January over this area. The interaction of a westward propagating cyclonic circulation over Mindanao Island (MCC) and a shearline ...
Parton Distribution Functions From Loffe Time PseudoDistributions, Bálint Joó, Joseph Karpie, Kostas Orginos, Anatoly V. Radyushkin, David Richards, Savvas Zafeiropoulos
Parton Distribution Functions From Loffe Time PseudoDistributions, Bálint Joó, Joseph Karpie, Kostas Orginos, Anatoly V. Radyushkin, David Richards, Savvas Zafeiropoulos
Physics Faculty Publications
In this paper, we present a detailed study of the unpolarized nucleon parton distribution function (PDF) employing the approach of parton pseudodistribution functions. We perform a systematic analysis using three lattice ensembles at two volumes, with lattice spacings a = 0.127 fm and a = 0.094 fm, for a pion mass of roughly 400 MeV. With two lattice spacings and two volumes, both continuum limit and infinite volume extrapolation systematic errors of the PDF are considered. In addition to the x dependence of the PDF, we compute their first two moments and compare them with the pertinent phenomenological determinations.
Generalized Parton Distributions And Pseudodistributions, Anatoly V. Radyushkin
Generalized Parton Distributions And Pseudodistributions, Anatoly V. Radyushkin
Physics Faculty Publications
We derive oneloop matching relations for the Ioffetime distributions (ITDs) related to the pion distribution amplitude (DA) and generalized parton distributions (GPDs). They are obtained from a universal expression for the oneloop correction in an operator form, and will be used in the ongoing lattice calculations of the pion DA and GPDs within the parton pseudodistributions approach.
Consistency Checks For TwoBody FiniteVolume Matrix Elements: Conserved Currents And Bound States, Raúl A. Briceño, Maxwell T. Hansen, Andrew W. Jackura
Consistency Checks For TwoBody FiniteVolume Matrix Elements: Conserved Currents And Bound States, Raúl A. Briceño, Maxwell T. Hansen, Andrew W. Jackura
Physics Faculty Publications
Recently, a framework has been developed to study form factors of twohadron states probed by an external current. The method is based on relating finitevolume matrix elements, computed using numerical lattice QCD, to the corresponding infinitevolume observables. As the formalism is complicated, it is important to provide nontrivial checks on the final results and also to explore limiting cases in which more straightforward predictions may be extracted. In this work we provide examples on both fronts. First, we show that, in the case of a conserved vector current, the formalism ensures that the finitevolume matrix element of the conserved charge ...
Question 1: Electric Cars; Question 2: Chicken Poop, Larry Weinstein
Question 1: Electric Cars; Question 2: Chicken Poop, Larry Weinstein
Physics Faculty Publications
How much more electrical energy will the United States need to generate if everyone drives electric cars? How much chicken excrement is produced in the United States every year?. [Extracted from the article]
Solutions For Fermi Questions, December 2019: Question 1: Electric Cars; Question 2: Chicken Poop, Larry Weinstein
Solutions For Fermi Questions, December 2019: Question 1: Electric Cars; Question 2: Chicken Poop, Larry Weinstein
Physics Faculty Publications
How much more electrical energy will the United States need to generate if everyone drives electric cars? B I Answer: i b If we all switch from gasolinefueled to electricityfueled cars, then we will need to generate more electrical energy. Thus, if we replace all of our gasolinefueled cars with electricityfueled cars, we will need to generate about 30% more electrical energy. [Extracted from the article]
Beam Asymmetry Σ For The Photoproduction Of Η And Ή Mesons At Eγ = 8.8gev, S. Adhikari, A. Ali, M. J. Amaryan, A. Austregesilo, F. Barbosa, J. Barlow, A. Barnes, E. Barriga, R. Barsotti, T. D. Beattie, V. V. Berdnikov, T. Black, N. Wickramaarachchi, B. Zihlmann, The Gluex Collaboration
Beam Asymmetry Σ For The Photoproduction Of Η And Ή Mesons At Eγ = 8.8gev, S. Adhikari, A. Ali, M. J. Amaryan, A. Austregesilo, F. Barbosa, J. Barlow, A. Barnes, E. Barriga, R. Barsotti, T. D. Beattie, V. V. Berdnikov, T. Black, N. Wickramaarachchi, B. Zihlmann, The Gluex Collaboration
Physics Faculty Publications
We report on the measurement of the beam asymmetry Σ for the reactions →γp→pη and →γp→pη′ from the GlueX experiment using an 8.2–8.8GeV linearly polarized tagged photon beam incident on a liquid hydrogen target in Hall D at Jefferson Laboratory. These measurements are made as a function of momentum transfer −t with significantly higher statistical precision than our earlier η measurements and are the first measurements of η′ in this energy range. We compare the results to theoretical predictions based on tchannel quasiparticle exchange. We also compare the ratio of Σ_{η} to Σ_{η ...}
Pion Valence Structure From IoffeTime Parton Pseudodistribution Functions, Bálint Joó, Joseph Karpie, Kostas Orinos, Anatoly V. Radyushkin, David G. Richards, Raza Sabbir Sufian, Savvas Zafeiropoulos
Pion Valence Structure From IoffeTime Parton Pseudodistribution Functions, Bálint Joó, Joseph Karpie, Kostas Orinos, Anatoly V. Radyushkin, David G. Richards, Raza Sabbir Sufian, Savvas Zafeiropoulos
Physics Faculty Publications
We present a calculation of the pion valence quark distribution extracted using the formalism of reduced Ioffetime pseudodistributions or more commonly known as pseudoPDFs. Our calculation is carried out on two different 2 + 1 flavor QCD ensembles using the isotropicclover fermion action, with lattice dimensions 24^{3} × 64 and 32^{3} × 96 at the lattice spacing of a = 0.127 fm, and with the quark mass equivalent to a pion mass of m_{π} ≃ 415 MeV. We incorporate several combinations of smearedpoint and smearedsmeared pion sourcesink interpolation fields in obtaining the lattice QCD matrix elements using the summation method. After ...
Secondary Infall In The Seyfert's Sextet: A Plausible Way Out Of The Short Crossing Time Paradox, Omar LópezCruz, Héctor Javier IbarraMedel, Sebastián F. Sánchez, Mark Birkinshaw, Christopher Añorve, Jorge K. BarreraBallesteros, Jesús FalconBarroso, Wayne A. Barkhouse, Juan P. TorresPapaqui
Secondary Infall In The Seyfert's Sextet: A Plausible Way Out Of The Short Crossing Time Paradox, Omar LópezCruz, Héctor Javier IbarraMedel, Sebastián F. Sánchez, Mark Birkinshaw, Christopher Añorve, Jorge K. BarreraBallesteros, Jesús FalconBarroso, Wayne A. Barkhouse, Juan P. TorresPapaqui
Physics Faculty Publications
We used integral field spectroscopy from CALIFA DR3 and multiwavelength publicly available data to investigate the star formation histories of galaxies in the Seyfert's Sextet (SS; HCG 79). The galaxies H79a, H79b, H79c, and H79f have low star formation rates despite showing strong signs of interaction. By exploring their individual specific star formation histories, we identified three earlier episodes of strong star formation common to these four galaxies. We use the last two episodes as markers of the epochs when the galaxies were crossing. We suggest that after the first turnaround, initially gasrich galaxies crossed for the first time ...
Measurement Of The Cross Sections For Inclusive Electron Scattering In The E1214012 Experiment At Jefferson Lab, M. Murphy, H. Dai, D. Abrams, A. M. Ankowski, B. Aljawrneh, S. Alsalmi, J. Bane, S. Barcus, O. Benhar, V. Bellini, J. Bericic, D. Biswas, A. Camsonne, J. Castellanos, J.P. Chen, M. E. Christy, K. Craycraft, R. CruzTorres, D. Day, S.C. Dusa, E. Fuchey, T. Gautam, C. Giusti, J. Gomez, C. Gu, T. Hague, J.O. Hanson, F. Hauenstein, D. W. Higinbotham, C. E. Hyde, C. M. Jen, C. Keppel, S. Li, R. Lindgren, H. Liu, C. Mariani, R. E. Mcclellan, D. Meekins, R. Michaels, M. Mihovilovic, D. Nguyen, M. Nycz, L. Ou, B. Pandey, V. Pandey, K. Park, G. Perera, A. J. R. Puckett, S. N. Santiesteban, S. Širca, T. Su, L. Tang, Y. Tian, N. Ton, B. Wojtsekhowski, S. Wood, Z. Ye, J. Zhang, The Jefferson Lab Hall A Collaboration
Measurement Of The Cross Sections For Inclusive Electron Scattering In The E1214012 Experiment At Jefferson Lab, M. Murphy, H. Dai, D. Abrams, A. M. Ankowski, B. Aljawrneh, S. Alsalmi, J. Bane, S. Barcus, O. Benhar, V. Bellini, J. Bericic, D. Biswas, A. Camsonne, J. Castellanos, J.P. Chen, M. E. Christy, K. Craycraft, R. CruzTorres, D. Day, S.C. Dusa, E. Fuchey, T. Gautam, C. Giusti, J. Gomez, C. Gu, T. Hague, J.O. Hanson, F. Hauenstein, D. W. Higinbotham, C. E. Hyde, C. M. Jen, C. Keppel, S. Li, R. Lindgren, H. Liu, C. Mariani, R. E. Mcclellan, D. Meekins, R. Michaels, M. Mihovilovic, D. Nguyen, M. Nycz, L. Ou, B. Pandey, V. Pandey, K. Park, G. Perera, A. J. R. Puckett, S. N. Santiesteban, S. Širca, T. Su, L. Tang, Y. Tian, N. Ton, B. Wojtsekhowski, S. Wood, Z. Ye, J. Zhang, The Jefferson Lab Hall A Collaboration
Physics Faculty Publications
The E1214012 experiment performed at Jefferson Lab Hall A has collected inclusive electronscattering data for different targets at the kinematics corresponding to beam energy 2.222 GeV and scattering angle 15.54°. Here we present a comprehensive analysis of the collected data and compare the doubledifferential cross sections for inclusive scattering of electrons, extracted using solid targets (aluminum, carbon, and titanium) and a closed argongas cell. The data extend over broad range of energy transfer, where quasielastic interaction, Δresonance excitation, and inelastic scattering yield contributions to the cross section. The doubledifferential cross sections are reported with high precision (∼3%) for ...
Collinear Factorization In WideAngle Hadron Pair Production In E + E − Annihilation, E. Moffat, T. C. Rogers, N. Sato, A. Signori
Collinear Factorization In WideAngle Hadron Pair Production In E + E − Annihilation, E. Moffat, T. C. Rogers, N. Sato, A. Signori
Physics Faculty Publications
We compute the inclusive unpolarized dihadron production cross section in the far from backtoback region of e+ e− annihilation in leading order pQCD using existing fragmentation function fits and standard collinear factorization, focusing on the large transverse momentum region where transverse momentum is comparable to the hard scale (the centerofmass energy). We compare with standard transversemomentumdependent (TMD) fragmentation functionbased predictions intended for the small transverse momentum region with the aim of testing the expectation that the two types of calculation roughly coincide at intermediate transverse momentum. We find significant tension, within the intermediate transverse momentum region, between calculations done with ...
Validating The Water Vapor Variance Similarity Relationship In The Interfacial Layer Using Observations And LargeEddy Simulations, M. K. Osman, D. D. Turner, Thijs Heus, V. Wulfmeyer
Validating The Water Vapor Variance Similarity Relationship In The Interfacial Layer Using Observations And LargeEddy Simulations, M. K. Osman, D. D. Turner, Thijs Heus, V. Wulfmeyer
Physics Faculty Publications
In previous work, the similarity relationship for the water vapor variance in the interfacial layer (IL) at the top of the convective boundary layer (CBL) was proposed to be proportional to the convective velocity scale and the gradients of the water vapor mixing ratio and the Brunt‐Vaisala frequency in the entrainment zone. In the presence of wind shear in the IL, the similarity relationship was hypothesized to also include a dependence on the gradient Richardson number. Simultaneous measurements of the surface buoyancy flux, wind‐shear profiles from a radar wind profiler, water vapor mixing ratio and temperature measurements and ...
Complete Matching For Quasidistribution Functions In Large Momentum Effective Theory, Wei Wang, JianHui Zhang, Shuai Zhao, Ruilin Zhu
Complete Matching For Quasidistribution Functions In Large Momentum Effective Theory, Wei Wang, JianHui Zhang, Shuai Zhao, Ruilin Zhu
Physics Faculty Publications
We complete the procedure of extracting parton distribution functions (PDFs) using large momentum effective theory at leading power accuracy in the hadron momentum. We derive a general factorization formula for the quasiPDFs in the presence of mixing and give the corresponding hard matching kernel at O(α_{s}), both for the unpolarized and for the polarized quark and gluon quasiPDFs. Our calculation is performed in a regularizationindependent momentum subtraction scheme. The results allow us to match the nonperturbatively renormalized quasiPDFs to normal PDFs in the presence of mixing and therefore can be used to extract flavorsinglet quark PDFs as well ...
Numerical Exploration Of Three Relativistic Particles In A Finite Volume Including TwoParticle Resonances And Bound States, Fernando RomeroLópez, Stephen R. Sharpe, Tyler D. Blanton, Raúl A. Briceño, Maxwell T. Hansen
Numerical Exploration Of Three Relativistic Particles In A Finite Volume Including TwoParticle Resonances And Bound States, Fernando RomeroLópez, Stephen R. Sharpe, Tyler D. Blanton, Raúl A. Briceño, Maxwell T. Hansen
Physics Faculty Publications
In this work, we use an extension of the quantization condition, given in ref. [1], to numerically explore the finitevolume spectrum of three relativistic particles, in the case that twoparticle subsets are either resonant or bound. The original form of the relativistic threeparticle quantization condition was derived under a technical assumption on the twoparticle K matrix that required the absence of twoparticle bound states or narrow twoparticle resonances. Here we describe how this restriction can be lifted in a simple way using the freedom in the definition of the Kmatrixlike quantity that enters the quantization condition. With this in hand ...
Comparing Proton Momentum Distributions In A = 2 And 3 Nuclei Via ^{2}H ^{3}H And ^{3}He (E,E′P) Measurements, R. CruzTorres, F. Hauenstein, A. Schmidt, D. Nguyen, D. Abrams, H. Albataineh, S. Alsalmi, D. Androic, K. Aniol, W. Armstrong, J. Arrington, H. Atac, D. Bulumulla, C. E. Hyde, V. Khachatryan, M. N.H. Rashad, L. B. Weinstein, Z. Y. Ye, J. Zhang, Jefferson Lab Hall A Tritium Collaboration
Comparing Proton Momentum Distributions In A = 2 And 3 Nuclei Via 2H 3H And 3He (E,E′P) Measurements, R. CruzTorres, F. Hauenstein, A. Schmidt, D. Nguyen, D. Abrams, H. Albataineh, S. Alsalmi, D. Androic, K. Aniol, W. Armstrong, J. Arrington, H. Atac, D. Bulumulla, C. E. Hyde, V. Khachatryan, M. N.H. Rashad, L. B. Weinstein, Z. Y. Ye, J. Zhang, Jefferson Lab Hall A Tritium Collaboration
Physics Faculty Publications
We report the first measurement of the (e, e' p) reaction crosssection ratios for Helium3 (^{3}He), Tritium (^{3}H), and Deuterium (d). The measurement covered a missing momentum range of 40 ≤ p_{miss} ≤ 550 MeV/c, at large momentum transfer ({Q^{2}} ≈ 1.9 (GeV/c)^{2}) and x_{B} > 1, which minimized contributions from non quasielastic (QE) reaction mechanisms. The data is compared with planewave impulse approximation (PWIA) calculations using realistic spectral functions and momentum distributions. The measured and PWIAcalculated crosssection ratios for ^{3}He/d and ^{3}H/d extend to just above the typical nucleon Fermimomentum ...
Nuclear Theory And Event Generators For ChargeChanging Neutrino Reactions, J. W. Van Orden, T. W. Donnelly
Nuclear Theory And Event Generators For ChargeChanging Neutrino Reactions, J. W. Van Orden, T. W. Donnelly
Physics Faculty Publications
Semiinclusive CCν cross sections based on factorized cross sections are studied for a selection of spectral function models with the objective of facilitating the choice of models for use as input into event generators. The basic formalism for such cross sections is presented along with an introduction to constructing spectral functions for simple models based on the independentparticle shell model, the relativistic Fermi gas model (RFG), and a local density approximation (LDA) based on the RFG. Spectral functions for these models are shown for 16O along with a more sophisticated model which includes nucleonnucleon interactions [AlvarezRuso et al., Prog ...
Laser Irradiation Of Mung Bean (Vigna Radiata L.) At Two Wavelengths For Enhanced Seedling Development, Rayno Vic B. Janayon, Raphael A. Guerrero
Laser Irradiation Of Mung Bean (Vigna Radiata L.) At Two Wavelengths For Enhanced Seedling Development, Rayno Vic B. Janayon, Raphael A. Guerrero
Physics Faculty Publications
Two laser sources operating at wavelengths of 632.8 nm (HeNe) and 488 nm (Ar+
) are used in examining the effects of coherent, lowpower, continuous wave exposure on the development of Vigna radiata L. Presowing laser irradiation of seeds leads to an improvement of mung bean seedling characteristics, with increased values of hypocotyl length (an increase of up to 22.5%), root length (an increase of up to 28.8%), and seedling mass (a maximum increase of 29.2%). Measured parameters between seedlings from laserirradiated seeds and from control samples are statistically different at a level of significance equal to ...
Muon Capture In Nuclei: An Ab Initio Approach Based On Green's Function Monte Carlo Methods, A. Lovato, N. Rocco, Rocco Schiavilla
Muon Capture In Nuclei: An Ab Initio Approach Based On Green's Function Monte Carlo Methods, A. Lovato, N. Rocco, Rocco Schiavilla
Physics Faculty Publications
An ab initio Green’s function Monte Carlo (GFMC) method is introduced for calculating total rates of muon weak capture in light nuclei with mass number A ≤ 12. As a first application of the method, we perform a calculation of the rate in ^{3}H and ^{4}He in a dynamical framework based on realistic two and threenucleon interactions and realistic nuclear chargechanging weak currents. The currents include one and twobody terms induced by πand ρmeson exchange, and NtoΔ excitation, and are constrained to reproduce the empirical value of the GamowTeller matrix element in tritium. We investigate the sensitivity of ...
Unitarity Of The InfiniteVolume ThreeParticle Scattering Amplitude Arising From A FiniteVolume Formalism, Raúl A. Briceño, Maxwell T. Hansen, Stephen R. Sharpe, Adam P. Szczepaniak
Unitarity Of The InfiniteVolume ThreeParticle Scattering Amplitude Arising From A FiniteVolume Formalism, Raúl A. Briceño, Maxwell T. Hansen, Stephen R. Sharpe, Adam P. Szczepaniak
Physics Faculty Publications
Hansen and Sharpe [Phys. Rev. D 92, 114509 (2015)] derived a relation between the scattering amplitude of three identical bosons,M_{3}, and a real function referred to as the divergencefree K matrix and denoted K_{df;3}. The result arose in the context of a relation between finitevolume energies and K_{df;3}, derived to all orders in the perturbative expansion of a generic lowenergy effective field theory. In this work we set aside the role of the finite volume and focus on the infinitevolume relation between K_{df;3} and M_{3}. We show that, for any real ...
Factorization Of Jet Cross Sections In HeavyIon Collisions, JianWei Qiu, Felix Ringer, Nobuo Sato, Pia Zurita
Factorization Of Jet Cross Sections In HeavyIon Collisions, JianWei Qiu, Felix Ringer, Nobuo Sato, Pia Zurita
Physics Faculty Publications
We propose a new phenomenological approach to establish QCD factorization of jet cross sections in the heavyion environment. Starting from a factorization formalism in protonproton collisions, we introduce medium modified jet functions to capture the leading interaction of jets with the hot and dense QCD medium. A global analysis using a Monte Carlo sampling approach is performed in order to reliably determine the new jet functions from the nuclear modification factor of inclusive jets at the LHC. We find that gluon jets are significantly more suppressed due to the presence of the medium than quark jets. In addition, we observe ...
SiliceneLike Domains On Irsi3 Crystallites, Dylan Nicholls, Fnu Fatima, Deniz Cakir, Nuri Oncel
SiliceneLike Domains On Irsi3 Crystallites, Dylan Nicholls, Fnu Fatima, Deniz Cakir, Nuri Oncel
Physics Faculty Publications
Recently, silicene, the graphene equivalent of silicon, has attracted a lot of attention due to its compatibility with Sibased electronics. So far, silicene has been epitaxy grown on various crystalline surfaces such as Ag(110), Ag(111), Ir(111), ZrB2(0001) and Au(110) substrates. Here, we present a new method to grow silicene via high temperature surface reconstruction of hexagonal IrSi3 nanocrystals. The hIrSi3 nanocrystals are formed by annealing thin Ir layers on Si(111) surface. A detailed analysis of the STM images shows the formation of silicene like domains on the surface of some of the IrSi3 crystallites ...
ExchangeCoupling Behavior In Srfe12o19/La0.7sr0.3mno3 Nanocomposites, Jiba Nath Dahal, Dipesh Neupane, Sanjay R. Mishra
ExchangeCoupling Behavior In Srfe12o19/La0.7sr0.3mno3 Nanocomposites, Jiba Nath Dahal, Dipesh Neupane, Sanjay R. Mishra
Physics Faculty Publications
Magnetically hardsoft (100x) SrFe12O19–x wt % La0.7Sr0.3MnO3 nanocomposites were synthesized via a onepot autocombustion technique using nitrate salts followed by heat treatment in air at 950 °C. Xray diffraction (XRD), transmission electron microscopy (TEM), and vibrating sample magnetometry (VSM) were used to characterize the structural and magnetic properties of the samples. XRD spectra revealed the formation of a mixture of ferrite and magnetite phases without any trace of secondary phases in the composite. Microstructural images show the proximity grain growth of both phases. The room temperature hysteresis loops of the samples showed the presence of exchangecoupling between the ...
Question 1: I'M Stoked!; Question 2: Geckos, Larry Weinstein
Question 1: I'M Stoked!; Question 2: Geckos, Larry Weinstein
Physics Faculty Publications
A quiz is presented about the maximum power of steam engines and the number of geckos needed to apply enough force to lift a typical glass window pane.