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4. Microscale 3-D Capacitance Tomography with a CMOS Sensor Array

Author

Abdelatty, Manar, Incandela, Joseph, Hu, Kangping, Larkin, Joseph W., Reda, Sherief, and Rosenstein, Jacob K.

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Electrical capacitance tomography (ECT) is a nonoptical imaging technique in which a map of the interior permittivity of a volume is estimated by making capacitance measurements at its boundary and solving an inverse problem. While previous ECT demonstrations have often been at centimeter scales, ECT is not limited to macroscopic systems. In this paper, we demonstrate ECT imaging of polymer microspheres and bacterial biofilms using a CMOS microelectrode array, achieving spatial resolution of 10 microns. Additionally, we propose a deep learning architecture and an improved multi-objective training scheme for reconstructing out-of-plane permittivity maps from the sensor measurements. Experimental results show that the proposed approach is able to resolve microscopic 3-D structures, achieving 91.5% prediction accuracy on the microsphere dataset and 82.7% on the biofilm dataset, including an average of 4.6% improvement over baseline computational methods.

Published
2023

5. Photon-rejection Power of the Light Dark Matter eXperiment in an 8 GeV Beam

Author

Åkesson, Torsten, Bravo, Cameron, Brennan, Liam, Bryngemark, Lene Kristian, Butti, Pierfrancesco, Dukes, E. Craig, Dutta, Valentina, Echenard, Bertrand, Eichlersmith, Thomas, Eisch, Jonathan, Elén, Einar, Ehrlich, Ralf, Froemming, Cooper, Furmanski, Andrew, Gogate, Niramay, Grieco, Chiara, Group, Craig, Herde, Hannah, Herwig, Christian, Hitlin, David G., Horoho, Tyler, Incandela, Joseph, Ketchum, Wesley, Krnjaic, Gordan, Li, Amina, Mans, Jeremiah, Masterson, Phillip, Middleton, Sophie, Moreno, Omar, Mullier, Geoffrey, Muse, Joseph, Nelson, Timothy, O'Dwyer, Rory, Östman, Leo, Oyang, James, Pascadlo, Jessica, Pöttgen, Ruth, Sarmiento, Luis G., Schuster, Philip, Solt, Matthew, Suarez, Cristina Mantilla, Tompkins, Lauren, Toro, Natalia, Tran, Nhan, Wallin, Erik, Whitbeck, Andrew, and Zhang, Danyi

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The Light Dark Matter eXperiment (LDMX) is an electron-beam fixed-target experiment designed to achieve comprehensive model independent sensitivity to dark matter particles in the sub-GeV mass region. An upgrade to the LCLS-II accelerator will increase the beam energy available to LDMX from 4 to 8 GeV. Using detailed GEANT4-based simulations, we investigate the effect of the increased beam energy on the capabilities to separate signal and background, and demonstrate that the veto methodology developed for 4 GeV successfully rejects photon-induced backgrounds for at least $2\times10^{14}$ electrons on target at 8 GeV., Comment: 28 pages, 20 figures; corrected author list

Published
2023

6. Current Status and Future Prospects for the Light Dark Matter eXperiment

Author

Åkesson, Torsten, Blinov, Nikita, Brand-Baugher, Lukas, Bravo, Cameron, Bryngemark, Lene Kristian, Butti, Pierfrancesco, Doglioni, Caterina, Dukes, Craig, Dutta, Valentina, Echenard, Bertrand, Ehrlich, Ralf, Eichlersmith, Thomas, Furmanski, Andrew, Greenstein, Chloe, Group, Craig, Gogate, Niramay, Hegde, Vinay, Herwig, Christian, Hitlin, David G., Hoang, Duc, Horoho, Tyler, Incandela, Joseph, Ketchum, Wesley, Krnjaic, Gordan, Li, Amina, Li, Shirley, Lin, Dexu, Mans, Jeremiah, Suarez, Cristina Mantilla, Masterson, Phillip, Meier, Martin, Middleton, Sophie, Moreno, Omar, Mullier, Geoffrey, Nelson, Timothy, Oyang, James, Pascadlo, Jessica, Pöttgen, Ruth, Prestel, Stefan, Pico, Luis Sarmiento, Schuster, Philip, Solt, Matthew, Tompkins, Lauren, Toro, Natalia, Tran, Nhan, Whitbeck, Andrew, Zhou, Kevin, and Zichi, Laura

Subjects
High Energy Physics - Experiment
Abstract

The constituents of dark matter are still unknown, and the viable possibilities span a vast range of masses. The physics community has established searching for sub-GeV dark matter as a high priority and identified accelerator-based experiments as an essential facet of this search strategy. A key goal of the accelerator-based dark matter program is testing the broad idea of thermally produced sub-GeV dark matter through experiments designed to directly produce dark matter particles. The most sensitive way to search for the production of light dark matter is to use a primary electron beam to produce it in fixed-target collisions. The Light Dark Matter eXperiment (LDMX) is an electron-beam fixed-target missing-momentum experiment that realizes this approach and provides unique sensitivity to light dark matter in the sub-GeV range. This contribution provides an overview of the theoretical motivation, the main experimental challenges, how LDMX addresses these challenges, and projected sensitivities. We further describe the capabilities of LDMX to explore other interesting new and standard physics, such as visibly-decaying axion and vector mediators or rare meson decays, and to provide timely electronuclear scattering measurements that will inform the modeling of neutrino-nucleus scattering for DUNE., Comment: 26 pages, 17 figures. Contribution to Snowmass 2021

Published
2022

7. A High Efficiency Photon Veto for the Light Dark Matter eXperiment

Author

Åkesson, Torsten, Blinov, Nikita, Bryngemark, Lene, Colegrove, Owen, Collura, Giulia, Dutta, Craig Dukes. Valentina, Echenard, Bertrand, Eichlersmith, Thomas, Group, Craig, Hiltbrand, Joshua, Hitlin, David G., Incandela, Joseph, Krnjaic, Gordan, Lazaro, Juan, Li, Amina, Mans, Jeremiah, Masterson, Phillip, McCormick, Jeremy, Moreno, Omar, Mullier, Geoffrey, Nagar, Akshay, Nelson, Timothy, Niendorf, Gavin, Oyang, James, Petersen, Reese, Pöttgen, Ruth, Schuster, Philip, Siegel, Harrison, Toro, Natalia, Tran, Nhan, and Whitbeck, Andrew

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

Fixed-target experiments using primary electron beams can be powerful discovery tools for light dark matter in the sub-GeV mass range. The Light Dark Matter eXperiment (LDMX) is designed to measure missing momentum in high-rate electron fixed-target reactions with beam energies of 4 GeV to 16 GeV. A prerequisite for achieving several important sensitivity milestones is the capability to efficiently reject backgrounds associated with few-GeV bremsstrahlung, by twelve orders of magnitude, while maintaining high efficiency for signal. The primary challenge arises from events with photo-nuclear reactions faking the missing-momentum property of a dark matter signal. We present a methodology developed for the LDMX detector concept that is capable of the required rejection. By employing a detailed GEANT4-based model of the detector response, we demonstrate that the sampling calorimetry proposed for LDMX can achieve better than $10^{-13}$ rejection of few-GeV photons. This suggests that the luminosity-limited sensitivity of LDMX can be realized at 4 GeV and higher beam energies.

Published
2019

9. Light Dark Matter eXperiment (LDMX)

Author

Åkesson, Torsten, Berlin, Asher, Blinov, Nikita, Colegrove, Owen, Collura, Giulia, Dutta, Valentina, Echenard, Bertrand, Hiltbrand, Joshua, Hitlin, David G., Incandela, Joseph, Jaros, John, Johnson, Robert, Krnjaic, Gordan, Mans, Jeremiah, Maruyama, Takashi, McCormick, Jeremy, Moreno, Omar, Nelson, Timothy, Niendorf, Gavin, Petersen, Reese, Pöttgen, Ruth, Schuster, Philip, Toro, Natalia, Tran, Nhan, and Whitbeck, Andrew

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

We present an initial design study for LDMX, the Light Dark Matter Experiment, a small-scale accelerator experiment having broad sensitivity to both direct dark matter and mediator particle production in the sub-GeV mass region. LDMX employs missing momentum and energy techniques in multi-GeV electro-nuclear fixed-target collisions to explore couplings to electrons in uncharted regions that extend down to and below levels that are motivated by direct thermal freeze-out mechanisms. LDMX would also be sensitive to a wide range of visibly and invisibly decaying dark sector particles, thereby addressing many of the science drivers highlighted in the 2017 US Cosmic Visions New Ideas in Dark Matter Community Report. LDMX would achieve the required sensitivity by leveraging existing and developing detector technologies from the CMS, HPS and Mu2e experiments. In this paper, we present our initial design concept, detailed GEANT-based studies of detector performance, signal and background processes, and a preliminary analysis approach. We demonstrate how a first phase of LDMX could expand sensitivity to a variety of light dark matter, mediator, and millicharge particles by several orders of magnitude in coupling over the broad sub-GeV mass range.

Published
2018

10. US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report

Author

Battaglieri, Marco, Belloni, Alberto, Chou, Aaron, Cushman, Priscilla, Echenard, Bertrand, Essig, Rouven, Estrada, Juan, Feng, Jonathan L., Flaugher, Brenna, Fox, Patrick J., Graham, Peter, Hall, Carter, Harnik, Roni, Hewett, JoAnne, Incandela, Joseph, Izaguirre, Eder, McKinsey, Daniel, Pyle, Matthew, Roe, Natalie, Rybka, Gray, Sikivie, Pierre, Tait, Tim M. P., Toro, Natalia, Van De Water, Richard, Weiner, Neal, Zurek, Kathryn, Adelberger, Eric, Afanasev, Andrei, Alexander, Derbin, Alexander, James, Antochi, Vasile Cristian, Asner, David Mark, Baer, Howard, Banerjee, Dipanwita, Baracchini, Elisabetta, Barbeau, Phillip, Barrow, Joshua, Bastidon, Noemie, Battat, James, Benson, Stephen, Berlin, Asher, Bird, Mark, Blinov, Nikita, Boddy, Kimberly K., Bondi, Mariangela, Bonivento, Walter M., Boulay, Mark, Boyce, James, Brodeur, Maxime, Broussard, Leah, Budnik, Ranny, Bunting, Philip, Caffee, Marc, Caiazza, Sabato Stefano, Campbell, Sheldon, Cao, Tongtong, Carosi, Gianpaolo, Carpinelli, Massimo, Cavoto, Gianluca, Celentano, Andrea, Chang, Jae Hyeok, Chattopadhyay, Swapan, Chavarria, Alvaro, Chen, Chien-Yi, Clark, Kenneth, Clarke, John, Colegrove, Owen, Coleman, Jonathon, Cooke, David, Cooper, Robert, Crisler, Michael, Crivelli, Paolo, D'Eramo, Francesco, D'Urso, Domenico, Dahl, Eric, Dawson, William, De Napoli, Marzio, De Vita, Raffaella, DeNiverville, Patrick, Derenzo, Stephen, Di Crescenzo, Antonia, Di Marco, Emanuele, Dienes, Keith R., Diwan, Milind, Dongwi, Dongwi Handiipondola, Drlica-Wagner, Alex, Ellis, Sebastian, Ezeribe, Anthony Chigbo, Farrar, Glennys, Ferrer, Francesc, Figueroa-Feliciano, Enectali, Filippi, Alessandra, Fiorillo, Giuliana, Fornal, Bartosz, Freyberger, Arne, Frugiuele, Claudia, Galbiati, Cristian, Galon, Iftah, Gardner, Susan, Geraci, Andrew, Gerbier, Gilles, Graham, Mathew, Gschwendtner, Edda, Hearty, Christopher, Heise, Jaret, Henning, Reyco, Hill, Richard J., Hitlin, David, Hochberg, Yonit, Hogan, Jason, Holtrop, Maurik, Hong, Ziqing, Hossbach, Todd, Humensky, T. B., Ilten, Philip, Irwin, Kent, Jaros, John, Johnson, Robert, Jones, Matthew, Kahn, Yonatan, Kalantarians, Narbe, Kaplinghat, Manoj, Khatiwada, Rakshya, Knapen, Simon, Kohl, Michael, Kouvaris, Chris, Kozaczuk, Jonathan, Krnjaic, Gordan, Kubarovsky, Valery, Kuflik, Eric, Kusenko, Alexander, Lang, Rafael, Leach, Kyle, Lin, Tongyan, Lisanti, Mariangela, Liu, Jing, Liu, Kun, Liu, Ming, Loomba, Dinesh, Lykken, Joseph, Mack, Katherine, Mans, Jeremiah, Maris, Humphrey, Markiewicz, Thomas, Marsicano, Luca, Martoff, C. J., Mazzitelli, Giovanni, McCabe, Christopher, McDermott, Samuel D., McDonald, Art, McKinnon, Bryan, Mei, Dongming, Melia, Tom, Miller, Gerald A., Miuchi, Kentaro, Nazeer, Sahara Mohammed Prem, Moreno, Omar, Morozov, Vasiliy, Mouton, Frederic, Mueller, Holger, Murphy, Alexander, Neilson, Russell, Nelson, Tim, Neu, Christopher, Nosochkov, Yuri, O'Hare, Ciaran, Oblath, Noah, Orrell, John, Ouellet, Jonathan, Pastore, Saori, Paul, Sebouh, Perelstein, Maxim, Peter, Annika, Phan, Nguyen, Phinney, Nan, Pivovaroff, Michael, Pocar, Andrea, Pospelov, Maxim, Pradler, Josef, Privitera, Paolo, Profumo, Stefano, Raggi, Mauro, Rajendran, Surjeet, Randazzo, Nunzio, Raubenheimer, Tor, Regenfus, Christian, Renshaw, Andrew, Ritz, Adam, Rizzo, Thomas, Rosenberg, Leslie, Rubbia, Andre, Rybolt, Ben, Saab, Tarek, Safdi, Benjamin R., Santopinto, Elena, Scarff, Andrew, Schneider, Michael, Schuster, Philip, Seidel, George, Sekiya, Hiroyuki, Seong, Ilsoo, Simi, Gabriele, Sipala, Valeria, Slatyer, Tracy, Slone, Oren, Smith, Peter F, Smolinsky, Jordan, Snowden-Ifft, Daniel, Solt, Matthew, Sonnenschein, Andrew, Sorensen, Peter, Spooner, Neil, Srivastava, Brijesh, Stancu, Ion, Strigari, Louis, Strube, Jan, Sushkov, Alexander O., Szydagis, Matthew, Tanedo, Philip, Tanner, David, Tayloe, Rex, Terrano, William, Thaler, Jesse, Thomas, Brooks, Thorpe, Brianna, Thorpe, Thomas, Tiffenberg, Javier, Tran, Nhan, Trovato, Marco, Tully, Christopher, Tyson, Tony, Vachaspati, Tanmay, Vahsen, Sven, van Bibber, Karl, Vandenbroucke, Justin, Villano, Anthony, Volansky, Tomer, Wang, Guojian, Ward, Thomas, Wester, William, Whitbeck, Andrew, Williams, David A., Wing, Matthew, Winslow, Lindley, Wojtsekhowski, Bogdan, Yu, Hai-Bo, Yu, Shin-Shan, Yu, Tien-Tien, Zhang, Xilin, Zhao, Yue, and Zhong, Yi-Ming

Subjects
High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment
Abstract

This white paper summarizes the workshop "U.S. Cosmic Visions: New Ideas in Dark Matter" held at University of Maryland on March 23-25, 2017., Comment: 102 pages + references

Published
2017

11. Electrical Capacitance Tomography of Cell Cultures on a CMOS Microelectrode Array

Author

Abdelatty, Manar, Incandela, Joseph, Hu, Kangping, Joshi, Pushkaraj, Larkin, Joseph W., Reda, Sherief, and Rosenstein, Jacob K.

Abstract

Electrical capacitance tomography (ECT) can be used to predict information about the interior volume of an object based on measured capacitance at its boundaries. Here, we present a microscale capacitance tomography system with a spatial resolution of 10 microns using an active CMOS microelectrode array. We introduce a deep learning model for reconstructing 3-D volumes of cell cultures using the boundary capacitance measurements acquired from the sensor array, which is trained using a multi-objective loss function that combines a pixel-wise loss function, a distribution-based loss function, and a region-based loss function to improve model's reconstruction accuracy. The multi-objective loss function enhances the model's reconstruction accuracy by 3.2% compared to training only with a pixel-wise loss function. Compared to baseline computational methods, our model achieves an average of 4.6% improvement on the datasets evaluated. We demonstrate our approach on experimental datasets of bacterial biofilms, showcasing the system's ability to resolve microscopic spatial features of cell cultures in three dimensions. Microscale capacitance tomography can be a low-cost, low-power, label-free tool for 3-D imaging of biological samples.

Published
2024
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12. Status and Prospects of Top-Quark Physics

Author

Incandela, Joseph R., Quadt, Arnulf, Wagner, Wolfgang, and Wicke, Daniel

Subjects
High Energy Physics - Experiment
Abstract

The top quark is the heaviest elementary particle observed to date. Its large mass of about 173 GeV/c^2 makes the top quark act differently than other elementary fermions, as it decays before it hadronises, passing its spin information on to its decay products. In addition, the top quark plays an important role in higher-order loop corrections to standard model processes, which makes the top quark mass a crucial parameter for precision tests of the electroweak theory. The top quark is also a powerful probe for new phenomena beyond the standard model. During the time of discovery at the Tevatron in 1995 only a few properties of the top quark could be measured. In recent years, since the start of Tevatron Run II, the field of top-quark physics has changed and entered a precision era. This report summarises the latest measurements and studies of top-quark properties and gives prospects for future measurements at the Large Hadron Collider (LHC)., Comment: 76 pages, 35 figures, submitted to Progress in Particle and Nuclear Physics

Published
2009
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14. The Status of CMS

Author

Incandela, Joseph R.

Subjects
Physics - Instrumentation and Detectors
Abstract

After a brief overview of the Compact Muon Solenoid (CMS) experiment, the status of construction, installation and commissioning is described. Very good progress has been achieved in the past year. Though many significant challenges still lie ahead, CMS should be ready for recording data from first collisions in the Large Hadron Collider (LHC) accelerator complex at CERN, Comment: 7 pages, 8 figures, Proceedings for the 2006 Hadron Collider Physics conference at Duke University

Published
2007

15. Large Charmless Yield in B Decays and Inclusive B Decay Puzzles

Author

Dunietz, Isard, Incandela, Joseph, Snider, Frederick, and Yamamoto, Hitoshi

Subjects
High Energy Physics - Phenomenology
Abstract

In recent studies of inclusive $B$ decays, it has been suggested that either $B$ mesons decay much more copiously to final states with no open charm than currently assumed, or $B(D^0 \to K^-\pi^+)$ has to be reduced significantly. This note takes the experimental $B(D^0 \to K^-\pi^+)$ at its face value and estimates $B(b\to$ no open charm) using complementary methods: one accounts for the $c$ quark in $b\to c$ transitions, the other accounts for the $\bar c$ quark in $b\to c\bar c s$ transitions. Through cancellation of errors, the average gives our best estimate of $B(b\to$ no open charm), and the difference measures the consistency. The results of the methods are consistent with each other, strongly suggesting a much enhanced $B(b\to$ no open charm). This observation indicates that non-perturbative QCD effects are probably causing a sizable fraction of the $b\to c\bar cs$ transitions to be seen as charmless $b\to s$ processes, contrary to smaller traditional expectations. This mechanism has generally been overlooked and may explain the existing experimental data within the framework of the standard model. We then briefly discuss implications on baryon production governed by $b\to c\bar cs$ processes, rare hadronic $B$ decays and CP violation studies., Comment: 26 pages, 5 figures, Latex. Expanded and two new figures added

Published
1996
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16. Comments on Recent Measurements of R_c and R_b

Author

Dunietz, Isard, Incandela, Joseph, Snider, Frederick D., Tesima, Kyuzo, and Watanabe, Isamu

Subjects
High Energy Physics - Phenomenology
Abstract

Discrepancies between Standard Model predictions and experimental measurements of the fractions R_c and R_b of hadronic Z decays to charm and bottom are investigated. We show that there exists a discrepancy in two complementary determinations of B(Bbar --> D X). Reducing the branching ratio B(D0 --> K- Pi+) by about 15% from currently accepted values to 3.50+/-0.21 removes the discrepancy. Since B(D0 --> K- Pi+) calibrates most charmed hadron yields, the reduced value also eliminates the discrepancy between the predicted and measured values of R_c and mitigates a problem in semileptonic B decays. A reduction in B(D0 --> K- Pi+) would also mean that roughly 15% of all D0 and D+ decays have not been properly taken into account. It is shown that if the missing decay modes involve multiple charged particles, they would be more likely to pass the requirements for lifetime B tagging at LEP and SLC. This would mean that the charm tagging efficiency in (Z --> c cbar) has been underestimated. As a consequence R_b would need to be revised downward, potentially bringing it in line with the Standard Model prediction., Comment: RevTeX, 32 pages, 3 figures

Published
1996

18. Seven Lessons Learned from General Education Reform at Saint Mary's College

Author

Incandela, Joseph M.

Abstract

Saint Mary's College, a single-gender Catholic institution in northern Indiana with approximately 1,600 students, has just revised a general education curriculum that had been in place for nearly forty years. The board of trustees unanimously approved the new curriculum in April 2010. In this article, the author discusses seven key lessons learned along the way.

Published
2011

26. A search for Lorentz-boosted Higgs bosons decaying to charm quarks in the CMS experiment using deep neural networks

Author

Qu, Huilin, Incandela, Joseph R.1, Qu, Huilin, Qu, Huilin, Incandela, Joseph R.1, and Qu, Huilin

Abstract

Measurement of the decay of the Higgs boson to charm quarks provides a direct probe of the Higgs coupling to second-generation quarks. Therefore, it is crucial for understanding the structure of Yukawa couplings. In this thesis, a search for the Higgs boson decaying to charm quarks with the CMS experiment is presented. The search is designed for Lorentz-boosted Higgs bosons produced in association with vector (V) bosons (W or Z bosons). A novel approach that reconstructs both quarks from the Higgs boson decay with a single large-radius jet is adopted. The charm quark pair is identified with an advanced deep learning--based algorithm. This approach leads to a highly competitive result: Using proton-proton collision data corresponding to an integrated luminosity of 35.9 fb-1, an observed (expected) upper limit on the VH cross section times the H->cc branching fraction of 71 (49) times the standard model expectation at 95% confidence level is obtained.A detailed description of the deep learning--based boosted object identification algorithm is also presented in this thesis. It is a versatile algorithm designed to identify and classify hadronic decays of highly Lorentz-boosted top quarks and W, Z, Higgs bosons. Using deep neural networks to directly access and process the raw information of all constituent particle-flow candidates of a jet, this advanced algorithm has achieved significant performance improvements compared to traditional approaches.

Published
2019

27. Search for stop scalar quarks at FCC-hh

Author

Gouskos, Loukas, Sung, Allan, and Incandela, Joseph

Subjects
Condensed Matter::Materials Science, Physics::Instrumentation and Detectors, High Energy Physics::Lattice, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Accelerators and Storage Rings
Abstract

We present the analyses of the search for a scalar stop quark, carried out in the context of the FCC-hh detector performance study group.

Published
2018

28. Prophetic and Public: The Social Witness of U.S. Catholicism.

Author

Incandela, Joseph M.

Subjects
Prophetic and Public: The Social Witness of U.S. Catholicism (Book) -- Heyer, Kristin E., Books -- Book reviews
Abstract

Prophetic and Public: The Social Witness of U.S. Catholicism. By Kristin E. Heyer. Washington, D.C.: Georgetown University Press, 2006. 248pp. $26.95. In this meticulously researched volume, part of the Moral [...]

Published
2006

29. A high efficiency photon veto for the Light Dark Matter eXperiment.

Author

Åkesson, Torsten, Blinov, Nikita, Bryngemark, Lene, Colegrove, Owen, Collura, Giulia, Dukes, Craig, Dutta, Valentina, Echenard, Bertrand, Eichlersmith, Thomas, Group, Craig, Hiltbrand, Joshua, Hitlin, David G., Incandela, Joseph, Krnjaic, Gordan, Lazaro, Juan, Li, Amina, Mans, Jeremiah, Masterson, Phillip, McCormick, Jeremy, and Moreno, Omar

Subjects
DARK matter, PHOTONS, VETO, PROPERTIES of matter, BREMSSTRAHLUNG, WEAKLY interacting massive particles
Abstract

Fixed-target experiments using primary electron beams can be powerful discovery tools for light dark matter in the sub-GeV mass range. The Light Dark Matter eXperiment (LDMX) is designed to measure missing momentum in high-rate electron fixed-target reactions with beam energies of 4 GeV to 16 GeV. A prerequisite for achieving several important sensitivity milestones is the capability to efficiently reject backgrounds associated with few-GeV bremsstrahlung, by twelve orders of magnitude, while maintaining high efficiency for signal. The primary challenge arises from events with photo-nuclear reactions faking the missing-momentum property of a dark matter signal. We present a methodology developed for the LDMX detector concept that is capable of the required rejection. By employing a detailed Geant4-based model of the detector response, we demonstrate that the sampling calorimetry proposed for LDMX can achieve better than 10−13 rejection of few-GeV photons. This suggests that the luminosity-limited sensitivity of LDMX can be realized at 4 GeV and higher beam energies. [ABSTRACT FROM AUTHOR]

Published
2020
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33. A Search for Supersymmetry in Events with Jets and Missing Momentum Using Data Collected by the CMS Detector at 13 TeV

Author

Mullin, Sam Mullin, Incandela, Joseph R1, Mullin, Sam Mullin, Mullin, Sam Mullin, Incandela, Joseph R1, and Mullin, Sam Mullin

Abstract

As successful as the Standard Model of particle physics has been it still has several major shortcomings which range from unanswered theoretical questions to a lack of any explanation for observed phenomena such as dark matter. One proposed theory for physics beyond the Standard Model which provides solutions for some of these issues is supersymmetry. This dissertation presents a search for supersymmetry using 2.3 fb^(-1) of proton-proton collision data. This data was collected at a center-of-mass energy of 13 TeV by the CMS detector at the LHC during 2015. This search focuses on top squark pair production where the produced stops both decay to an all hadronic final state. These decays are characterized by multiple jets and missing transverse momentum. A baseline search region is defined to be sensitive to signal processes which occur at rates many orders of magnitude lower than Standard Model processes. The sensitivity to various signal models is improved by dividing this baseline region into distinct categories. Events with an unreconstructed lepton from leptonic W boson decays constitute the primary background. There are also significant contributions from events where a Z boson decays invisibly to neutrinos especially in bins with higher missing transverse momentum. Events with multijet production where one jet has been severely mis-measured as well as those with a pair of top quarks and an invisibly decaying Z boson also have a small presence in the search region. The contributions from these processes to the search region is estimated using data control regions. No statistically significant deviations from the predicted background yields are observed. The results are interpreted in terms of exclusion limits using the Simplified Model Spectrum framework. Stop and neutralino masses are probed up to 780 GeV and 260 GeV respectively.

Published
2016

35. First observation of heavy baryons Sigma(b) and Sigma(b)*

Author

Aaltonen, T., Abulencia, A., OF PHYS, HELSINKI I. N. S. T., Adelman, J., Illinois, U, Urbana, ANTHONY ALLEN AFFOLDER, Chicago, U, Efi, Akimoto, T., Santa, Barbara, Albrow, MICHAEL G., Tsukuba, U, Amerio, S., Fermilab, Amidei, DANTE E., Padua, U, Anastassov, A., Michigan, U, Anikeev, K., Rutgers, U, Piscataway, Annovi, A., Antos, J., Frascati, Aoki, M., Comenius, U, Apollinari, G., Arisawa, T., Artikov, A., Waseda, U, WILLIAM JOSEPH ASHMANSKAS, Dubna, Jinr, Attal, A., Adam, Aurisano, Barcelona, Ifae, Azfar, F., Texas, A. M., AZZI BACCHETTA, P., Oxford, U, Paolo, Azzurri, Nicola, Bacchetta, Pisa, U, Badgett, W., ANGELA BARBARO GALTIERI, Barnes, V. E., Lbl, Berkeley, Barnett, BRUCE A., Purdue, U, Baroiant, S., JOHNS HOPKINS, U, Bartsch, V., Davis, Uc, Bauer, G., London, UNIVERSITY C. O. L. L., Beauchemin, P. H., Mit, Lns, Franco, Bedeschi, Mcgill, U, Behari, S., Giorgio, Bellettini, JAMES NUGENT BELLINGER, Belloni, A., Wisconsin, U, Madison, Benjamin, DOUGLAS P., Beretvas, ANDREW F., Duke, U, Juerg, Beringer, Berry, T., ANWAR AHMAD BHATTI, Liverpool, U, Morris, Binkley, Rockefeller, U, Dario, Bisello, Ilija, Bizjak, ROBERT EUGENE BLAIR, CRAIG ALAN BLOCKER, Argonne, Blumenfeld, BARRY J., Brandeis, U, Andrea, Bocci, Arie, Bodek, Veronique, Boisvert, Bolla, G., Rochester, U, Bolshov, A., Bortoletto, D., Boudreau, J., Boveia, A., Pittsburgh, U, Brau, BENJAMIN P., Luca, Brigliadori, CARL MICHAEL BROMBERG, Bologna, U, ERIK MATTHEWS BRUBAKER, MICHIGAN STATE, U, Budagov, J., Budd, H. S., SARAH REBECCA BUDD, Burkett, K., Giovanni, Busetto, Bussey, P., Buzatu, A., Glasgow, U, Byrum, K. L., Cabrera, S., Campanelli, M., Campbell, M., Geneva, U, MARIA FLORENCIA CANELLI, Canepa, A., Carillo, S., Pennsylvania, U, Carlsmith, DUNCAN L., Florida, U, Carosi, R., Carron, S., Bruno, Casal, Casarsa, M., Cantabria, U, Santander, Castro, A., Infn, Udine, Pierluigi, Catastini, Cauz, D., MATTEO CAVALLI SFORZA, Alessandro, Cerri, Lucio, Cerrito, Sanghyeon, Chang, Chen, Y. C., Kyungpook, N. A. T. L. U., MAXWELL BENJAMIN CHERTOK, Taiwan, Phys, I. N. S. T., Giorgio, Chiarelli, Chlachidze, G., Chlebana, F., Cho, I., Cho, K., Chokheli, D., Chou, J. P., Georgios, Choudalakis, Harvard, U, Chuang, S. H., Chung, K., Chung, W. H., CARNEGIE MELLON, U, YEON SEI CHUNG, Cilijak, M., CATALIN IRINEL CIOBANU, Ciocci, M. A., Clark, A., Clark, D., MIRCEA NOROCEL COCA, Compostella, G., Convery, M. E., Conway, JOHN S., Cooper, B., Katherine, Copic, Cordelli, M., Cortiana, G., Crescioli, F., CUENCA ALMENAR, C., Cuevas, J., Culbertson, RAY L., Cully, J. 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E., Pellett, A., Penzo, THOMAS J., Phillip, G., Piacentino, Jonatan, Piedra, L., Pinera, K., Pitt, Charles, Plager, Lee, Pondrom, X., Portell, O., Poukhov, N., Pounder, F., Prakoshyn, A., Pronko, James, Proudfoot, F., Ptoho, G., Punzi, JENNIFER M., Pursley, J., Rademacker, A., Rahaman, V., Ramakrishnan, N., Ranjan, I., Redondo, B., Reisert, V., Rekovic, Peter, Renton, Marco, Rescigno, S., Richter, F., Rimondi, L., Ristori, A., Robson, T., Rodrigo, E., Roger, Simona, Rolli, ROBERT M., Roser, M., Rossi, R., Rossin, P., Roy, A., Ruiz, J., Ru, V., Rusu, H., Saarikko, ALEXEI NIKOLAYEVICH, Safonov, W. K., Sakumoto, G., Salamanna, O., Salto, L., Santi, S., Sarkar, L., Sartori, K., Sato, P., Savard, A., SAVOY NAVARRO, T., Scheidle, P., Schlabach, EUGENE E., Schmidt, MICHAEL ANDREW, Schmidt, M. 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K., Teng, Koji, Terashi, RICHARD JAMES, Tesarek, Julia, Thom, ALAN STAN, Thompson, E., Thomson, PAUL LOUIS, Tipton, V., Tiwari, S., Tkaczyk, DAVID A., Toback, S., Tokar, K., Tollefson, Tomonobu, Tomura, Diego, Tonelli, S., Torre, D., Torretta, S., Tourneur, William, Trischuk, S., Tsuno, Y., Tu, N., Turini, Fumihiko, Ukegawa, S., Uozumi, S., Vallecorsa, N., VAN REMORTEL, A., Varganov, E., Vataga, ELSA FABIOLA VAZQUEZ, Valencia, G., Velev, C., Vellidi, GREGORY FRANCISCO, Veramendi, Viktor, Veszpremi, Miguel, Vidal, R., Vidal, Ivan, Vila, Rocio, Vilar, T., Vine, M., Vogel, I., Vollrath, I., Volobouev, G., Volpi, FRANK K., Wuerthwein, P., Wagner, ROBERT G., Wagner, R. L., Wagner, J., Wagner, Wolfgang, Wagner, R., Wallny, S. M., Wang, ANDREAS T., Warburton, David, Water, M., Weinberger, WILLIAM CARL, Wester, Iii, B., Whitehouse, DANIEL O., Whiteson, ARTHUR BARRY, Wicklund, ERIC J., Wicklund, G., William, H. H., William, P., Wilson, B. L., Winer, Peter, Wittich, STEPHEN A., Wolber, CARL E., Wolfe, T., Wright, X., Wu, SARA MADGE VIOLETTE, Wynne, A., Yagil, K., Yamamoto, J., Yamaoka, T., Yamashita, C., Yang, UN KI, Yang, Y. C., Yang, W. M., Yao, GONG PING, Yeh, J., Yoh, Kohei, Yorita, T., Yoshida, GEUM BONG, Yu, I., Yu, SHIN SHAN, Yu, JAE CHUL, Yun, Lucia, Zanello, ANNA MARIA, Zanetti, I., Zaw, X., Zhang, J., Zhou, S., Zucchelli, CDF Collaboration, T. Aaltonen, A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, S. Amerio, D. Amidei, A. Anastassov, K. Anikeev, A. Annovi, J. Anto, M. Aoki, G. Apollinari, T. Arisawa, A. Artikov, W. Ashmanska, A. Attal, A. Aurisano, F. Azfar, P. Azzi-Bacchetta, P. Azzurri, N. Bacchetta, W. Badgett, A. Barbaro-Galtieri, V. E. Barne, B. A. Barnett, S. Baroiant, V. Bartsch, G. Bauer, P.-H. Beauchemin, F. Bedeschi, S. Behari, G. Bellettini, J. Bellinger, A. Belloni, D. Benjamin, A. Beretva, J. Beringer, T. Berry, A. Bhatti, M. Binkley, D. Bisello, I. Bizjak, R. E. Blair, C. Blocker, B. Blumenfeld, A. Bocci, A. Bodek, V. Boisvert, G. Bolla, A. Bolshov, D. Bortoletto, J. Boudreau, A. Boveia, B. Brau, L. Brigliadori, C. Bromberg, E. Brubaker, J. Budagov, H. S. Budd, S. Budd, K. Burkett, G. Busetto, P. Bussey, A. Buzatu, K. L. Byrum, S. Cabrera16,q, M. Campanelli, M. Campbell, F. Canelli, A. Canepa, S. Carillo18,i, D. Carlsmith, R. Carosi, S. Carron, B. Casal, M. Casarsa, A. Castro, P. Catastini, D. Cauz, M. Cavalli-Sforza, A. Cerri, L. Cerrito31,m, S. H. Chang, Y. C. Chen, M. Chertok, G. Chiarelli, G. Chlachidze, F. Chlebana, I. Cho, K. Cho, D. Chokheli, J. P. Chou, G. Choudalaki, S. H. Chuang, K. Chung, W. H. Chung, Y. S. Chung, M. Cilijak, C. I. Ciobanu, M. A. Ciocci, A. Clark, D. Clark, M. Coca, G. Compostella, M. E. Convery, J. Conway, B. Cooper, K. Copic, M. Cordelli, G. Cortiana, F. Crescioli, C. Cuenca Almenar7,q, J. Cuevas11,l, R. Culbertson, J. C. Cully, S. DaRonco, M. Datta, S. D’Auria, T. Davie, D. Dagenhart, P. de Barbaro, S. De Cecco, A. Deisher, G. De Lentdecker49,c, G. De Lorenzo, M. Dell’Orso, F. Delli Paoli, L. Demortier, J. Deng, M. Deninno, D. De Pedi, P. F. Derwent, G. P. Di Giovanni, C. Dionisi, B. Di Ruzza, J. R. Dittmann, M. D’Onofrio, C. Dörr, S. Donati, P. Dong, J. Donini, T. Dorigo, S. Dube, J. Efron, R. Erbacher, D. Errede, S. Errede, R. Eusebi, H. C. Fang, S. Farrington, I. Fedorko, W. T. Fedorko, R. G. Feild, M. Feindt, J. P. Fernandez, R. Field, G. Flanagan, R. Forrest, S. Forrester, M. Franklin, J. C. Freeman, I. Furic, M. Gallinaro, J. Galyardt, J. E. Garcia, F. Garberson, A. F. Garfinkel, C. Gay, H. Gerberich, D. Gerde, S. Giagu, P. Giannetti, K. Gibson, J. L. Gimmell, C. Ginsburg, N. Giokaris15,a, M. Giordani, P. Giromini, M. Giunta, G. Giurgiu, V. Glagolev, D. Glenzinski, M. Gold, N. Goldschmidt, J. Goldstein42,b, A. Golossanov, G. Gomez, G. Gomez-Ceballo, M. Goncharov, O. González, I. Gorelov, A. T. Goshaw, K. Gouliano, A. Gresele, S. Grinstein, C. Grosso-Pilcher, R. C. Group, U. Grundler, J. Guimaraes da Costa, Z. Gunay-Unalan, C. Haber, K. Hahn, S. R. Hahn, E. Halkiadaki, A. Hamilton, B.-Y. Han, J. Y. Han, R. Handler, F. Happacher, K. Hara, D. Hare, M. Hare, S. Harper, R. F. Harr, R. M. Harri, M. Hartz, K. Hatakeyama, J. Hauser, C. Hay, M. Heck, A. Heijboer, B. Heinemann, J. Heinrich, C. Henderson, M. Herndon, J. Heuser, D. Hida, C. S. Hill10,b, D. Hirschbuehl, A. Hocker, A. Holloway, S. Hou, M. Houlden, S.-C. Hsu, B. T. Huffman, R. E. Hughe, U. Husemann, J. Huston, J. Incandela, G. Introzzi, M. Iori, A. Ivanov, B. Iyutin, E. Jame, D. Jang, B. Jayatilaka, D. Jean, E. J. Jeon, S. Jindariani, W. Johnson, M. Jone, K. K. Joo, S. Y. Jun, J. E. Jung, T. R. Junk, T. Kamon, P. E. Karchin, Y. Kato, Y. Kemp, R. Kephart, U. Kerzel, V. Khotilovich, B. Kilminster, D. H. Kim, H. S. Kim, J. E. Kim, M. J. Kim, S. B. Kim, S. H. Kim, Y. K. Kim, N. Kimura, L. Kirsch, S. Klimenko, M. Klute, B. Knuteson, B. R. Ko, K. Kondo, D. J. Kong, J. Konigsberg, A. Korytov, A. V. Kotwal, A. C. Kraan, J. 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Menzemer11,h, A. Menzione, P. Merkel, C. Mesropian, A. Messina, T. Miao, N. Miladinovic, J. Mile, R. Miller, C. Mill, M. Milnik, A. Mitra, G. Mitselmakher, A. Miyamoto, S. Moed, N. Moggi, B. Mohr, C. S. Moon, R. Moore, M. Morello, P. Movilla Fernandez, J. Mülmenstädt, A. Mukherjee, Th. Muller, R. Mumford, P. Murat, M. Mussini, J. Nachtman, A. Nagano, J. Naganoma, K. Nakamura, I. Nakano, A. Napier, V. Necula, C. Neu, M. S. Neubauer, J. Nielsen29,n, L. Nodulman, O. Norniella, E. Nurse, S. H. Oh, Y. D. Oh, I. Oksuzian, T. Okusawa, R. Oldeman, R. Orava, K. Osterberg, C. Pagliarone, E. Palencia, V. Papadimitriou, A. Papaikonomou, A. A. Paramonov, B. Park, S. Pashapour, J. Patrick, G. Pauletta, M. Paulini, C. Pau, D. E. Pellett, A. Penzo, T. J. Phillip, G. Piacentino, J. Piedra, L. Pinera, K. Pitt, C. Plager, L. Pondrom, X. Portell, O. Poukhov, N. Pounder, F. Prakoshyn, A. Pronko, J. Proudfoot, F. Ptohos19,e, G. Punzi, J. Pursley, J. Rademacker42,b, A. Rahaman, V. Ramakrishnan, N. 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Stentz, J. Strologa, D. Stuart, J. S. Suh, A. Sukhanov, H. Sun, I. Suslov, T. Suzuki, A. Taffard24,p, R. Takashima, Y. Takeuchi, R. Tanaka, M. Tecchio, P. K. Teng, K. Terashi, R. J. Tesarek, J. Thom17,d, A. S. Thompson, E. Thomson, P. Tipton, V. Tiwari, S. Tkaczyk, D. Toback, S. Tokar, K. Tollefson, T. Tomura, D. Tonelli, S. Torre, D. Torretta, S. Tourneur, W. Trischuk, S. Tsuno, Y. Tu, N. Turini, F. Ukegawa, S. Uozumi, S. Vallecorsa, N. van Remortel, A. Varganov, E. Vataga, F. Vazquez18,i, G. Velev, C. Vellidis46,a, G. Veramendi, V. Veszpremi, M. Vidal, R. Vidal, I. Vila, R. Vilar, T. Vine, M. Vogel, I. Vollrath, I. Volobouev29,o, G. Volpi, F. Würthwein, P. Wagner, R. G. Wagner, R. L. Wagner, J. Wagner, W. Wagner, R. Wallny, S. M. Wang, A. Warburton, D. Water, M. Weinberger, W. C. Wester, III, B. Whitehouse, D. Whiteson, A. B. Wicklund, E. Wicklund, G. William, H. H. William, P. Wilson, B. L. Winer, P. Wittich17,d, S. Wolber, C. Wolfe, T. Wright, X. Wu, S. M. Wynne, A. Yagil, K. Yamamoto, J. Yamaoka, T. Yamashita, C. Yang, U. K. Yang13,j, Y. C. Yang, W. M. Yao, G. P. Yeh, J. Yoh, K. Yorita, T. Yoshida, G. B. Yu, I. Yu, S. S. Yu, J. C. Yun, L. Zanello, A. Zanetti, I. Zaw, X. Zhang, J. Zhou, and S. Zucchelli

Abstract

We report an observation of new bottom baryons produced in pp̄ collisions at the Tevatron. Using 1.1fb-1 of data collected by the CDF II detector, we observe four Λb0π± resonances in the fully reconstructed decay mode Λb0→Λc+π-, where Λc+→pK-π+. We interpret these states as the Σb(*) ± baryons and measure the following masses: mΣb+=5807.8-2.2+2. 0(stat.)±1.7(syst.)MeV/c2, mΣb-=5815.2±1.0(stat.)±1. 7(syst.)MeV/c2, and m(Σb*)-m(Σb)=21.2-1.9+2.0(stat.)-0.3+0. 4(syst.)MeV/c2

Published
2007

36. The Status of CMS

Author

Incandela, Joseph R

Subjects
Physics::Instrumentation and Detectors, Physics::Accelerator Physics, High Energy Physics::Experiment, Detectors and Experimental Techniques
Abstract

After a brief overview of the Compact Muon Solenoid (CMS) experiment, the status of construction, installation and commissioning is described. Very good progress has been achieved in the past year. Though many significant challenges still lie ahead, CMS should be ready for recording data from first collisions in the Large Hadron Collider (LHC) accelerator complex at CERN in late 2007.

Published
2006

37. Observation of B0(s) - anti-B0(s) Oscillations

Author

Abulencia, A., Illinois, U, Urbana, Adelman, J., Chicago, U, Efi, ANTHONY ALLEN AFFOLDER, Santa, Barbara, Akimoto, T., Tsukuba, U, Albrow, MICHAEL G., Fermilab, Ambrose, D., Amerio, S., Padua, U, Amidei, DANTE E., Michigan, U, Anastassov, A., Rutgers, U, Piscataway, Anikeev, K., Annovi, A., Frascati, Antos, J., Taiwan, Phys, I. N. S. T., Aoki, M., Apollinari, G., JEAN FRANCOIS ARGUIN, Mcgill, U, Arisawa, T., Waseda, U, Artikov, A., Dubna, Jinr, WILLIAM JOSEPH ASHMANSKAS, Attal, A., Ucla, Azfar, F., Oxford, U, AZZI BACCHETTA, P., Paolo, Azzurri, Pisa, U, Nicola, Bacchetta, Badgett, W., ANGELA BARBARO GALTIERI, Lbl, Berkeley, Barnes, V. E., Purdue, U, Barnett, BRUCE A., JOHNS HOPKINS, U, Baroiant, S., Davis, Uc, Bartsch, V., London, UNIVERSITY C. O. L. L., Bauer, G., Mit, Franco, Bedeschi, Behari, S., Stefano, Belforte, Infn, Udine, Giorgio, Bellettini, JAMES NUGENT BELLINGER, Wisconsin, U, Madison, Belloni, A., Benjamin, DOUGLAS P., Duke, U, Beretvas, ANDREW F., Juerg, Beringer, Berry, T., Liverpool, U, ANWAR AHMAD BHATTI, Rockefeller, U, Morris, Binkley, Dario, Bisello, ROBERT EUGENE BLAIR, Argonne, CRAIG ALAN BLOCKER, Brandeis, U, Blumenfeld, BARRY J., Andrea, Bocci, Arie, Bodek, Rochester, U, Veronique, Boisvert, Bolla, G., Bolshov, A., Bortoletto, D., Boudreau, J., Pittsburgh, U, Boveia, A., Brau, BENJAMIN P., Luca, Brigliadori, Bologna, U, CARL MICHAEL BROMBERG, MICHIGAN STATE, U, ERIK MATTHEWS BRUBAKER, Budagov, J., Budd, H. S., SARAH REBECCA BUDD, Budroni, S., Burkett, K., Giovanni, Busetto, Bussey, P., Glasgow, U, Byrum, K. L., Cabrera, S., Campanelli, M., Geneva, U, Campbell, M., MARIA FLORENCIA CANELLI, Canepa, A., Carrillo, S., Florida, U, Carlsmith, DUNCAN L., Carosi, R., Carron, S., Bruno, Casal, OF PHYS, CANTABRIA I. N. S. T., Casarsa, M., Castro, A., Pierluigi, Catastini, Cauz, D., MATTEO CAVALLI SFORZA, Barcelona, Autonoma, U, Alessandro, Cerri, Lucio, Cerrito, Sanghyeon, Chang, Kyungpook, N. A. T. L. U., Chen, Y. C., MAXWELL BENJAMIN CHERTOK, Giorgio, Chiarelli, Chlachidze, G., Chlebana, F., Cho, I., Cho, K., Chokheli, D., Chou, J. P., Harvard, U, Georgios, Choudalakis, Chuang, S. H., Chung, K., CARNEGIE MELLON, U, Chung, W. H., YEON SEI CHUNG, Ciljak, M., CATALIN IRINEL CIOBANU, Ciocci, M. A., Clark, A., Clark, D., MIRCEA NOROCEL COCA, Compostella, G., Convery, M. E., Conway, JOHN S., Cooper, B., Katherine, Copic, Cordelli, M., Cortiana, G., Crescioli, F., CUENCA ALMENAR, C., Cuevas, J., Culbertson, RAY L., Cully, J. C., Cyr, D., Daronco, S., Saverio, D'Auria, Davies, T., D'Onofrio, M., WILLIAM DAVID DAGENHART, DE BARBARO, P., DE CECCO, S., Infn, Rome, Deisher, A., DE LENTDECKER, G., Mauro, Dell'Orso, DELLI PAOLI, F., Luc, Demortier, Deng, J., Deninno, M., DE PEDIS, D., Derwent, P. F., DI GIOVANNI, G. P., Paris, U, Vii, Vi, Dionisi, C., DI RUZZA, Benedetto, Dittmann, JAY R., Baylor, U, Dept, M. A. T. H., Dituro, P., Christian, Doerr, Karlsruhe, U, Ekp, Donati, S., Donega, M., Dong, P., Donini, J., Dorigo, T., Dube, S., JONATHAN ZVI EFRON, OHIO STATE, U, Erbacher, ROBIN D., Errede, D., STEVEN MICHAEL ERREDE, Ricardo, Eusebi, Fang, H. C., SINEAD MARIE FARRINGTON, Fedorko, I., Fedorko, W. T., Feild, R. G., Yale, U, Michael, Feindt, Fernandez, J. P., Madrid, Ciemat, Field, R., Flanagan, G., ANDREW DEAN FOLAND, Forrester, S., WILLIAM FOSTER, G., Franklin, M., Freeman, J. C., Frisch, HENRY J., Furic, I., Michele, Gallinaro, Galyardt, J., Garcia, J. E., Garberson, F., Garfinkel, A. F., Gay, C., Gerberich, H., Gerdes, DAVID W., Stefano, Giagu, Giannetti, P., Gibson, A., Gibson, K., JENNIFER LINDSAY GIMMELL, Ginsburg, CAMILLE M., Giokaris, N., MARIO PAOLO GIORDANI, Giromini, P., Giunta, M., Giurgiu, GAVRIL A., Glagolev, V., Glenzinski, DOUGLAS A., Gold, M., NEW MEXICO, U, NATHAN JOEL GOLDSCHMIDT, Joel, Goldstein, Gomez, G., GOMEZ CEBALLOS, G., Goncharov, MAXIM T., Texas, A. M., Gonzalez, O., Gorelov, IGOR V., Goshaw, ALFRED T., Konstantin, Goulianos, Gresele, A., Griffiths, M., Sebastian, Grinstein, GROSSO PILCHER, C., ROBERT CRAIG GROUP, Ulysses, Grundler, JOAO PEDRO BARREIRO GUIMARAES DA COSTA, GUNAY UNALAN, Z., Haber, CARL H., Hahn, K., Hahn, STEPHEN R., Halkiadakis, E., Hamilton, A., Han, B. Y., Han, J. Y., Handler, R., Happacher, F., Hara, K., Hare, M., Tufts, U, Harper, S., ROBERT FRANCIS HARR, WAYNE STATE, U, Harris, R. M., Hartz, M., Kenichi, Hatakeyama, Hauser, J., Heijboer, A., Pennsylvania, U, Heinemann, B., Joel, Heinrich, Henderson, C., Herndon, M., Heuser, J., DEAN ANDREW HIDAS, Hill, CHRISTOPHER S., Hirschbuehl, D., JAMES ANDREW HOCKER, Holloway, A., Hou, S., Houlden, MICHAEL A., Hsu, S. C., San, Diego, Huffman, BRIAN T., Hughes, R. E., Ulrich, Husemann, Huston, J., Incandela, JOSEPH R., Introzzi, G., Iori, M., Ishizawa, Y., Ivanov, A., Iyutin, B., James, ERIC B., Jang, D., BODHITHA ANJALIKE JAYATILAKA, Jeans, D., Jensen, H., Jeon, E. J., Sergo, Jindariani, Jones, M., Joo, K. K., Jun, S. Y., Jung, J. E., Junk, THOMAS R., Teruki, Kamon, Karchin, PAUL E., Kato, Y., OSAKA CITY, U, Kemp, Y., Kephart, R., Kerzel, U., Khotilovich, V., Kilminster, B., Kim, D. H., Kim, H. S., Kim, J. E., Kim, M. J., Kim, S. B., Kim, S. H., YOUNG KEE KIM, Kimura, N., Kirsch, LAWRENCE E., Sergey, Klimenko, Markus, Klute, BRUCE OWEN KNUTESON, Byeongrok, Ko, Kondo, K., DAE JUNG KONG, Jacobo, Konigsberg, Korytov, A., ASHUTOSH VIJAY KOTWAL, Kovalev, A., AAFKE CHRISTINE KRAAN, Kraus, J., Kravchenko, I., Kreps, M., Kroll, J., Krumnack, N., MARK CHARLES KRUSE, Krutelyov, VYACHESLAV E., Kubo, T., Kuhlmann, S. E., Kuhr, T., Kusakabe, Y., Kwang, S., ALVIN TOIVO LAASANEN, Lai, S., Stefano, Lami, Lammel, S., Lancaster, M., Lander, R. L., Lannon, K., Lath, A., Latino, G., Lazzizzera, I., THOMAS JOSEPH LECOMPTE, Lee, J., Lee, Y. J., SUNG WON LEE, Lefevre, R., Leonardo, NUNO T., Sandra, Leone, Levy, S., Lewis, JONATHAN D., Lin, C., CHENG JU STEPHEN LIN, MICHAEL ALLEN LINDGREN, Lipeles, E., Liss, TONY M., Lister, A., Litvintsev, D. O., Liu, T., Lockyer, NIGEL S., Loginov, A., Moscow, Itep, Maurizio, Loreti, Loverre, P., R. 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Subjects
tellurium compounds, oscillations, observation
Published
2006

49. In cyberspace, all things Catholic

Author

Incandela, Joseph M.

Subjects
Catholic Church, Information services industry -- Usage, World Wide Web -- Usage, Information services -- Usage, Humanities, Literature/writing, Political science, World Wide Web, Information services industry, Usage
Abstract

The Internet has produced what one Web site (appropriately called '.god.com') has called 'a temple without bounds.' For Catholics, especially for students and educators, the Web has put the riches [...]

Published
1997

50. Large charmless yield in B decays and inclusive B decay puzzles.

Author

Dunietz, Isard, Incandela, Joseph, Snider, Frederick, and Yamamoto, Hitoshi

Abstract

In recent studies of inclusive B decays, it has been suggested that either B mesons decay much more copiously to final states with no open charm than currently assumed, or B(D0 → K−π+) has to be reduced significantly. This note takes the experimental B(D0 → K−π+) at its face value and estimates B(b → no open charm) using complementary methods: one accounts for the c quark in b → c transitions, the other accounts for the c quark in b → ccs transitions. Through cancellation of errors, the average gives our best estimate of B(b → no open charm), and the difference measures the consistency. The results of the methods are consistent with each other, strongly suggesting a much enhanced B(b → no open charm). This observation indicates that non-perturbative QCD effects are probably causing a sizable fraction of the b → ccs transitions to be seen as charmless b → s processes, contrary to smaller traditional expectations. This mechanism has generally been overlooked and may explain the existing experimental data within the framework of the standard model. We then briefly discuss implications on baryon production governed by b → ccs processes, rare hadronic B decays and CP violation studies. [ABSTRACT FROM AUTHOR]

Published
1998
Full Text
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