Sebastian Wojcicki

• Master's Student at Gdansk University of Technology

This paper describes the hardware and operations of the Neutrinos at the Main Injector (NuMI) beam at Fermilab. It elaborates on the design considerations for the beam as a whole and for individual elements. The most important design details of individual components are described. Beam monitoring systems and procedures, including the tuning and ali...

We report a two-detector measurement of the propagation speed of neutrinos over a baseline of 734 km. The measurement was made with the NuMI beam at Fermilab between the near and far MINOS detectors. The fractional difference between the neutrino speed and the speed of light is determined to be $(v/c-1) = (1.0 \pm 1.1) \times 10^{-6}$, consistent w...

We report the first observation of seasonal modulations in the rates of cosmic ray multiple-muon events at two underground sites, the MINOS Near Detector with an overburden of 225 mwe, and the MINOS Far Detector site at 2100 mwe. At the deeper site, multiple-muon events with muons separated by more than 8 m exhibit a seasonal rate that peaks during...

Kinematic distributions from an inclusive sample of 1.41 x 10^6 charged-current nu_mu interactions on iron, obtained using the MINOS Near Detector exposed to a wide-band beam with peak flux at 3 GeV, are compared to a conventional treatment of neutrino scattering within a Fermi gas nucleus. Results are used to guide the selection of a subsample enr...

A sample of 1.53 × 10 9 cosmic-ray-induced single muon events has been recorded at 225 m water equivalent using the MINOS near detector. The underground muon rate is observed to be highly correlated with the effective atmospheric temperature. The coefficient α T , relating the change in the muon rate to the change in the vertical effective temperat...

We report on a new analysis of neutrino oscillations in MINOS using the complete set of accelerator and atmospheric data. The analysis combines the ν_{μ} disappearance and ν_{e} appearance data using the three-flavor formalism. We measure |Δm_{32}^{2}|=[2.28-2.46]×10^{-3} eV^{2} (68% C.L.) and sin^{2}θ_{23}=0.35-0.65 (90% C.L.) in the normal hierar...

We report on a new analysis of neutrino oscillations in MINOS using the complete set of accelerator and atmospheric data. The analysis combines the $\nu_{\mu}$ disappearance and $\nu_{e}$ appearance data using the three-flavor formalism. We measure $|\Delta m^{2}_{32}|=[2.28-2.46]\times10^{-3}\mbox{\,eV}^{2}$ (68% C.L.) and $\sin^{2}\theta_{23}=0.3...

This Letter of Intent outlines a proposal to build a large, yet cost-effective, 100 kton fiducial mass water Cherenkov detector that will initially run in the NuMI beam line. The CHIPS detector (CHerenkov detector In Mine PitS) will be deployed in a flooded mine pit, removing the necessity and expense of a substantial external structure capable of...

We report measurements of oscillation parameters from $\nu_{mu}$ and $\bar{\nu}_{\mu}$ disappearance using beam and atmospheric data from MINOS. The data comprise exposures of \unit[$10.71 \times 10^{20}$]{protons on target (POT)} in the $\nu_{\mu}$-dominated beam, $\unit[3.36\times10^{20}]{POT}}$ in the $\bar{\nu}_{\mu}$-enhanced beam, and 37.88 k...

We report new constraints on flavor-changing non-standard neutrino interactions from the MINOS experiment, in which neutrino versus antineutrino interactions can be distinguished on an event-by-event basis. We analyzed a combined set of beam neutrino and antineutrino data from the well-understood NuMI beam, and found no evidence for deviations from...

We report on $\nu_e$ and $\bar{\nu}_e$ appearance in $\nu_\mu$ and $\bar{\nu}_\mu$ beams using the full MINOS data sample. The comparison of these $\nu_e$ and $\bar{\nu}_e$ appearance data at a 735 km baseline with $\theta_{13}$ measurements by reactor experiments probes $\delta$, the $\theta_{23}$ octant degeneracy, and the mass hierarchy. This an...

This paper reports measurements of atmospheric neutrino and antineutrino interactions in the MINOS Far Detector, based on 2553 live-days (37.9 kton-years) of data. A total of 2072 candidate events are observed. These are separated into 905 contained-vertex muons and 466 neutrino-induced rock-muons, both produced by charged-current $\nu_{\mu}$ and $...

The Proceedings of the 2011 workshop on Fundamental Physics at the Intensity Frontier. Science opportunities at the intensity frontier are identified and described in the areas of heavy quarks, charged leptons, neutrinos, proton decay, new light weakly-coupled particles, and nucleons, nuclei, and atoms.

We report an improved measurement of muon anti-neutrino disappearance over a distance of 735km using the MINOS detectors and the Fermilab Main Injector neutrino beam in a muon anti-neutrino enhanced configuration. From a total exposure of 2.95e20 protons on target, of which 42% have not been previously analyzed, we make the most precise measurement...

We have searched for sidereal variations in the rate of antineutrino interactions in the MINOS Near Detector. Using antineutrinos produced by the NuMI beam, we find no statistically significant sidereal modulation in the rate. When this result is placed in the context of the Standard Model Extension theory we are able to place upper limits on the c...

We report the results of a search for $\nu_{e}$ appearance in a $\nu_{\mu}$ beam in the MINOS long-baseline neutrino experiment. With an improved analysis and an increased exposure of $8.2\times10^{20}$ protons on the NuMI target at Fermilab, we find that $2\sin^2(\theta_{23})\sin^2(2\theta_{13})<0.12\ (0.20)$ at 90% confidence level for $\delta\ma...

We report constraints on antineutrino oscillation parameters that were obtained by using the two MINOS detectors to measure the 7% muon antineutrino component of the NuMI neutrino beam. In the Far Detector, we select 130 events in the charged-current muon antineutrino sample, compared to a prediction of 136.4 +/- 11.7(stat) ^{+10.2}_{-8.9}(syst) ev...

This Letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for ν(μ) production, accumulating an exposure of 1.71 × 10²⁰ protons on target. In the Far Detector, 97 charged current ν(μ) events are observed. The no-oscillation hypothesis predicts 156 event...

This review article describes the current status and future prospects of accelerator neutrino physics. The emphasis is on recent developments in the oscillation physics area but there is also a limited discussion about the status of neutrino cross sections. The approach taken is pedagogical and an effort is made to explain the basic techniques used...

Results are reported from a search for active to sterile neutrino oscillations in the MINOS long-baseline experiment, based on the observation of neutral-current neutrino interactions, from an exposure to the NuMI neutrino beam of $7.07\times10^{20}$ protons on target. A total of 802 neutral-current event candidates is observed in the Far Detector,...

Measurements of neutrino oscillations using the disappearance of muon neutrinos from the Fermilab NuMI neutrino beam as observed by the two MINOS detectors are reported. New analysis methods have been applied to an enlarged data sample from an exposure of 7.25×10(20) protons on target. A fit to neutrino oscillations yields values of |Δm(2)|=(2.32(-...

We searched for a sidereal modulation in the MINOS far detector neutrino rate. Such a signal would be a consequence of Lorentz and CPT violation as described by the standard-model extension framework. It also would be the first detection of a perturbative effect to conventional neutrino mass oscillations. We found no evidence for this sidereal sign...

We searched for a sidereal modulation in the MINOS far detector neutrino rate. Such a signal would be a consequence of Lorentz and CPT violation as described by the standard-model extension framework. It also would be the first detection of a perturbative effect to conventional neutrino mass oscillations. We found no evidence for this sidereal sign...

The shadowing of cosmic ray primaries by the moon and sun was observed by the MINOS far detector at a depth of 2070mwe using 83.54 million cosmic ray muons accumulated over 1857.91 live-days. The shadow of the moon was detected at the 5.6 σ level and the shadow of the sun at the 3.8 σ level using a log-likelihood search in celestial coordinates. Th...

The temperature of the upper atmosphere affects the height of primary cosmic ray interactions and the production of high-energy cosmic ray muons which can be detected deep underground. The MINOS far detector at Soudan, MN, has collected over 67 × 10^6 cosmic ray induced muons. The underground muon rate measured over a period of five years exhibits...

The energy dependence of the neutrino-iron and antineutrino-iron inclusive charged-current cross sections and their ratio have been measured using a high-statistics sample with the MINOS near detector exposed to the NuMI beam from the main injector at Fermilab. Neutrino and antineutrino fluxes were determined using a low hadronic energy subsample o...

A search for depletion of the combined flux of active neutrino species over a 735 km baseline is reported using neutral-current interaction data recorded by the MINOS detectors in the NuMI neutrino beam. Such a depletion is not expected according to conventional interpretations of neutrino oscillation data involving the three known neutrino flavors...

The temperature of the upper atmosphere affects the height of primary cosmic ray interactions and the production of high-energy cosmic ray muons which can be detected deep underground. The MINOS far detector at Soudan MN, USA, has collected over 67 million cosmic ray induced muons. The underground muon rate measured over a period of five years exhi...

This Letter reports on a search for ν_μ → ν_e transitions by the MINOS experiment based on a 3.14×10^(20) protons-on-target exposure in the Fermilab NuMI beam. We observe 35 events in the Far Detector with a background of 27±5(stat)±2(syst) events predicted by the measurements in the Near Detector. If interpreted in terms of ν_μ → ν_e oscillations,...

This Letter reports on a search for nu(mu) --> nu(e) transitions by the MINOS experiment based on a 3.14x10(20) protons-on-target exposure in the Fermilab NuMI beam. We observe 35 events in the Far Detector with a background of 27+/-5(stat)+/-2(syst) events predicted by the measurements in the Near Detector. If interpreted in terms of nu(mu) --> nu...

The rate of high energy cosmic ray muons as measured underground is shown to be strongly correlated with upper-air temperatures during short-term atmospheric (10-day) events. The effects are seen by correlating data from the MINOS underground detector and temperatures from the European Centre for Medium Range Weather Forecasts during the winter per...

We report the first detailed comparisons of the rates and spectra of neutral-current neutrino interactions at two widely separated locations. A depletion in the rate at the far site would indicate mixing between nu(mu) and a sterile particle. No anomalous depletion in the reconstructed energy spectrum is observed. Assuming oscillations occur at a s...

A search for a sidereal modulation in the MINOS near detector neutrino data was performed. If present, this signature could be a consequence of Lorentz and CPT violation as predicted by the effective field theory called the standard-model extension. No evidence for a sidereal signal in the data set was found, implying that there is no significant c...

(G. J. Feldman is the Harvard author) The Main Injector Neutrino Oscillation Search (MINOS) experiment uses an accelerator-produced neutrino beam to perform precision measurements of the neutrino oscillation parameters in the "atmospheric neutrino" sector associated with muon neutrino disappearance. This long-baseline experiment measures neutrino i...

This Letter reports new results from the MINOS experiment based on a two-year exposure to muon neutrinos from the Fermilab NuMI beam. Our data are consistent with quantum-mechanical oscillations of neutrino flavor with mass splitting |Deltam2| = (2.43+/-0.13) x 10(-3) eV2 (68% C.L.) and mixing angle sin2(2theta) > 0.90 (90% C.L.). Our data disfavor...

(G. J. Feldman is the Harvard author) This Letter reports new results from the MINOS experiment based on a two-year exposure to muon neutrinos from the Fermilab NuMI beam. Our data are consistent with quantum-mechanical oscillations of neutrino flavor with mass splitting |delta m^2|=(2.43±0.13)×10^-3 eV^2 (68% C.L.) and mixing angle (sin(2*theta))^...

We report the results of a search for νμ disappearance by the Main Injector Neutrino Oscillation Search [ D. G. Michael et al. Phys. Rev. Lett. 97 191801 (2006)]. The experiment uses two detectors separated by 734 km to observe a beam of neutrinos created by the Neutrinos at the Main Injector facility at Fermi National Accelerator Laboratory. The d...

The velocity of a ∼3 GeV neutrino beam is measured by comparing detection times at the near and far detectors of the MINOS experiment, separated by 734 km. A total of 473 far detector neutrino events was used to measure (v-c)/c=5.1±2.9×10-5 (at 68% C.L.). By correlating the measured energies of 258 charged-current neutrino events to their arrival t...

This Technical Design Report (TDR) describes the preliminary design of the NOνA accelerator upgrades, NOνA detectors, detector halls and detector sites. Compared to the March 2006 and November 2006 NOνA Conceptual Design Reports (CDR), critical value engineering studies have been completed and the alternatives still active in the CDR have been narr...

The 5.4 kton MINOS far detector has been taking charge-separated cosmic ray muon data since the beginning of August, 2003 at a depth of 2070 m.w.e. in the Soudan Underground Laboratory, Minnesota, USA. The data with both forward and reversed magnetic field running configurations were combined to minimize systematic errors in the determination of th...

We found 140 neutrino-induced muons in 854.24 live days in the MINOS far detector, which has an acceptance for neutrino-induced muons of 6.91×106 cm2 sr. We looked for evidence of neutrino disappearance in this data set by computing the ratio of the number of low momentum muons to the sum of the number of high momentum and unknown momentum muons fo...

This Letter reports results from the MINOS experiment based on its initial exposure to neutrinos from the Fermilab NuMI beam. The rates and energy spectra of charged current nu(mu) interactions are compared in two detectors located along the beam axis at distances of 1 and 735 km. With 1.27 x 10(20) 120 GeV protons incident on the NuMI target, 215...

The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the first MINOS observations of νμ and ν̅ μ charged-current atmospheric neutrino interactions based on an exposure of 418 days. The ratio of upward- to downwar...

17 pages, 16 figures, submitted to Phys. Rev. D

We describe the design, construction, readout, tests, and performance of planar drift chambers, based on 5-mm-diameter copperized Mylar and Kapton straws, used in an experimental search for rare kaon decays. The experiment took place in the high-intensity neutral beam at the Alternating Gradient Synchrotron of Brookhaven National Laboratory, using...

The MINOS experiment employs both a far and near detector to study neutrino oscillations. The near detector is used to characterize the beam before it has travelled far enough for oscillations to significantly occur. Oscillation measurements, including the energy spectrum of charged-current events at the near and far detectors, are made by comparin...

The MINOS Calibration Detector (CalDet) is a small version of the MINOS Near and Far neutrino detectors. A program of exposure to beams of muons, electrons, pions and protons at the CERN PS will provide calibration of the calorimetric and topological response of the Near and Far detectors. In this talk, we briefly discuss the goals and design of th...

Radial distribution measurements of the density j(r) in two (at a known focus plane position) or three beam cross-sections are enough for estimation of the angular distribution of the beam current density j(dr/dz) (z coincides with the beam axis) when the electron beam current density can be characterised by a 2-D Gaussian distribution in the phase...

The discovery of neutrino oscillations marks a major milestone in the history of neutrino physics, and opens a new window to the still mysterious origin of masses and flavour mixing. Many current and forthcoming experiments will answer open questions; however, a major step forward, up to and possibly including CP violation in the neutrino-mixing ma...

The discovery of neutrino oscillations marks a major milestone in the history of neutrino physics, and opens a new window to the still mysterious origin of masses and flavour-mixing. Many current and forthcoming experiments will answer open questions; however, a major step forward, up to and possibly including CP violation in the neutrino-mixing ma...

An equipment for measuring radial current distribution in electron beam produced by technology electron optical system with power up to 10kW is described. The principle of operation of apparatus and examples of beam characteristics are presented. Two movable plates: one water-cooled protection plate and other- analysing plate behind it are used. Ev...

We report results from Experiment 871, performed at the BNL AGS, of a measurement of the branching ratio KL0→μ+μ- with respect to the CP-violating mode KL0→π+π-. This experiment detected over 6200 candidate μ+μ- events, a factor of 6 more than that seen in all previous measurements combined. The resulting branching ratio Γ(KL0→μ+μ-)/Γ(KL0→π+π-) = (...

Results from numerical experiments and direct measurements for the analysis of an axially symmetric triode electron gun with thermionic cathode for electron beam welding are presented and discussed. Computer simulation is carried out using the new version of the GUN-EBT software package. The self-consistent model takes into account the energy spect...

The most sensitive experiment to date to search for the muon and electron lepton number violating decay K0L-->μ+/-e-/+ has detected no events consistent with this process. Based on this result, the 90% confidence level upper limit on the branching fraction is B\(K0L-->μ+/-e-/+\)<4.7×10-12.

In an experiment designed to search for and study very rare two-body decay modes of the K-long, we have observed four examples of the decay K-long -> e+ e-, where the expected background is 0.17+-0.10 events. This observation translates into a branching fraction of 8.7^{+5.7}_{-4.1} X 10^{-12}, consistent with recent theoretical predictions. This r...

We describe the development and testing of a novel beam stop for use in a rare kaon decay experiment at the Brookhaven AGS. The beam stop is located inside a dipole spectrometer magnet in close proximity to straw drift chambers and intercepts a high-intensity neutral hadron beam. The design process, involving both Monte Carlo simulations and beam t...

The results are given of an investigation of electron beam welding, concerning the correlation between the process parameters such as weld depth, focusing parameter and thermal efficiency. Weld quality data for various welding velocities, beam powers and positions of the focusing plane relative to the sample surface are given. The goal was to achie...

We have performed an additional analysis to clarify the interpretation of two candidate events which were the result of a search for an H dibaryon. {copyright} {ital 1997} {ital The American Physical Society}

The experimental investigations of the correlation between the parameters of welds and the parameters of welding process have always been a subject of special interest of the users of electron beam welding machines. Usually, the results of these investigations are presented in the form of diagrams, showing the correlation between the depth of welds...

We have searched for a neutral $H$ dibaryon decaying via $H$\rightarrow${}$\Lambda${}n$ and $H$\rightarrow${}{$\Sigma${}}^{0}n$. Our search has yielded two candidate events from which we set an upper limit on the $H$ production cross section. Normalizing to the inclusive $$\Lambda${}$ production cross section, we find $\frac{(\frac{d{$\sigma${}}_{H...

We have searched for long-lived H dibaryons (six-quark uuddss states) in a neutral beam produced by 24.1 GeV/c p-Pt collisions. The signature was exclusive Lambda0Lambda0 production from diffractive dissociation of H's striking a plastic scintillator. We observed 40 Lambda0Lambda0 events with a background of 3.2 events, but see no evidence of H dis...

In this paper intense electron beam is studied by computer simulation

Using 5 mm diameter copper coated mylar straw tubes at a potential of 2.30 KV relative to a concentric 20 m diameter gold-plated tungsten anode, it has been observed that with very low flow rates of CF4-based gases the conductive copper cathode material may be removed entirely from the mylar surface.

Construction, readout, tests, and performance of planar drift chambers, based on 5-mm diameter copperized Mylar straws, used in experiment E871 at BNL is briefly described and discussed.

This article reviews the current situation in the field of rare K decays: the relevant phenomenology, the present experimental situation, and prospects for the near future. Study of rare K decays can make a significant contribution in a number of different frontier areas of research in high-energy physics. In the area of CP violation, study of such...

A search for the decay [ital K][sub [ital L]][sup 0][r arrow][mu][sup [plus minus]][ital e[minus plus]] with significantly increased experimental sensitivity has yielded no events. The 90% confidence level limit on the branching ratio is [ital B]([ital K][sub [ital L]][sup 0][r arrow][mu][sup [plus minus]][ital e[minus plus]])[lt]3.9[times]10[sup [...

We have obtained upper limits for the decays K0L-->μe and K0L-->ee. The limits on the branching ratios are B(K0L-->μe) <1.1×10-8 and B(K0L-->ee)<1.1×10-8 (90% C.L). In a simultaneous search for the previously observed decay K0L-->μμ, we have identified two events.

A measurement of the average lifetime of hadrons containing bottom quarks is presented. The b hadrons are produced in e+e- annihilation at 29 GeV, and the lifetime is determined from the impact parameters of high-transverse-momentum electrons produced in the decay of the b hadrons. A b lifetime of b=1.17-0.22+0.27(stat)0.16+0.17(sys) psec is determ...

A measurement is reported on the elastic scattering of quasi-real photons generated by one beam with the particles of the other in e+e- interactions at sqrt(s) = 29 GeV performed using the DELCO detector at PEP. The events are characterized by coplanar and anti-tagged e gamma pairs with large visible energy where the charge of the electron is corre...

We report the results of a study of the three-prong-decay mode of the tau in data taken with the DELCO detector at the SLAC e+e- storage ring PEP. We determine the total three-prong branching ratio to be B(3)=(12.1+/-0.5+/-1.2)% and the exclusive branching ratios B(tau-->pi+pi-pi+/-nu)=(5.0+/-1 .0)% and B(tau-->pi+pi-pi+/-pi0nu)=(6 .0+/-1.2)%, resp...

We report final results on prompt electron production in hadronic events from e+e- annihilations at &surd;s =29 GeV, obtained with the DELCO detector at the SLAC storage ring PEP. We find the semielectronic branching ratios of charm and bottom quarks to be B(c-->se+nue)=(11.6-0.9 +1.1)% and B(b-->ce-nu¯e)=(14.9-1.9 +2.2)% respectively. These result...

A measurement of the D0 lifetime using the impact-parameter method is presented. The D0 sample is obtained from identified D*+/- decays in e+e- annihilations into hadrons at center-of-mass energy of 29 GeV. The maximum-likelihood method used is found to be insensitive to the specific choice of cuts and uncertainties in backgrounds, giving the D0 li...

A sample of events enriched with b production is obtained with the DELCO detector at PEP and is used to measure the mean multiplicity and spectra of charged particles in bottom-quark jets. Bottom-quark jets are found to be significantly softer and more spherical than jets in general hadronic events.

We report a measurement of the branching ratios for two decay modes of the tau lepton: R/sub B/(tau/sup + -/..-->..K/sup + -/K/sup - +/..pi../sup + -/..nu../sub tau/) = (0.22/sub -0.11//sup +0.17/)% and R/sub B/(tau/sup + -/..-->..k/sup + -/..pi../sup - +/..pi../sup + -/(..pi..° )..nu../sub tau/) = (0.22/sub -0.13//sup +0.16/)%. The separation of...

We have studied inclusive D* production using the DELCO detector at PEP. Our technique involved kaon identification in the momentum range above 3.2 GeV/c using a threshold gas erenkov counter. This leads to a model-independent upper limit on D0-D»0 mixing of 8.1% (90% confidence level). We also have measured the charm fragmentation function, which...

We have studied inclusive D*+/- production using the DELCO detector at PEP. Our technique involved kaon identification in the momentum range above 3.2 GeV/c using a threshold gas Cerenkov counter. This leads to a model-independent upper limit on D0-D¯ 0 mixing of 8.1% (90% confidence level). We also have measured the charm fragmentation function, w...

Results are presented of an untagged e+e− → e+e− + π+π− experiment performed at PEP with the DELCO detector. In the invariant-mass range 0.7 ⩽ Wππ < 2.0 GeV/c2, the QED e+e− background is identified and eliminated, and both the π+π− predictions and the μ+μ− and K+K− background substractions are normalized to the measurement of the e e+e− events. Th...

The forward production of charm states in 278 GeV π− Fe interactions has been studied via the production of prompt single muons with momentum ≳ 20 GeV/c. The production of prompt 1u− is significantly larger than the production of prompt 1u+ events. For xD ≳ 0.2 the data indicate that on the average D mesons are produced with a (1−x)2 distribution....

In an experiment performed at Fermilab (E-595) we have measured the production of prompt single muons and dimuons in hadronic interactions. Data were taken with both 350 GeV protons and 280 GeV π-′s incident on an iron “beam dump” instrumented with scintillation counters. Density extrapolations were used to separate prompt muons from muons originat...

Results are presented of an untagged e + e − → e + e − + π + π − experiment performed at PEP with the DELCO detector. In the invariant-mass range 0.7 ⩽ W ππ < 2.0 GeV/ c 2 , the QED e + e − background is identified and eliminated, and both the π + π − predictions and the μ + μ − and K + K − background substractions are normalized to the measurement...

The forward production of charm states in 350 GeV p-Fe interactions has been studied via the production of prompt single muons with momentum p ≳ 20 GeV/c. The data indicate equal production of single μ+ and μ− events. The observed momentum distributions can be fit with the hypothesis that D mesons are produced with an invariant cross section propor...

At the CERN SPS we have measured a deep inelastic μ± cross section asymmetry at momentum transfers Q2 ranging from 15 to 180GeV2. The result is in quantitative agreement with the WS/GIM standard electroweak model and allows to determine the muon neutral current couplings.