Figure 1 - uploaded by C. J. Horowitz
Content may be subject to copyright.
1: Proposed FINeSSE location with respect to the existing neutrino target building (MI-12) and MiniBooNE detector. North is to the right in this drawing.
Source publication
![Figure 2.1: BNL E734 results on νp → νp and ¯ νp → ¯ νp [20]. The solid...](profile/C-Horowitz/publication/1981885/figure/fig2/AS:669436302327811@1536617460176/BNL-E734-results-on-np-np-and-np-np-20-The-solid-lines-are-fits-to-the-data_Q320.jpg)
Understanding the quark and gluon substructure of the nucleon has been a prime goal of both nuclear and particle physics for more than thirty years and has led to much of the progress in strong interaction physics. Still the flavor dependence of the nucleon's spin is a significant fundamental question that is not understood. Experiments measuring t...
Similar publications
![Figure 3: Measurements (see [12] for the original references) of the...](profile/Shlomo-Dado/publication/41216386/figure/fig2/AS:669498210254866@1536632220587/Measurements-see-12-for-the-original-references-of-the-inclusive-charged-particle_Q320.jpg)
The charged particle multiplicities of two- and three-jet events from the reaction e+e- -> Z0 -> hadrons are measured for Z0 decays to light quark (uds) flavors. Using recent theoretical expressions to account for biases from event selection, results corresponding to unbiased gluon jets are extracted over a range of jet energies from about 11 to 30...
Citations
... PV electron scattering measurements which are sensitive to the strange quark contributions but not to the axial-vector form factor have been carried out by various collaborations [41][42][43][44][45][46][47][48][49][50][51]. The DIS of neutrinos or of polarized charged leptons from nucleon and nuclear targets have been used to measure the electromagnetic and axial form factors of the nucleon in the elastic νp andνp scattering from the BNL E734 experiment [52], Fermilab Intense Neutrino Scattering Scintillator Experiment (FINeSSE) [53] at Fermi National Accelerator Laboratory (Fermilab). A determination of the strange form factors through a combined analysis of elastic νp andνp and PV electron scattering is performed in Ref. [54]. ...
In light of the improved precision of the experimental measurements and enormous theoretical progress, the nucleon form factors have been evaluated with an aim to understand how the static properties and dynamical behavior of nucleons emerge from the theory of strong interactions between quarks. We have analyzed the vector and axial-vector nucleon form factors (GE,Mp,n(Q2) and GAp,n(Q2)) using the spin observables in the chiral constituent quark model (χCQM) which has made a significant contribution to the unraveling of the internal structure of the nucleon in the nonperturbative regime. We have also presented a comprehensive analysis of the flavor decomposition of the form factors (GEq(Q2), GMq(Q2) and GAq(Q2) for q = u,d,s) within the framework of χCQM with emphasis on the extraction of the strangeness form factors which are fundamental to determine the spin structure and test the chiral symmetry breaking effects in the nucleon. The Q2 dependence of the vector and axial-vector form factors of the nucleon has been studied using the conventional dipole form of parametrization. The results are in agreement with the available experimental data.
... The electromagnetic form factors are among the most basic quantities containing information about the internal structure of the nucleons. Further, during the last few years, the standard electroweak theory has provided a firm basis for the role of weak interaction as a precision probe of the nucleon structure [5,6,7]. ...
... The original motivation for the SciBath detector was to reconstruct 1 Gev neutrino neutral-current elastic (NCel) scattering events, allowing a direct measurement of the strange-quark contribution to the spin of the nucleon [1]. The experimental signature for this interaction is a single low energy proton of typically 100 MeV kinetic energy, which has a range of approximately 10 cm in liquid scintillator. ...
... The detector described here, SciBath-768, is a prototype of the vertex detector proposed for the Fermilab Intense Neutrino Scattering Scintillator Experiment (FINeSSE) [1], which was was designed to measure these 10 cm proton tracks using the SciBath technology. The full-sized detector proposed consisted of 19,200 wavelength-shifting fibers immersed in liquid scintillator of volume (2.5 m) 3 . ...
The SciBath-768 detector is a prototype neutral particle detector offering
high-precision reconstruction of neutrino and neutron events. It consists of a
three dimensional grid of 768 wavelength-shifting fibers immersed in 82 liters
of liquid scintillator. Initially conceived as a charged particle detector for
neutrino studies, it is also sensitive to fast neutrons (1-100 MeV). Simulation
results show 30% efficiency and 30% energy resolution for 1-10 MeV tagged
neutron events. The apparatus has been commissioned and will be deployed in
Fall 2011 to measure neutrinos and neutrons 100 meters underground in the
Fermilab MINOS near-detector area.
... The measurement of the strange-quark contribution to the nucleon spin and also the study of neutrino oscillation have been underway at the MiniBooNE experiment under the FINeSSE program [7,8], which is one of the recent activities at Fermilab. In the near future experiments like Minerνa and SciBooNE will allow physicists to gain a considerable insight regarding the structure of the nucleon and the hadronic weak current via the neutrino-induced weak production of strange particles [9,10] This study is done at the elementary level where spin-1/2 and spin-0 free particles can be described by the Dirac and Klein-Gordon wave equations, respectively. ...
In this thesis a general relativistic formalism for neutrino-induced weak production of strange particles is presented. In our formalism it is shown that the differential cross section is constructed as a contraction between a leptonic tensor and a hadronic tensor. The electroweak theory of Glashow, Salam and Weinberg is used to calculate the leptonic tensor exactly. The hadronic current is determined from the newly derived general form of the weak hadronic current which is expressed in terms of eighteen invariant amplitudes that parametrize the hadron vertex. The Born diagram is used to approximate the unknown hadronic vertex and the numerical calculation is made by evaluating the tree diagrams in terms of standard weak form factors and the strong coupling constants in the framework of the Cabibbo theory and SU(3) symmetry. The investigation is made for charged current reactions in terms of the angular distribution of the differential cross section with respect to the outgoing kaon angle and the results are discussed.
... Schematic diagram of the MiniBooNE beam line at FNAL, taken from[61]. ...
Neutrino beams at from high-energy proton accelerators have been instrumental discovery tools in particle physics. Neutrino beams are derived from the decays of charged pi and K mesons, which in turn are created from proton beams striking thick nuclear targets. The precise selection and manipulation of the pi/K beam control the energy spectrum and type of neutrino beam. This article describes the physics of particle production in a target and manipulation of the particles to derive a neutrino beam, as well as numerous innovations achieved at past experimental facilities.
... A precise measurement of this ratio appears, however, problematic due to the difficulties associated with neutron detection. A measurement of the ratio of the NC-to-CC (NC/CC) cross sections appears more feasible and will be measured at FINeSSE [40]. Although sensitive to strangeness only in the numerator, the NC/CC ratio is simply related to the number of events with an outgoing proton and a missing mass with respect to the events with an outgoing proton in coincidence with a muon. ...
A relativistic distorted-wave impulse-approximation model is applied to neutral-current and charged-current quasi-elastic neutrino-nucleus scattering. The effects of final state interactions are investigated and the sensitivity of the results to the strange nucleon form factors is discussed in view of their possible experimental determination
... For instance, in the case of neutrino processes driven by the electroweak Neutral Current (NC), the energy spectrum and angular distribution of the ejected nucleons are the unique observables. Besides, the study of these distributions might also help to improve on our knowledge of the quark and gluon substructure of the nucleon, and in particular on the amount of nucleon spin carried by strange quarks [2]. ...
By means of a Monte Carlo cascade method, to account for the rescattering of the outgoing nucleon, we study the charged and neutral current inclusive one nucleon knockout reactions off nuclei induced by neutrinos. The nucleon emission process studied here is a clear signal for neutralcurrent neutrino driven reactions, and can be used in the analysis of future neutrino experiments. Nieves Pamplona,Juan Miguel, Juan.M.Nieves@ific.uv.es ; Vicente Vacas, Manuel Jose, Manuel.J.Vicente@ific.uv.es
... Experiments [4,5] measuring the spin content of the nucleon have reported conflicting results on the amount of nucleon spin carried by strange quarks [6]. Recently, the FINeSSE collaboration at Fermilab has suggested [7,8] that Quasi-Elastic (QE) neutrino-nucleus scattering, observed using a novel detection technique, provides a theoretically clean measure of this quantity. In this context, it is also necessary to control nuclear effects. ...
... Some of the Z 0 −absorption modes are depicted in Fig. 1. 6 Note that: (i) Eq. (3) holds with states normalized so that p| p ′ = (2π) 3 2p 0 δ 3 ( p − p ′ ), (ii) the sum over final states f includes an integration d 3 p j (2π) 3 2E j , for each particle j making up the system f , as well as a sum over all spins involved. 7 Thus, one readily finds ...
We study the quasielastic contribution to the inclusive (νl,νlN),(νl,l-N),(ν̅ l,ν̅ lN), and (ν̅ l,l+N) reactions in nuclei by using a Monte Carlo simulation method to account for the rescattering of the outgoing nucleon. As input, we take the reaction probability from the microscopical many-body framework developed in Phys. Rev. C 70, 055503 (2004) for charged-current-induced reactions, while for neutral currents we use results from a natural extension of the model described in that reference. For neutral-current neutrino-driven reactions, the nucleon emission process studied here is a clear signal that can be used in the analysis of future neutrino experiments.
... Experiments [4,5] measuring the spin content of the nucleon have reported conflicting results on the amount of nucleon spin carried by strange quarks [6]. Recently, the FINeSSE collaboration at Fermilab has suggested [7,8] that Quasi-Elastic (QE) neutrino-nucleus scattering, observed using a novel detection technique, provides a theoretically clean measure of this quantity. In this context, it is also necessary to control nuclear effects. ...
... Some of the Z 0 −absorption modes are depicted in Fig. 1. 6 Note that: (i) Eq. (3) holds with states normalized so that p| p ′ = (2π) 3 2p 0 δ 3 ( p − p ′ ), (ii) the sum over final states f includes an integration d 3 p j (2π) 3 2E j , for each particle j making up the system f , as well as a sum over all spins involved. 7 Thus, one readily finds ...
A previous model on inclusive charged-current quasi-elastic nuclear reactions
is extended to include neutral- and charged-current nucleon emission reactions.
The problem of outgoing nucleon propagation is treated by means of a Monte
Carlo simulation.
... While MiniBooNE's primary goal is to confirm the LSND result, this unique facility is also ideal for the study of supernova neutrinos, neutrino-nucleus scattering, and hadronic structure. An ambitious experimental program -the Fine-grained Intense Neutrino Scattering Scintillator Experiment (FINeSSE) -aims to measure the strange-quark contribution to the spin of the nucleon [4,5,6]. FINeSSE is part of a larger program started in the late 80's that attempts to answer a fundamental nucleon-structure question: how do the non-valence ("sea") quarks -particularly the strange quarks -contribute to the observed properties of the nucleon? ...
... A ) with one sign in the numerator and with the opposite sign in the denominator [see Eq. 31]. Unfortunately, R(p/n) is difficult to measure with the desired accuracy due to experimental difficulties associated with neutron detection [6]. It is for this reason that FINeSSE will focus initially on the neutral-to charged-current ratio (NC/CC): ...
... (2) will be measured by the FINeSSE collaboration with neutrinos in that energy range [6]. The cross section that results from adding the contributions from both muon helicities (h = ±1) and both neutron orbitals (1s 1/2 and 1p 3/2 ) is depicted in Fig. 3 by the solid line. ...
A formalism based on a relativistic plane wave impulse approximation is developed to investigate the strange-quark content ($g_{A}^{s}$) of the axial-vector form factor of the nucleon via neutrino-nucleus scattering. Nuclear structure effects are incorporated via an accurately calibrated relativistic mean-field model. The ratio of neutral- to charged-current cross sections is used to examine the sensitivity of this observable to $g_{A}^{s}$. For values of the incident neutrino energy in the range proposed by the FINeSSE collaboration and by adopting a value of $g_{A}^{s}=-0.19$, a 30% enhancement in the ratio is observed relative to the $g_{A}^{s}=0$ result.
