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16 results on '"L. E. Finch"'

1. Investigating Local Parity Violation in Heavy-Ion Collisions Using Lambda Helicity

Author

S. J. Murray and L. E. Finch

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Charge separation, High Energy Physics::Phenomenology, FOS: Physical sciences, Parity (physics), Lambda, 01 natural sciences, Helicity, Magnetic field, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Experimental correlation, Heavy ion, Magnetic effect, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

We propose the measurement of net $\Lambda$ and $\bar{\Lambda}$ helicity, correlated event-by-event with the magnitude and sign of charge separation along the event's magnetic field direction, as a probe to investigate the Chiral Magnetic Effect in Heavy-Ion Collisions. With a simple simulation model of heavy-ion events that includes effects of Local Parity Violation, we estimate the experimental correlation signal that could be expected at RHIC given the results of previous measurements that are sensitive to the CME., Comment: 10 pages, 1 figure

Published
2018
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2. Antideuteron Yield at the AGS and Coalescence Implications

Author

A. J. Slaughter, S. Bennett, I. A. Pless, R. P. Scharenberg, Andrew S. Hirsch, T. Lainis, F. K. Wohn, G. Van Buren, J. D. Reid, M. L. Tincknell, J. L. Nagle, J. G. Lajoie, M. S. Z. Rabin, Hazim Jaradat, Senta Greene, L. E. Finch, John Hill, B. Fadem, F. S. Rotondo, H. Z. Huang, A. A. Rose, Q. Li, Claude Andre Pruneau, J. Sandweiss, P. Fachini, K. N. Barish, A. Chikanian, B. S. Kumar, T. E. Miller, M. E. Bertaina, R. D. Majka, S. Batsouli, B. Libby, R. Hoversten, J. K. Pope, A. Rimai, P. Haridas, N. T. Porile, W. S. Toothacker, N. K. George, M. G. Munhoz, Thomas Michael Cormier, Z. Z. Xu, T. A. Armstrong, Gerald A. Smith, S. D. Coe, Carl B. Dover, and R. Davies

Subjects
Coalescence (physics), Physics, Particle physics, Annihilation, Antimatter, High mass, FOS: Physical sciences, General Physics and Astronomy, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We present Experiment 864's measurement of invariant antideuteron yields in 11.5A GeV/c Au + Pt collisions. The analysis includes 250 million triggers representing 14 billion 10% central interactions sampled for events with high mass candidates. We find (1/2 pi pt) d^(2)N/dydpt = 3.5 +/- 1.5 (stat.) +0.9,-0.5 (sys.) x 10^(-8) GeV^(-2)c^(2) for 1.8=0.35 GeV/c (y(cm)=1.6) and 3.7 +/- 2.7 (stat.) +1.4,-1.5 (sys.) x 10^(-8) GeV^(-2)c^(2) for 1.4=0.26 GeV/c, and a coalescence parameter B2-bar of 4.1 +/- 2.9 (stat.) +2.3,-2.4 (sys.) x 10^(-3) GeV^(2)c^(-3). Implications for the coalescence model and antimatter annihilation are discussed., Comment: 8 pages, 4 figures, Latex, submitted to Phys. Rev. Lett

Published
2000

3. Antiproton production and antideuteron production limits in relativistic heavy ion collisions

Author

F. S. Rotondo, G. Van Buren, P. Haridas, N. K. George, Thomas Michael Cormier, M. L. Tincknell, K. N. Barish, R. D. Majka, J. G. Lajoie, J. D. Reid, P. Fachini, I. A. Pless, A. J. Slaughter, John Hill, S. Batsoulli, Q. Li, J. L. Nagle, A. Chikanian, J. K. Pope, W. S. Toothacker, B. S. Kumar, T. Lainis, F. K. Wohn, Andrew S. Hirsch, J. Sandweiss, T. E. Miller, R. P. Scharenberg, Senta Greene, L. E. Finch, B. Fadem, S. Bennett, N. T. Porile, T. A. Armstrong, B. Libby, M. G. Munhoz, M. S. Z. Rabin, Claude Andre Pruneau, R. Hoversten, S. D. Coe, H. Z. Huang, A. A. Rose, A. Rimai, Z. Z. Xu, R. Davies, Carl B. Dover, and Gerald A. Smith

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Particle physics, Antiparticle, FOS: Physical sciences, Multiplicity (mathematics), Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear physics, Baryon, Antiproton, Antimatter, Physics::Accelerator Physics, High Energy Physics::Experiment, Production (computer science), Physics::Atomic Physics, Nuclear Experiment (nucl-ex), Nuclear Experiment, Nucleon
Abstract

We present results from Experiment 864 for antiproton production and antideuteron limits in Au + Pb collisions at 11.5 GeV/c per nucleon. We have measured invariant multiplicities for antiprotons for rapidities 1.4{lt}y{lt}2.4 at low transverse momentum as a function of collision geometry. When compared with the results from Experiment 878 our measurements suggest a significant contribution to the measured antiproton yield from the decay of strange antibaryons. We have also searched for antideuterons and see no statistically significant signal. Thus, we set upper limits on the production at approximately 3{times}10{sup {minus}7} per 10{percent} highest multiplicity Au+Pb interaction. {copyright} {ital 1999} {ital The American Physical Society}

Published
1999

4. A high mass trigger for the E864 experiment at the AGS accelerator

Author

Graham C. Smith, F. S. Rotondo, John Hill, C.A. Peterson, Thomas Michael Cormier, J. G. Lajoie, S. D. Coe, G.A. Sleege, R. Hoversten, J. L. Nagle, B. Libby, M. L. Tincknell, F. K. Wohn, Z. Xu, N. T. Porile, R. P. Scharenberg, H. Z. Huang, H.D. Skank, G. Van Buren, R. D. Majka, A. Rimai, P. Fachini, Athanasios Petridis, B. Kim, L.A. Ewell, R. Davies, Claude Andre Pruneau, L. E. Finch, Andrew S. Hirsch, B. K. Srivastava, J. Sandweiss, M. G. Munhoz, and K. N. Barish

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Data acquisition, Hadron, Measuring instrument, Elementary particle, Sensitivity (control systems), Nuclear Experiment, Instrumentation, Energy (signal processing), Charged particle, Calorimeter
Abstract

The E864 experiment at the AGS is designed to carry out high sensitivity searches for a variety of possible new particles using relativistic heavy ion Au beams on Pb and Pt targets. In order to reach the desired sensitivities, a level-2 “late energy” trigger was built to select events in which a heavy particle is detected in a hadronic calorimeter with deposited energy and time-of-flight from the target exceeding preset values. The physics motivation for the trigger is discussed and and details of its hardware and software design are given. Performance results from recent E864 data taking runs are presented.

Published
1999

5. Search for Charged Strange Quark Matter Produced in11.5AGeV/cAu+PbCollisions

Author

R. Davies, A. Chikanian, G. E. Diebold, M. S. Z. Rabin, W. S. Toothacker, M. G. Munhoz, John Hill, Raymond A. Lewis, P. Spinelli, Claude Andre Pruneau, W. K. Wilson, I. A. Pless, G. de Cataldo, A. Rainò, A. Rimai, R. P. Scharenberg, Carl B. Dover, P. Haridas, J. K. Pope, Z. Xu, H. Z. Huang, B. Libby, B. S. Kumar, P. Dee, P. Fachini, R. Hoversten, N. Giglietto, K. Zhao, F. K. Wohn, B. Kim, J. Sandweiss, A. J. Slaughter, J. L. Nagle, Gerald A. Smith, N. K. George, Thomas Michael Cormier, M. J. Bennett, K. N. Barish, T. A. Armstrong, G. Van Buren, E. J. Wolin, M. L. Tincknell, N. T. Porile, J. D. Reid, B. K. Srivastava, Andrew S. Hirsch, Q. Li, T. Lainis, J. G. Lajoie, F. S. Rotondo, S. D. Coe, Senta Greene, L. E. Finch, R. D. Majka, and S. Bennett

Subjects
Quark, Physics, Nuclear physics, Nuclear reaction, Strange matter, Particle physics, Strange quark, Strangelet, General Physics and Astronomy, Elementary particle, Fermion, Charged particle
Abstract

We present results of a search for strange quark matter (strangelets) in 11.5 A GeV/c Au+Pb collisions from the 1994 and 1995 runs of experiment E864 at Brookhaven's AGS. We observe no strangelet candidates and set a 90% confidence level upper limit of approximately 3x10**-8 per 10% central interaction for the production of |Z|=1 and |Z|=2 strangelets over a large mass range and with metastable lifetimes of about 50 ns or more. These results place constraints primarily on quark-gluon plasma based production models for strangelets.

Published
1997

6. Antiproton Production in11.5AGeV/cAu+PbNucleus-Nucleus Collisions

Author

J. G. Lajoie, Raymond A. Lewis, P. Spinelli, Senta Greene, L. E. Finch, M. S. Z. Rabin, A. Rimai, R. P. Scharenberg, W. K. Wilson, M. L. Tincknell, J. Sandweiss, G. E. Diebold, J. D. Reid, N. T. Porile, John Hill, F. S. Rotondo, B. K. Srivastava, S. Bennett, P. Fachini, S. D. Coe, J. L. Nagle, A. Chikanian, N. K. George, I. A. Pless, F. K. Wohn, G. Van Buren, R. D. Majka, Thomas Michael Cormier, Q. Li, Andrew S. Hirsch, R. Davies, K. Zhao, A. J. Slaughter, M. J. Bennett, E. J. Wolin, N. Giglietto, B. S. Kumar, P. Dee, Gerald A. Smith, G. de Cataldo, A. Rainò, H. Z. Huang, B. Libby, Y. Li, Carl B. Dover, J. K. Pope, B. Kim, W. S. Toothacker, P. Haridas, K. N. Barish, M. G. Munhoz, Claude Andre Pruneau, and T. A. Armstrong

Subjects
Nuclear physics, Nuclear reaction, Physics, Particle physics, Antiparticle, Antiproton, Antimatter, Hadron, General Physics and Astronomy, Production (computer science), Alternating Gradient Synchrotron, Nucleon
Abstract

We present the first results from the E864 Collaboration on the production of antiprotons in 10{percent} central 11.5A GeV /c Au+Pb nucleus collisions at the Brookhaven Alternating Gradient Synchrotron. We report invariant multiplicities for antiproton production in the kinematic region 1.4{lt}y{lt}2.2 and 50{lt} p{sub T}{lt} 300 MeV/c , and compare our data with a first collision scaling model and previously published results from the E878 Collaboration. The differences between the E864 and E878 antiproton measurements and the implications for antihyperon production are discussed. {copyright} {ital 1997} {ital The American Physical Society}

Published
1997

7. Strangelets, antimatter and coalescence: First results from BNL E864

Author

K. N. Barish, J. G. Lajoie, M. L. Tincknell, A. Chikanian, N. K. George, I. A. Pless, P. Spinelli, Senta Greene, A.J. Slaughter, L. E. Finch, Thomas Michael Cormier, N. T. Porile, R. Davies, B. Kim, M. S. Z. Rabin, W. K. Wilson, A. Raino, G. E. Diebold, J. L. Nagle, T. A. Armstrong, S. Bennett, P. Fachini, P. Haridas, J. D. Reid, R. P. Scharenberg, G. A. Sleege, N. Giglietto, G. de Cataldo, B. K. Srivastava, Andrew S. Hirsch, A. Rimai, H. Z. Huang, R. D. Majka, John Hill, G. A. Smith, B. Libby, S. D. Coe, F. S. Rotondo, W. S. Toothacker, Claude Andre Pruneau, B. S. Kumar, R.A. Lewis, M. G. Munhoz, K. Zhao, Carl B. Dover, F. K. Wohn, J. K. Pope, P. Dee, E. J. Wolin, H. D. Skank, and J. Sandweiss

Subjects
Physics, Coalescence (physics), Nuclear physics, Nuclear and High Energy Physics, Strangelet, Antimatter
Published
1996

8. Search for stable Strange Quark Matter in lunar soil

Author

Richard Daniel Majka, Ke Han, W. Emmet, J. Ashenfelter, L. E. Finch, J. Sandweiss, Jes Madsen, Andreas Martin Heinz, Benjamin Monreal, and A. Chikanian

Subjects
Quark, Physics, Strange quark, Particle physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Strangelet, FOS: Physical sciences, General Physics and Astronomy, Cosmic ray, Elementary particle, Fermion, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Strange matter, Lunar soil, Nuclear Experiment (nucl-ex), Nuclear Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We report results from a search for strangelets (small chunks of Strange Quark Matter) in lunar soil using the Yale WNSL accelerator as a mass spectrometer. We have searched over a range in mass from A=42 to A=70 amu for nuclear charges 5, 6, 8, 9, and 11. No strangelets were found in the experiment. For strangelets with nuclear charge 8, a concentration in lunar soil higher than $10^{-16}$ is excluded at the 95% confidence level. The implied limit on the strangelet flux in cosmic rays is the most sensitive to date for the covered range and is relevant to both recent theoretical flux predictions and a strangelet candidate event found by the AMS-01 experiment., 4 pages, 3 figures, submitted to Phys. Rev. Lett

Published
2009

9. Production ofHΛ3andHΛ4in central11.5GeV∕cAu+Ptheavy ion collisions

Author

B. Libby, R. Hoversten, Qi Li, R. Davies, J. L. Nagle, A. Rose, N. K. George, Thomas Michael Cormier, M. E. Bertaina, J. D. Reid, A. Chikanian, S. Batsouli, G. Van Buren, W. S. Toothacker, A. J. Slaughter, I. A. Pless, Carl B. Dover, Z. Xu, J. K. Pope, Senta Greene, L. E. Finch, J. C. Hill, S. J. Bennett, T. E. Miller, J. Sandweiss, Gerald A. Smith, X. M. L. Tincknell, P. Haridas, J. G. Lajoie, N. T. Porile, Raymond A. Lewis, F. S. Rotondo, S. D. Coe, R. D. Majka, R. P. Scharenberg, T. Lainis, Claude Andre Pruneau, B. S. Kumar, M. S. Z. Rabin, A. S. Hirsch, A. Rimai, K. N. Barish, Hazim Jaradat, H. Z. Huang, F. K. Wohn, T. A. Armstrong, P. Fachini, B. Fadem, and Marcelo Gameiro Munhoz

Subjects
Physics, Nuclear and High Energy Physics, Nuclear Theory, Transverse momentum, Production (computer science), Rapidity, Center of mass, Baryon number, Atomic physics, Nuclear Experiment, Lambda, Hypertriton, Ion
Abstract

We present measurements from BNL AGS Experiment 864 of the $_{\ensuremath{\Lambda}}^{3}\mathrm{H}$ yield and of an upper limit on the $_{\ensuremath{\Lambda}}^{4}\mathrm{H}$ yield in central $11.5A\phantom{\rule{0.3em}{0ex}}\text{GeV}∕c\phantom{\rule{0.3em}{0ex}}\text{Au}+\text{Pt}$ collisions. The measurements span a rapidity range from center of mass, ${y}_{\mathrm{c.m.}}$, to ${y}_{\mathrm{c.m.}}+1$ and a transverse momentum range of $0l{p}_{t}\ensuremath{\leqslant}1.5\phantom{\rule{0.3em}{0ex}}\text{GeV}∕c$. We compare these results with E864 measurements of stable light nuclei and particle unstable nuclei yields of the same baryon number. The implications of these results for the coalescence of strange clusters are discussed.

Published
2004

10. Measurement of leading Λ’s andΔ++’s inp+PbCollisions at19GeV/c

Author

T. E. Miller, N. T. Porile, K. N. Barish, L. S. Liu, S. Q. Feng, A. Chikanian, P. Fachini, I. A. Pless, B. Fadem, J. D. Reid, S. Batsouli, G. Van Buren, Athanasios Petridis, H. Z. Huang, P. Haridas, A. Rose, R. P. Scharenberg, T. Lainis, R. Hoversten, A. J. Slaughter, H. Long, M. E. Bertaina, E. Yamamoto, N. K. George, Thomas Michael Cormier, Qi Li, J. L. Nagle, Charles Maguire, A. Tai, J. G. Lajoie, Z. Z. Xu, Marcelo Gameiro Munhoz, Senta Greene, L. E. Finch, M. S. Z. Rabin, A. S. Hirsch, Claude Andre Pruneau, Hazim Jaradat, F. K. Wohn, J. C. Hill, S. J. Bennett, J. Sandweiss, and R. D. Majka

Subjects
Nuclear physics, Baryon, Physics, Nuclear reaction, Nuclear and High Energy Physics, Hadron, Hyperon, Nucleon, Lambda baryon, Particle identification, Delta baryon
Published
2003

11. Production of particle unstable light nuclei in11.5AGeV/cAu+Pt heavy-ion collisions

Author

J. G. Lajoie, K. N. Barish, H. Z. Huang, P. Haridas, T. A. Armstrong, T. M. Cormier, M. S. Z. Rabin, C. B. Dover, R. D. Majka, L. E. Finch, N. K. George, A. Rimai, J. K. Pope, A. A. Rose, R. Hoversten, Z. Xu, S. D. Coe, S. J. Bennett, R. A. Lewis, J. L. Nagle, J. C. Hill, R. Davies, F. K. Wohn, Senta Greene, W. S. Toothacker, T. Lainis, C. A. Pruneau, B. Libby, M. L. Tincknell, P. Fachini, F. S. Rotondo, B. S. Kumar, B. Fadem, G. A. Smith, M. G. Munhoz, G. Van Buren, T. E. Miller, M. E. Bertaina, J. D. Reid, I. A. Pless, Q. Li, R. P. Scharenberg, A. Chikanian, A. S. Hirsch, N. T. Porile, H. Jaradat, J. Sandweiss, A. J. Slaughter, and S. Batsouli

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Light nucleus, Isotopes of lithium, Excited state, Nuclear Theory, Particle, Rapidity, Production (computer science), Atomic physics, Nuclear Experiment, Isotopes of helium
Abstract

We report measurements from experiment E864 at the BNL-AGS of the yields of particle unstable light nuclei in central collisions of ${}^{197}\mathrm{Au}$ with beam momentum of $11.5A$ $\mathrm{GeV}/c$ on ${}^{197}\mathrm{Pt}.$ Yields are reported as a function of rapidity for the nuclei ${}^{4}\mathrm{H},$ ${}^{4}\mathrm{Li},$ ${}^{5}\mathrm{He},$ and ${}^{5}\mathrm{Li}$ in the rapidity range from ${y}_{\mathrm{c}.\mathrm{m}.}$ to ${y}_{\mathrm{c}.\mathrm{m}.}+0.8$ and in the transverse momentum range of approximately $0.1l~{p}_{T}/Al~0.4\mathrm{GeV}/c.$ The yields are compared to previously reported yields and trends for the production of stable light nuclei. The nonobservation of two excited states ${}^{5}{\mathrm{He}}_{16.75\mathrm{MeV}}^{*}$ and ${}^{5}{\mathrm{Li}}_{16.66\mathrm{MeV}}^{*}$ is used to set an upper limit on the yields of these states.

Published
2001

12. Search for strange quark matter produced in relativistic heavy ion collisions

Author

P. Spinelli, Hazim Jaradat, Senta Greene, J. L. Nagle, G. Van Buren, John Hill, L. E. Finch, Q. Li, N. K. George, J. K. Pope, T. Lainis, Thomas Michael Cormier, W. K. Wilson, E. J. Wolin, G. DeCataldo, J. D. Reid, J. G. Lajoie, G. E. Diebold, P. Haridas, I. A. Pless, R. P. Scharenberg, A. J. Slaughter, M. S. Z. Rabin, B. S. Kumar, S. Bennett, N. T. Porile, P. Fachini, M. G. Munhoz, J. Sandweiss, F. K. Wohn, B. Kim, Andrew S. Hirsch, K. Zhao, R. Hoversten, N. Giglietto, T. E. Miller, W. S. Toothacker, M. L. Tincknell, H. Z. Huang, A. A. Rose, Carl B. Dover, P. Dee, A. Chikanian, Claude Andre Pruneau, A. Rimai, F. S. Rotondo, Gerald A. Smith, S. D. Coe, B. Libby, M. E. Bertaina, S. Batsouli, R. D. Majka, Z. Z. Xu, R. Davies, T. A. Armstrong, B. Fadem, K. N. Barish, and Raymond A. Lewis

Subjects
Physics, Nuclear and High Energy Physics, Light nucleus, Particle physics, Strange quark, Strangelet, Nuclear Theory, FOS: Physical sciences, Nuclear physics, Quark–gluon plasma, Heavy ion, Penalty factor, Nuclear Experiment (nucl-ex), Nuclear Experiment, Nucleon
Abstract

We present the final results from Experiment 864 of a search for charged and neutral strange quark matter produced in interactions of 11.5 GeV/c per nucleon Au beams with Pt or Pb targets. Searches were made for strange quark matter with A>4. Approximately 30 billion 10% most central collisions were sampled and no strangelet states with A, 35 pages, 18 figures, submitted to Phys. Rev. C

Published
2001

13. Measurements of light nuclei production in11.5AGeV/cAu+Pb heavy-ion collisions

Author

T. E. Miller, F. K. Wohn, I. A. Pless, A. Chikanian, T. Lainis, Z. Z. Xu, Senta Greene, L. E. Finch, M. L. Tincknell, Raymond A. Lewis, J. G. Lajoie, R. P. Scharenberg, S. D. Coe, R. Hoversten, P. Haridas, A. J. Slaughter, S. Bennett, J. Sandweiss, R. D. Majka, M. G. Munhoz, Gerald A. Smith, N. T. Porile, H. Z. Huang, A. A. Rose, J. K. Pope, Q. Li, T. A. Armstrong, Claude Andre Pruneau, F. S. Rotondo, P. Fachini, M. E. Bertaina, J. L. Nagle, S. Batsouli, B. Libby, Andrew S. Hirsch, G. Van Buren, M. S. Z. Rabin, J. D. Reid, A. Rimai, W. S. Toothacker, Carl B. Dover, B. S. Kumar, Hazim Jaradat, John Hill, B. Fadem, K. N. Barish, R. Davies, N. K. George, and Thomas Michael Cormier

Subjects
Physics, Coalescence (physics), Nuclear and High Energy Physics, Light nucleus, Nuclear Theory, Nuclear matter, Nuclear physics, Isospin, Transverse momentum, Heavy ion, Rapidity, Baryon number, Atomic physics, Nuclear Experiment
Abstract

We report on measurements by the E864 experiment at the BNL-AGS of the yields of light nuclei in collisions of {sup 197}Au with beam momentum of 11.5A GeV/c on targets of {sup 208}Pb and {sup 197}Pt. The yields are reported for nuclei with baryon number A=1 up to A=7, and typically cover a rapidity range from y{sub c.m.} to y{sub c.m.}+1 and a transverse momentum range of approximately 0.1{

Published
2000

14. Mass dependence of light nucleus production in ultrarelativistic heavy ion collisions

Author

A. J. Slaughter, S. Bennett, Carl B. Dover, M. S. Z. Rabin, A. Chikanian, Hazim Jaradat, I. A. Pless, M. L. Tincknell, Senta Greene, L. E. Finch, T. E. Miller, R. Davies, B. Libby, J. L. Nagle, John Hill, A. Rimai, Raymond A. Lewis, R. P. Scharenberg, P. Haridas, J. G. Lajoie, M. G. Munhoz, F. K. Wohn, J. K. Pope, S. D. Coe, Claude Andre Pruneau, N. K. George, Thomas Michael Cormier, W. S. Toothacker, G. Van Buren, P. Fachini, Gerald A. Smith, H. Z. Huang, A. A. Rose, B. S. Kumar, R. Hoversten, Z. Z. Xu, S. Batsouli, T. Lainis, Andrew S. Hirsch, J. D. Reid, Q. Li, R. D. Majka, F. S. Rotondo, J. Sandweiss, N. T. Porile, T. A. Armstrong, K. N. Barish, and B. Fadem

Subjects
Physics, Isotopes of lithium, Binding energy, Nuclear Theory, FOS: Physical sciences, General Physics and Astronomy, Nuclear physics, Helium-4, medicine.anatomical_structure, Helium-3, medicine, Nuclear binding energy, Rapidity, Nuclear Experiment (nucl-ex), Atomic physics, Nucleon, Nuclear Experiment, Nucleus
Abstract

Light nuclei can be produced in the central reaction zone via coalescence in relativistic heavy ion collisions. E864 at BNL has measured the production of ten light nuclei with nuclear number of A=1 to A=7 at rapidity $y\simeq1.9$ and $p_{T}/A\leq300MeV/c$. Data were taken with a Au beam of momentum of 11.5 A $GeV/c$ on a Pb or Pt target with different experimental settings. The invariant yields show a striking exponential dependence on nuclear number with a penalty factor of about 50 per additional nucleon. Detailed analysis reveals that the production may depend on the spin factor of the nucleus and the nuclear binding energy as well., (6 pages, 3 figures), some changes on text, references and figures' lettering. To be published in PRL (13Dec1999)

Published
1999

15. A spectrometer for study of high mass objects created in relativistic heavy ion reactions

Author

H.D. Skank, E. J. Wolin, F. S. Rotondo, B. Kim, M. L. Tincknell, N. T. Porile, A. Chikanian, S. D. Coe, J. D. Reid, K. N. Barish, H. Z. Huang, S. Bennett, Marcelo Gameiro Munhoz, P. Haridas, Raymond A. Lewis, A Rose, Y. Li, G. de Cataldo, P. Spinelli, R. Davies, F. K. Wohn, Gerald A. Smith, T.E Miller, A. J. Slaughter, Athanasios Petridis, B. K. Srivastava, T. A. Armstrong, M. S. Z. Rabin, R. D. Majka, W. K. Wilson, Claude Andre Pruneau, G. E. Diebold, B. S. Kumar, W. S. Toothacker, N. K. George, S. Batsouli, G. Van Buren, K. Zhao, T. Lainis, A. Rimai, Z. Z. Xu, Thomas Michael Cormier, J. L. Nagle, R.P Scharenberg, B. Libby, Senta Greene, L. E. Finch, J. Riso, Hazim Jaradat, J. C. Hill, J. Sandweiss, G Sleage, M. Bennett, P. Fachini, L.A. Ewell, J. G. Lajoie, W Emmet, R. Hoversten, N. Giglietto, B. Fadem, Q. Li, Andrew S. Hirsch, Carl B. Dover, J. K. Pope, P. Dee, and I. A. Pless

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Spectrometer, Physics::Instrumentation and Detectors, Strangelet, Nuclear Theory, trigger, tracking, Tracking (particle physics), Calorimeter, Nuclear physics, Time of flight, Measuring instrument, calorimeter, High Energy Physics::Experiment, Nuclear Experiment, heavy ions, Instrumentation, Isotopes of helium
Abstract

Experiment E864 at the Brookhaven AGS accelerator uses a high sensitivity, large acceptance spectrometer, designed to search for strangelets and other novel forms of matter produced in high-energy heavy ion collisions. The spectrometer has excellent acceptance and rate capabilities for measuring the production properties of known particles and nuclei such as p, d and 6 He . The experiment uses a magnetic spectrometer and employs redundant time of flight and position detectors and a hadronic calorimeter. In this paper we describe the design and performance of the spectrometer.

Published
1999

16. Observing spontaneous strong parity violation in heavy ion collisions

Author

A. Chikanian, R. S. Longacre, L. E. Finch, J. Sandweiss, and J. H. Thomas

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, Spontaneous symmetry breaking, Monte Carlo method, High Energy Physics::Phenomenology, FOS: Physical sciences, Observable, Parity (physics), Collision, Nuclear physics, Nuclear Theory (nucl-th), CP violation, Heavy ion, Nuclear Experiment, Nuclear theory
Abstract

We discuss the problem of observing spontaneous parity and CP violation in collision systems. We discuss and propose observables which may be used in heavy-ion collisions to observe such violations, as well as event-by-event methods to analyze the data. Finally, we discuss simple Monte Carlo models of these CP -violating effects which we have used to develop our techniques and from which we derive rough estimates of sensitivities to signals that may be seen at the relativistic heavy-ion collider.

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