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WHAT IS SCHOLARWORKS?

ScholarWorks is Brandeis University’s portal for showcasing all types of
scholarship, expertise, and activities by our community of scholars. Consistent
with the University’s mission, we are united by our commitment to the pursuit of
knowledge and its transmission from generation to generation. ScholarWorks aids
in the transmission of knowledge by allowing the public to have a window into
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WRAPPING UP A SUMMER OF SCIENCE: SCIFEST 2023

After countless hours dedicated to summer research, undergraduate students
across the sciences shared their findings.

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SCIENTIFIC ORIGAMI: FOLDING DNA INTO DESIRED STRUCTURES

Rupam Saha, a fourth year physics PhD candidate, talks about his work designing
self-limited structures.

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LINKS


THE URGENCY OF ALZHEIMER’S RESEARCH

Elizabeth Mahon, a psychology PhD candidate, spent the summer in the Lifespan
Lab working to identify the precursors for Alzheimer's disease.

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AT THE INTERSECTION OF TASTE AND SMELL

Thomas Gray, a PhD candidate in neuroscience, shares insights into his research,
sources of inspiration, and experiences with mentorship.

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FEATURED RESEARCHERS


CHRISTINE GRIENBERGER

Assistant Professor of Biology

Christine Grienberger wins New Innovator Award, $1.5 million from NIH




LAURENCE SIMON

Professor

Leading scholars, esteemed leaders, and Brandeis community members joined
together to discuss law, caste, and the pursuit of justice during The 6th
International Conference on the Unfinished Legacy of Dr. B. R. Ambedkar, a
conference hosted October 20 through October 22 at Brandeis University.




SARA SHOSTAK

Professor of Sociology and Health: Science, Society & Policy

The Urban Farming Institute of Boston recently presented Shostak with its Sowing
Seeds of Success Award.




DOWNLOADS BY COUNTRY



Country Downloads Percent United States of America (the) 690323 48% United
Kingdom of Great Britain and Northern Ireland (the) 116023 8.13% Germany 74193
5.2% China 57022 3.99% United States 52974 3.71% All others 437233 31%

1,427,768
Total
690,323
United States of Ame...
48%
116,023
United Kingdom of Gr...
8.13%
74,193
Germany
5.2%
57,022
China
3.99%
52,974
United States
3.71%
437,233
All others
31%


REPOSITORY METRICS




TOP TEN


Recently added

Most downloaded

Most viewed


Journal article

First measurement of the cross section for top quark pair production with
additional charm jets using dileptonic final states in pp collisions at √s=13TeV

by Aram Apyan and  CMS Collaboration

The first measurement of the inclusive cross section for top quark pairs (t¯t)
produced in association with two additional charm jets is presented. The
analysis uses the dileptonic final states of t¯t events produced in
proton-proton collisions at a centre-of-mass energy of 13 TeV. The data
correspond to an integrated luminosity of 41.5fb−1, recorded by the CMS
experiment at the LHC. A new charm jet identification algorithm provides input
to a neural network that is trained to distinguish among t¯t events with two
additional charm (t¯tc¯c), bottom (t¯tb¯b), and light-flavour or gluon (t¯tLL)
jets. By means of a template fitting procedure, the inclusive t¯tc¯c, t¯tb¯b,
and t¯tLL cross sections are simultaneously measured, together with their ratios
to the inclusive t¯t + two jets cross section. This provides measurements of the
t¯tc¯c and t¯tb¯b cross sections of 10.1±1.2(stat)±1.4(syst)pb and
4.54±0.35(stat)±0.56(syst)pb, respectively, in the full phase space. The results
are compared and found to be consistent with predictions from two different
matrix element generators with next-to-leading order accuracy in quantum
chromodynamics, interfaced with a parton shower simulation.

...more

Journal article

Search for Higgs boson decays into Z and J/ψ and for Higgs and Z boson decays
into J/ψ or Y pairs in pp collisions at √s=13 TeV

by Aram Apyan and  CMS Collaboration

Decays of the Higgs boson into a boson and a or meson are searched for in
four-lepton final states with the CMS detector at the LHC. A data set of
proton-proton collisions corresponding to an integrated luminosity of 138fb−1 is
used. Using the same data set, decays of the Higgs and boson into quarkonium
pairs are also searched for. An observation of such decays with this sample
would indicate the presence of physics beyond the standard model. No evidence
for these decays has been observed and upper limits at the 95% confidence level
are placed on the corresponding branching fractions (B). Assuming longitudinal
polarization of the Higgs boson decay products, 95% confidence level observed
upper limits for and are 1.9×10−3 and 6.6×10−3, respectively.

...more

Journal article

Precision measurement of the Z boson invisible width in pp collisions at √s=13
TeV

by Aram Apyan and  CMS Collaboration

A precise measurement of the invisible width of the Z boson produced in
proton-proton collisions at a center-of-mass energy of 13 TeV is presented using
data recorded by the CMS experiment at the LHC, corresponding to an integrated
luminosity of 36.3fb−1. The result is obtained from a simultaneous fit to
kinematic distributions for two data samples of Z boson plus jets: one dominated
by Z boson decays to invisible particles and the other by Z boson decays to muon
and electron pairs. The invisible width is measured to be
523±3(stat)±16(syst)MeV. This result is the first precise measurement of the
invisible width of the Z boson at a hadron collider, and is the single most
precise direct measurement to date, competitive with the combined result of the
direct measurements from the LEP experiments.

...more

Journal article

Evidence for WW/WZ vector boson scattering in the decay channel ℓνqq produced in
association with two jets in proton-proton collisions at √s=13 TeV

by Aram Apyan and  CMS Collaboration

Evidence is reported for electroweak (EW) vector boson scattering in the decay
channel ℓʋqq of two weak vector bosons WV (V=W or Z), produced in association
with two parton jets. The search uses a data set of proton-proton collisions at
13 TeV collected with the CMS detector during 2016–2018 with an integrated
luminosity of 138fb−1. Events are selected requiring one lepton (electron or
muon), moderate missing transverse momentum, two jets with a large
pseudorapidity separation and a large dijet invariant mass, and a signature
consistent with the hadronic decay of a W/Z boson. The cross section is computed
in a fiducial phase space defined at parton level requiring all parton
transverse momenta pT>10GeV and at least one pair of outgoing partons with
invariant mass mqq>100GeV. The measured and expected EW WV production cross
sections are 1.90−0.46+0.53 pb and 2.23−0.11+0.08(scale)±0.05(PDF) pb,
respectively, where PDF is the parton distribution function. The observed EW
signal strength is µEW=0.85±0.12(stat)−0.17+0.19(syst), corresponding to a
signal significance of 4.4 standard deviations with 5.1 expected, and it is
measured keeping the quantum chromodynamics (QCD) associated diboson production
fixed to the standard model prediction. This is the first evidence of vector
boson scattering in the ℓʋqq decay channel at LHC. The simultaneous measurement
of the EW and QCD associated diboson production agrees with the standard model
prediction.

...more

Journal article

Search for electroweak production of charginos and neutralinos at √s=13TeV in
final states containing hadronic decays of WW, WZ, or WH and missing transverse
momentum

by Aram Apyan and  CMS Collaboration

This Letter presents a search for direct production of charginos and neutralinos
via electroweak interactions. The results are based on data from proton-proton
collisions at a center-of-mass energy of 13 TeV collected with the CMS detector
at the LHC, corresponding to an integrated luminosity of 137 fb−1. The search
considers final states with large missing transverse momentum and pairs of
hadronically decaying bosons WW, WZ, and WH, where H is the Higgs boson. These
bosons are identified using novel algorithms. No significant excess of events is
observed relative to the expectations from the standard model. Limits at the 95%
confidence level are placed on the cross section for production of
mass-degenerate wino-like supersymmetric particles χ˜1± and χ˜20, and
mass-degenerate higgsino-like supersymmetric particles χ˜1±, χ˜20, and χ˜30. In
the limit of a nearly-massless lightest supersymmetric particle χ˜10, wino-like
particles with masses up to 870 and 960 GeV are excluded in the cases of
χ˜20→Zχ˜10 and χ˜20→Hχ˜10, respectively, and higgsino-like particles are
excluded between 300 and 650 GeV.

...more

Journal article

Measurement of the azimuthal anisotropy of ϒ(1S) and ϒ(2S) mesons in PbPb
collisions at √sNN=5.02TeV

by Aram Apyan and  CMS Collaboration

The second-order Fourier coefficients (ʋ2) characterizing the azimuthal
distributions of and mesons produced in PbPb collisions at √sNN=5.02TeV are
studied. The mesons are reconstructed in their dimuon decay channel, as measured
by the CMS detector. The collected data set corresponds to an integrated
luminosity of 1.7nb−1. The scalar product method is used to extract the ʋ2
coefficients of the azimuthal distributions. Results are reported for the
rapidity range |y|<2.4, in the transverse momentum interval 0

...more

Journal article

Search for the rare decay of the W boson into a pion and a photon in
proton-proton collisions at √s=13TeV

by Aram Apyan and  CMS Collaboration

A search is performed for the rare decay W±→π±γ in proton-proton collisions at
√s=13TeV. Data corresponding to an integrated luminosity of 137fb−1 were
collected during 2016 to 2018 with the CMS detector. This analysis exploits a
novel search strategy based on W boson production in top quark pair events. An
inclusive search for the W±→π±γ decay is not optimal at the LHC because of the
high trigger thresholds. Instead, a trigger selection is exploited in which the
W boson originating from one of the top quarks is used to tag the event in a
leptonic decay. The W boson emerging from the other top quark is used to search
for the W±→π±γ signature. Such decays are characterized by an isolated track
pointing to a large energy deposit, and by an isolated photon of large
transverse momentum. The presence of b quark jets reduces the background from
the hadronization of light-flavor quarks and gluons. The W±→π±γ decay is not
observed. An upper exclusion limit is set to this branching fraction,
corresponding to 1.50×10−5 at 95% confidence level, whereas the expected upper
exclusion limit is 0.85−0.29+0.52×10−5.

...more

Journal article

Search for W′ bosons decaying to a top and a bottom quark at √s=13TeV in the
hadronic final state

by Aram Apyan and  CMS Collaboration

A search is performed for W′ bosons decaying to a top and a bottom quark in the
all-hadronic final state, in proton-proton collisions at a center-of-mass energy
of 13 TeV. The analyzed data were collected by the CMS experiment between 2016
and 2018 and correspond to an integrated luminosity of 137 fb−1. Deep neural
network algorithms are used to identify the jet initiated by the bottom quark
and the jet containing the decay products of the top quark when the W boson from
the top quark decays hadronically. No excess above the estimated standard model
background is observed. Upper limits on the production cross sections of W′
bosons decaying to a top and a bottom quark are set. Both left- and right-handed
W′ bosons with masses below 3.4 TeV are excluded at 95% confidence level, and
the most stringent limits to date on W′ bosons decaying to a top and a bottom
quark in the all-hadronic final state are obtained.

...more

Journal article

Are researchers in academic medicine flourishing? A survey of midcareer Ph.D.
and physician investigators

by Linda Helen Pololi,  Arthur T Evans,  Janet T Civian,  Lisa A Cooper,  Brian
K Gibbs,  Kacy Ninteau,  Rada K. Dagher,  Kimberly Bloom-Feshbach and  Robert
Brennan

Introduction:Midcareer research faculty are a vital part of the advancement of
science in U.S. medical schools, but there are troubling trends in recruitment,
retention, and burnout rates. Methods:The primary sampling frame for this online
survey was recipients of a single R01 or equivalent and/or K-award from 2013 to
2019. Inclusion criteria were 3-14 years at a U.S. medical school and rank of
associate professor or two or more years as assistant professor. Forty physician
investigators and Ph.D. scientists volunteered for a faculty development
program, and 106 were propensity-matched controls. Survey items covered
self-efficacy in career, research, work-life; vitality/burnout; relationships,
inclusion, trust; diversity; and intention to leave academic medicine.
Results:The majority (52%) reported receiving poor mentoring; 40% experienced
high burnout and 41% low vitality, which, in turn, predicted leaving intention
(P < 0.0005). Women were more likely to report high burnout (P = 0.01) and low
self-efficacy managing work and personal life (P = 0.01) and to be seriously
considering leaving academic medicine than men (P = 0.003). Mentoring quality (P
< 0.0005) and poor relationships, inclusion, and trust (P < 0.0005) predicted
leaving intention. Non-underrepresented men were very likely to report low
identity self-awareness (65%) and valuing differences (24%) versus
underrepresented men (25% and 0%; P < 0.0005). Ph.D.s had lower career
advancement self-efficacy than M.D.s (P < .0005). Conclusions:Midcareer Ph.D.
and physician investigators faced significant career challenges. Experiences
diverged by underrepresentation, gender, and degree. Poor quality mentoring was
an issue for most. Effective mentoring could address the concerns of this vital
component of the biomedical workforce.

...more

Journal article

Randomized controlled trial of a group peer mentoring model for US academic
medicine research faculty

by Linda Helen Pololi,  Arthur T Evans,  Mark Brimhall-Vargas,  Janet T Civian, 
Lisa A Cooper,  Brian K Gibbs,  Kacy Ninteau,  Vasilia Vasiliou and  Robert
Brennan

Introduction:Midcareer is a critical transition point for biomedical research
faculty and a common dropout point from an NIH-funded career. We report a study
to assess the efficacy of a group peer mentoring program for diverse biomedical
researchers in academic medicine, seeking to improve vitality, career
advancement, and cross-cultural competence. Methods:We conducted a stratified
randomized controlled trial with a waitlist control group involving 40
purposefully diverse early midcareer research faculty from 16 states who had a
first-time NIH R01 (or equivalent) award, a K training grant, or a similar major
grant. The yearlong intervention (2 to 3 days quarterly) consisted of
facilitated, structured, group peer mentoring. Main study aims were to enhance
faculty vitality, self-efficacy in achieving research success, career
advancement, mentoring others, and cultural awareness and appreciation of
diversity in the workplace. Results:Compared to the control group, the
intervention group's increased vitality did not reach statistical significance
(P = 0.20), but perceived change in vitality was 1.47 standard deviations higher
(D = 1.47, P = 0.03). Self-efficacy for career advancement was higher in the
intervention group (D = 0.41, P = 0.05) as was self-efficacy for research (D =
0.57, P = 0.02). The intervention group also valued diversity higher (D = 0.46,
P = 0.02), had higher cognitive empathy (D = 0.85, P = 0.03), higher
anti-sexism/racism skills (D = 0.71, P = 0.01), and higher self-efficacy in
mentoring others (D = 1.14, P = 0.007). Conclusions:The mentoring intervention
resulted in meaningful change in important dimensions and skills among a
national sample of diverse early midcareer biomedical faculty. This mentoring
program holds promise for addressing the urgencies of sustaining faculty
vitality and cross-cultural competence.

...more




WORKS ADDED BY YEARS

Year Works 2014 1051 2015 1055 2016 1139 2017 1012 2018 993 2019 1108 2020 1160
2021 1335 2022 1291 2023 996 2024 34 2025 1




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