Adhikari, Shankar. FL International. Statement of Misak Sargsian. Shankar Adhikari is a theory
graduate student who will attend GRC and present a poster on theoretical studies of nonnucleonic component in the deuteron. He will present new results on calculating Delta-Delta
component in the high momentum component of the deuteron wave function. This research will
provide an essential theory support in current JLab efforts to observe such component in the
high energy deuteron electro-disintegration processes.
Adikaram, Dasuni. Old Dominion. Statement of Lawrence Weinstein. Dasuni Adikaram will
present a contributed talk at the April APS meeting on the CLAS Two Photon Exchange (TPE)
experiment. She recently defended her PhD thesis and will be presenting almost final results.
This is a very high-profile measurement with two competing experiments.
Ahmad, Mahmoud. Old Dominion. Statement of Geoffrey Krafft. Mahmoud Ahmad has been
working on (and will be reporting on) an instrument that measures the bunch length of the
electron beam coming out of the CEBAF injector. The final compression on injection gets set by
properly adjusting the M56 transfer matrix element, and having the compression correctly
adjusted has direct influence on experiment beam backgrounds and on the energy spread within
the beam itself. Smaller energy spread is desirable for suppressing polarization dilution in the
beam delivered to experiments. With travel funds to attend the USPAS, he will be learning
numerical techniques for analyzing the results of measurements.
Allada, Kalyan. MIT. Statement of Shalev Gilad. Kalyan Alleda is going to present an invited talk
at the Spin 2014 conference on the topic of "Key future measurements of Transverse Momentum
Distributions (TMDs). This work is related to Kalyan Allada's Ph.D. research and dissertation. He
will present an overview of future measurements of TMDs in both semi-inclusive DIS reactions
and Drell-Yan process, with a focus on Hall A SoLID program on measuring TMDs.
Badui, Rafael. FIU. Statement of Lei Guo. Rafael Badui is presenting a poster at the Gordon
Conference, showing his results of beam helicity asymmetry of two pseudoscarlar meson
photoproduction using the g12 data set. His results include first time measurement from three
reactions, including pK+K-, ppi+pi-, and X-K+K+ final states.
Cao, Tongtong. South Carolina. Statement of Yordanka Ilieva: Tongtong Cao is an advanced
graduate student in my group. His dissertation is on the experimental determination of two
double-polarization observables (Cx and Cz) for final-state interactions (FSI) in KLambda
photoproduction off the deuteron (data from JLab E06-103 experiment). The observables will be
used to constrain uncertain parameters of hyperon-nucleon potentials and extract the Lambdaneutron scattering length. The topic is of significant interest in the nuclear-physics community,
since hyperon-nucleon potentials enter in the equation of state of neutron stars and in
calculations of hypernuclear matter. Accessing the Lambda-n interaction in the FSI of
photoproduction off the deuteron by using large set of polarization observables is a unique study
and E06-103 is the only existing experiment that allows to carry it out. Tongtong has done a
tremendous amount of excellent work on the data analysis and implemented original methods for
extraction of the observables. His study is in advanced stage and his preliminary results are
ready to be presented in contributed talks at conferences. At the April meeting Tongton will give
an oral presentation. This opportunity is not only important for communicating his research to the
physics community, but also for his scientific career. Tongtong will graduate in Spring 2016 and
this year is critical for him to give talks at larger conferences.
Castilla, Alejandro. Old Dominion. Statement of Jean Delayen: Alejandro Castilla is a fourth
year grad student at ODU. He is working on the design and development of the crabbing system
for the Medium Energy Electron-Ion Collider project at Jefferson Lab in a collaboration between
ODU and the CASA group. The reason for his attending the APS April meeting in Savannah,
Georgia is that Alejandro will be presenting a talk on the testing and characterization of the proof
of principles Nb 750 MHz crab cavity designed as part of his research work and built by Niowave,
Inc. under the DOE STTR program in collaboration of ODU with both CASA and the cavity groups
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at the Jefferson Lab. An efficient crabbing system is crucial for the MEIC in achieving the
luminosity specifications required by the Nuclear Physics Program on their quest of further
understanding of the matter. Alejandro's work span covers computational simulations for
radiofrequency structure design, superconductivity, experimental aspects of microwaves and
cavity testing, beam dynamics and particle tracking.
Celentano, Andrea. INFN-Genova. Statement of Marco Battaglieri: MeV-GeV dark matter (DM)
is theoretically well motivated but remarkably unexplored. The “Beam Dump eXperiment” (BDX)
at Jefferson Laboratory aims to search for low-mass dark matter, trough the scattering on a
segmented plastic scintillator detector placed downstream of the beam-dump at one of the high
22
intensity JLab experimental Halls, receiving up to 10 electrons-on-target (EOT) in a one-year
period. For these experimental conditions, BDX is sensitive to the DM-nucleon elastic scattering
at the level of a thousand counts per year, and is only limited by cosmogenic backgrounds. The
experiment is also sensitive to DM-electron elastic and inelastic scattering, at the level of 10
counts/year. The foreseen signal for this channel is an high-energy (> 100 MeV) electromagnetic
shower, with almost no background. The experiment, currently being designed, has been
presented in form of a Letter of Intent to the laboratory, receiving positive feedback. This
encouraged the preparation of a full proposal, to be submitted to the next year PAC. In the talk,
after briefly discussing the motivations for low-mass dark matter existence, we will describe the
experimental setup, and show the foreseen experimental sensitivity for the two aforementioned
channels, obtained trough Monte Carlo simulations.
Celentano, Andrea. INFN-Genova. Statement of Marco Battaglieri: Andrea will present an
update on the analysis of the decay process w → 3 pi employing an extended Veneziano model.
Data were obtained by measuring the reaction gamma p → p pi+ pipi0 with the CLAS detector in
Hall-B at Jefferson Laboratory. The workshop will be a very good occasion to show these results
to the international experts there present, and to trigger a fruitful discussion.
Compton, Nicholas. Ohio. Statement of Ken Hicks: Nick will present his cross sections for K0
Lambda photoproduction from the neutron. This is the first time that these results will be shown
publicly. These data are important for the understanding of neutron resonances, which may have
different photo-couplings than for proton resonances.
Compton, Nicholas. Ohio. Statement of Ken Hicks: This request is to attend the CLAS12
European Collaboration Meeting, which will be held in Catania, Sicily, Italy on February 17-20,
2015. Nick will be representing the Ohio University group. Nick will present a talk on his analysis
of the K0 Lambda photoproduction from the neutron, which has passed analysis review and is
about to start Ad Hoc review.
Cummings, Melissa. William & Mary. Statement of Todd Averett: Melissa Cummings will attend
the SPIN 2014 conference to present new results on her thesis experiment, A Measurement of
g2p at Low Q2. The collaboration expects to have preliminary results to show. This conference is
the appropriate venue for these results because they are the first measurements of this
fundamental structure function in the resonance region. Results will be used to test the BurkhardtCottingham sum rule and chiral perturbation theory calculations of nucleon polarizabilities.
Dai, Lingyun. Indiana U. Statement of Adam Szczepaniak: Lingyun is a postdoc of Indiana
University, partly working on JLab physics and requests travel support to attend the Future
Directions in Spectroscopy Analysis workshop at JLab in November at which Lingyuan will make
a presentation.
Fegan, Stuart. INFN. Statement of Marco Battaglieri: The MESON2014 workshop aims to
establish closer contact between experimentalists and theorists studying meson production,
properties and interactions. The program and themes of the workshop offer a good match to my
current involvement in the MesonEx experiment at JLab and an ideal opportunity to showcase the
work of the collaboration to the wider hadron physics community.
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Freese, Adam. Florida International. Statement of Misak Sargsian. Adam Freese is a theory
graduate student who will attend GRC and present a poster on theoretical studies of EMC effects
at JLab 6/12 GeV and EIC energies. New calculations will be presented which systematically take
into account the short range correlations effects in partonic distribution modification in the nuclear
medium.
Garillon, Brice. IPN Orsay. Statement of Silvia Niccolai. Brice Garillon will attend the CLAS12
4th European workshop where he will present the near-to-final results of his PhD thesis analysis
on electroproduction of the f0 and f2 mesons measured with the CLAS detector. Brice is a third
year PhD student who has made remarkable progress since beginning his thesis, and has
reached a very good level of maturity, physics knowledge as well as familiarity and expertise with
the data analysis tools. Presenting his results in this international workshop can help him get
feedback to improve and conclude his thesis work and at the same time provide him with the
exposure he needs to find a job to pursue a career in research.
Hattawy, Mohammad. Université Paris-Sud / Institut de Physique Nucléaire d'Orsay.
Statement of Michel Guidal & Raphaël Dupré. Misak Sargsian. Mohammad has been working on
calibration and analysis of the eg6 run of CLAS for 2-1/2 years. He has now preliminary results
for the coherent and incoherent deep virtual Compton scattering off 4He. Our experiment is the
first to specifically measure these channels, making the results highly original. Mohammad will
give a contributed talk at the conference and present these results at the QNP conference for the
first time.
Jakura, Andrew. Indiana University. Statement of Adam Szczepaniak. Andrew’s PhD work will
focus on hadron spectroscopy and reaction mechanisms. Attending the Future Directions in
Spectroscopy Analysis workshop at JLab in November directly impacts his future research and
would start his professional development in the field. Experts in reaction theory and analysis
would introduce him to the current research and applications in hadron spectroscopy.
Participation at the workshop will enable him ability to meet people that he will be collaborating
with in the future.
Ma, Lingling. UNC-Wilmington. Statement of Liping Gan: A poster presentation on the status of
PrimEx-II will be presented.
Magee, Joshua. William & Mary. Statement of David Armstrong: Josh Magee has been invited
to present a talk on Qweak at the Quark Confinement and the Hadron Spectrum Conference this
September in St Petersburg, Russia. Josh is an advanced PhD student. He started graduate
studies here at William & Mary in the Fall of 2008 and his thesis project is Qweak. The
collaboration received a request to give an invited talk at this meeting, and the collaboration Talks
Coordinator and Institutional Council selected Josh for this talk. Josh gives excellent talks, and
will represent the collaboration well. This will be his first invited talk, and his first chance to attend
an international conference.
Mkrtchyan, Arthur. Catholic U. Statement of Tanja Horn: This request is for partial travel
support from JSA for my postdoc Arthur Mkrtchyan to give an oral presentation at the APS 2015
meeting. Arthur is a young scientist working on the analysis of 6 GeV Timelike Compton
Scattering (TCS) data and the design of a new 12 GeV TCS experiment with a transverse target.
Arthur has an excellent background in hardware development. Currently he is working on two
hardware projects needed to carry out CUA's physics program at JLab, the kaon aerogel
Cerenkov detector to be installed this summer and the Neutral Particle Spectrometer project. The
latter is of great interest for Arthur's studies of a new 12 GeV TCS experiment. Arthur's
presentation at the APS 2015 will focus on TCS results from 6 GeV data and opportunities for
studies of TCS at 12 GeV including his studies for developing an experiment with transverse
target. Giving him an opportunity to present his results at the APS 2015 meeting would allow him
to further his skills in communicating scientific results to a scientific audience.
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Moore, Michael. Old Dominion. Statement of Silviu Covrig: I would like to request travel funds
for Michael Moore, a senior grad student from ODU to present a poster at the April 2014 APS
Meeting in Savannah, GA. Michael has been instrumental in finding solutions to a critical
problem: the SHMS steering of the primary electron beam in Hall C. The SHMS smallest angle
was designed to be 5 degrees, but due to the steering of the primary beam the spectromer would
only work above 9 degrees as built. Michael has generated for the first time the full 3D SHMS
optics system by modeling it with OPERA/TOSCA. He is in the process of finding a solution that
will allow the spectrometer to work at 5 degrees over the full range of energies. He is preparing a
scientific paper to be submitted to NIM based on his findings. He would like to present the status
of his work at the APS-April 2014 meeting.
Moriya, Kei. Arizona State. Statement of Barry Ritchie: Kei Moriya has been invited to the
workshop to present results on CLAS photoproduction experiments. The organizers have asked
for results regarding eta, omega, phi, and Lambda(1405) production. All of these results have
been published, and are of interest to the broad community working on hadronic resonances. The
Lambda(1405) in particular was Kei's thesis topic, and has garnered attention from theorists as a
state that may be "dynamically generated". The workshop provides a chance for Kei to be
exposed to the broader community and present high-precision results from Jefferson Lab.
Narayan, Amrendra. Mississippi State. Statement of Dipangkar Dutta: I am requesting travel
support for Amrendra Narayan who is a senior grad student working on the Qweak experiment.
Amrendra was instrumental in developing the FPGA based DAQ system for the electron detector
used in the Hall-C Compton polarimeter, which was used during the Qweak experiment. He has
been analyzing the Compton data and simulating the whole polarimeter as well as the DAQ
system in order and is well on the way to achieving the sub 1% systematic uncertainty desired by
the Qweak experiment. He will present a talk on his latest simulation and on his efforts to
rigorously demonstrate the sub 1% systematic uncertainty of the electron detector.
Peng, Peng. UVa. Statement of Blaine Norum. Peng has been a research student of mine
working on preparations for, execution of, and interpretation of the results from the G14 CLAS
run. He made considerable contributions to the development of the HD target working in A,
Sandorfi's group. Since the run, he has worked on various aspects of the analysis of this
pioneering experiment. One of his main efforts has been in the analysis of the NMR
measurements of the target polarization, a challenging undertaking given the novelty of the
target. He has also made excellent progress in analyzing the two-pion channel (which he plans to
present at the conference). In short, he has done an excellent job and will represent the lab with
distinction.
Phelps, Will. FIU. Statement of Lei Guo. Will Phelps is presenting a poster at the Gordon
Conference, showing his results of antibaryon photoproduction using the g12 data set. His data
includes the highest statistics ever collected for antibaryon photoproduction, as well as the first
observation of antineutron in photoproduction. He will show preliminary data features, cross
sections and angular distributions.
Prather, Benjamin. Arizona State. Statement of Barry Ritchie: Ben Prather, a senior
undergraduate honors student with a 3.75 GPA at ASU, will present a poster on his simulation
studies of the feasibility of ηc photoproduction measurements with the GlueX detector, which will
be the subject of his honors' thesis at ASU. During his undergraduate work at ASU, he has
particpated in both cluster computing and supercomputing teams, which has helped in his
implementation of boosted decision trees for his simulation studies. Ben has been accepted by
several first-tier graduate schools, so the experience will help him build his profesional network as
a budding researcher.
Schott, Diane. George Washington. Statement of William Briscoe: Diane is a full time post doc
with my GWDAC group. She has been invited to speak at MESON2014 on a topic entitled CLAS
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Results on Meson Spectroscopy. As you can see this is very much related to not only her thesis
experiment, but also her service work to the CLAS Collaboration through the Hall B Partial Wave
Analysis Group, and her work in both the GW Data Analysis Center and the JLab Physics
Analysis Center. Diane has shown great leadership in these effort and deserves to be recognized
for these efforts by the awarding of a JSA Junior Scientist Travel Grant.
Sparks, Nathan. Catholic University. Statement of Franz Klein: My postdoc Nathan Sparks will
present a new kind of pre-amplifiers for PMTs in the Poster Session of the Nuclear Science
Symposium at the IEEE-NPSS Conference in Seattle, WA. Nathan has helped with the
development and characterization of this new kind of pre-amplifiers for PMTs that takes its
operating voltages from the HV inlet of the PMT. The pre-amp PCB with two independent output
channels was developed by Vladimir Popov (JLab) in collaboration with Alexander Somov (JLab)
and Franz Klein (CUA) to support high-rate operation of the Hall-D broadband tagging
hodoscope. The Hamamatsu 1” PMTs (R9800) are driven by a self-made divider PCB and the
anode signal is amplified on a (second) pre-amp PCB. The main advantages of this pre-amplifier
are its low current consumption and the absence of extra (low-voltage) cables connected to the
PMT-preamp unit. Nathan helped with optimizing the prototype, and he characterized almost all
PMT-preamp units for the tagging hodoscope from Dec. 2013 to April 2014 by extensive HV
scans and rate scans between 10kHz and 10MHz. During this summer he helped with installation
and on-site testing of the 218 counters in the Hall-D Tagger Hall.
Thorpe, Brianna. Arizona State. Statement of Barry Ritchie: Brianna Thorpe, a sophomore
undergraduate honors student at ASU, will present her poster on the triplet polarimeter to be used
in the Hall D beamline for measuring the photon beam polarization. The use of the triplet
production process (pair creation off atomic electrons) could allow for determination of
polarization with high precision. The newly-constructed polarimeter will be described, preliminary
results of the detector's response to alpha and electron sources will be presented, and estimates
of potential performance with the Jefferson Lab Hall D photon beam will be discussed. Brianna
has won ASU awards and support for her involvement with the ASU Meson Physics Group, has a
3.8 GPA, participated in an REU program last summer, leads an undergraduate student group
promoting the involvement of women in science (SUNRISE), and is involved in other outreach
activities.
Trivedi, Arjun. South Carolina. Statement of Ralf Gothe: Within the context of the N* program at
JLab and its overarching goal of probing the evolution of the Strong Interaction's degrees of
freedom, Arjun will introduce his analysis of the Charged Double-Pion Electroproduction data off
the proton (extended to high Q^2 and W) and his ongoing effort to extract cross-sections that will
be used to determine Electrocoupling observables. Given the breadth of the XXI DAE-BRNS High
Energy Physics Symposium, Arjun will begin his presentation with an overview of the N* program
and the CLAS detector. In presenting his latest results, Arjun will stress on his attempt to extract,
for the first time, beam helicity dependent Electrocoupling observables from Double ChargedPion production.
Tsai, Cheng-Ying. VA Tech. Statement of Mark Pitt: Based on his merit and qualification,
Cheng-Ying Tsai has been accepted by the United States Particle Accelerator School (USPAS),
with coverage of room and board. The only part not covered is the transportation costs. ChengYing is working on a Ph.D. thesis in accelerator physics under the direction of Rui Li at JLab. His
focus is on numerical and analytical studies of coherent synchrotron radiation induced instabilities
in beam transport. The topics covered by the USPAS are important to Cheng-Ying's Ph.D.
training, since usually universities do not offer a full range of accelerator physics courses and the
graduate students in the accelerator community rely heavily on courses taught by USPAS.
Cheng-Ying is also planning to participate in a frontier accelerator physics R&D experiment at
Fermilab late this summer, and the courses he will be take at USPAS are important for his
participation in this upcoming experiment.
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Wilson, David. Old Dominion. Statement of Jozef Dudek: We request support for attendance at
the 32nd International Symposium on Lattice Field Theory, in New York. We expect to present
recently obtained scattering results obtained by researchers in a collaboration between the
Theory Center at Jefferson Lab and ODU. We have computed the coupled system of K-pi and Keta scattering for the first time directly from QCD using lattice methods. A thorough analysis of the
S,P and D-wave scattering amplitudes shows the presence of an interesting set of resonances
which match well with the experimental K*0, K* and K*2 states. These calculations pave the way
for study of more sophisticated resonant systems such as the exotic mesons that will be searched
for in GlueX and CLAS12.
Zachariou, Nicholas. South Carolina. Statement of Yordanka Ilieva: Nick will be attending the
APS to describe our group's work and present preliminary results on studying the HyperonNucleon (YN) interaction. In this framework, the Hyperon-Nucleon interaction is studied by
selecting kinematics where final-state-interactions in the reaction γd -- >K+Λn are enhanced.
Preliminary results of the beam-spin asymmetry Σ, obtained using linearly polarized photon
beam, and of the polarization transfers Cx and Cz, obtained using a circularly polarized photon
beam, will be presented. Our approach to gain information on the YN interaction through a large
set of polarization observables for the Lambda-Neutron final-state interaction is different than the
hypernuclear studies and is unique not only due to the different sensitivity of the observables to
parameters of the hyperon-nucleon potential and the low-energy scattering length, but also since
there is no other existing data set allowing to conduct such a study. Nick's attendance at the
meeting will provide excellent exposure for our work and it will allow us to enhance collaborations
with theorists that aim in understanding the Hyperon-Nucleon interaction via hyperon production.
The latter is essential for the interpretation of our experimental results.
Zhang, Jixie. UVa. Statement of Donal Day: I would like to request travel funds for Jixie Zhang to
present a talk at the 2014 DNP fall meeting with the title Initial State Helicity Correlation in Wide
Angle Compton Scattering. The applicability of pQCD to exclusive reactions at medium energies
is a subject of considerable interest. Real Compton scattering (RCS) has the potential to provide
insight to this unsettled issue. The first ever measurement of the initial state helicity correlation,
ALL, in RCS has been proposed for Hall C. This proposal has garnered significant theoretical
support as it would help clarify our understanding of pQCD at intermediate energies and help us
scrutinize the GPD description of reactions induced by real photons. Jixie has done the lion’s
share of the work for the preparation of the proposal and is especially well qualified to
communicate the importance and relevance of this physics to the broad nuclear physics
community in attendance in Hawaii.
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