Phys. Rev. Lett. 125, 201803 (2020) We report on the first measurement of flux-integrated single differential
cross sections for charged-current (CC) muon neutrino ($\nu_\mu$) scattering on
argon ...with a muon and a proton in the final state,
$^{40}$Ar($\nu_\mu$,$\mu$p)X. The measurement was carried out using the Booster
Neutrino Beam at Fermi National Accelerator Laboratory and the MicroBooNE
liquid argon time projection chamber detector with an exposure of 4.59 $\times$
10$^{19}$ protons on target. Events are selected to enhance the contribution of
CC quasielastic (CCQE) interactions. The data are reported in terms of a total
cross section as well as single differential cross sections in final state muon
and proton kinematics. We measure the integrated per-nucleus CCQE-like cross
section (i.e. for interactions leading to a muon, one proton and no pions above
detection threshold) of (4.93 $\pm$ 0.76stat $\pm$ 1.29sys) $\times$
10$^{-38}$cm$^2$, in good agreement with theoretical calculations. The single
differential cross sections are also in overall good agreement with theoretical
predictions, except at very forward muon scattering angles that correspond to
low momentum-transfer events.
Phys. Rev. D 102, 112013 (2020) We present an analysis of MicroBooNE data with a signature of one muon, no
pions, and at least one proton above a momentum threshold of 300 MeV/c
(CC0$\pi$Np). This is ...the first differential cross section measurement of this
topology in neutrino-argon interactions. We achieve a significantly lower
proton momentum threshold than previous carbon and scintillator-based
experiments. Using data collected from a total of approximately $1.6 \times
10^{20}$ protons-on-target, we measure the muon neutrino cross section for the
CC0$\pi$Np interaction channel in argon at MicroBooNE in the Booster Neutrino
Beam which has a mean energy of around 800 MeV. We present the results from a
data sample with estimated efficiency of 29\% and purity of 76\% as
differential cross sections in five reconstructed variables: the muon momentum
and polar angle, the leading proton momentum and polar angle, and the
muon-proton opening angle. We include smearing matrices that can be used to
"forward-fold" theoretical predictions for comparison with these data. We
compare the measured differential cross sections to a number of recent theory
predictions demonstrating largely good agreement with this first-ever data set
on argon.
Some transplant-related complications, such as the engraftment syndrome, are thought to be mediated by cytokines released during expansion of hematopoietic progenitors at the time of neutrophil ...recovery. Since there is an inverse correlation between CD34+ cell dose and time to neutrophil recovery, we sought to determine if peritransplant toxicity and early mor tality were adversely affected by high CD34+ cell doses.
The study group included 186 women with breast cancer who received high-dose cyclophosphamide, carmustine, thiotepa and an autologous PBSC transplant. The median CD34+ cell dose was 5.9×106/kg (1.0–154.7×106/kg). Patients were categorized by CD34+ cell dose (1.0–3.5, 3.6–5.9, 6.0–19.9, and 20.0–154.7×106/kg) for assessment of outcomes.
Grades 2–4 mucositis occurred in 49%, cardiac toxicity in 7%, pulmonary toxicity in 5%, cystitis in 4%, diarrhea in 3%, renal toxicity in 1%, and central nervous system toxicity in 1%, A Grade 2–4 regimen-related toxi city occurred in 109 patients (59%) and Grade 3–4 in eight patients (4%). Overall survival was 100% at Day 30, 96% at Day 90, and 89% at 1 year. Treatment-related mortality was 3.8%. In multivariate analyses that included prior chemotherapy, disease status, visceral metastases, prior chest radiation and age, CD34+ cell dose group was not an independent risk fac tor for Grade 2–4 mucositis, Grade 2–4 maximum toxicity, Grade ≥3 cumulative toxicity, 90 day survival or 1 year survival.
Ne conclude that CD34+ cell doses >20×106/kg do not affect transplant outcome in a negative or positive fashion.
Among the most fundamental observables of nucleon structure, electromagnetic form factors are a crucial benchmark for modern calculations describing the strong interaction dynamics of the nucleon's ...quark constituents; indeed, recent proton data have attracted intense theoretical interest. In this Letter, we report new measurements of the proton electromagnetic form factor ratio using the recoil polarization method, at momentum transfers Q2=5.2, 6.7, and 8.5 GeV2. By extending the range of Q2 for which G(E)(p) is accurately determined by more than 50%, these measurements will provide significant constraints on models of nucleon structure in the nonperturbative regime.
The electric form factor of the neutron was determined from measurements of the d-->(e-->,e'n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ...ammonia (15ND3) target in which the deuteron polarization was perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle detector. We find G(n)(E)=0.0526+/-0.0033(stat)+/-0.0026(sys) and 0.0454+/-0.0054+/-0.0037 at Q(2)=0.5 and 1.0 (GeV/c)(2), respectively.
Phys.Rev.Lett.98:132003,2007 We have examined the spin structure of the proton in the region of the
nucleon resonances (1.085 GeV < W < 1.910 GeV) at an average four momentum
transfer of Q^2 = 1.3 ...GeV^2. Using the Jefferson Lab polarized electron beam, a
spectrometer, and a polarized solid target, we measured the asymmetries
A_parallel and A_perp to high precision, and extracted the asymmetries A_1 and
A_2, and the spin structure functions g_1 and g_2. We found a notably non-zero
A_perp, significant contributions from higher-twist effects, and only weak
support for polarized quark--hadron duality.
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