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1. Discovery Potential of Future Electron-Positron Colliders for a 95 GeV Scalar

Author

Sharma, Pramod, Mulaudzi, Anza-Tshilidzi, Mosala, Karabo, Mathaha, Thuso, Kumar, Mukesh, Mellado, Bruce, Crivellin, Andreas, Titov, Maxim, Ruan, Manqi, and Fang, Yaquan

Subjects
High Energy Physics - Phenomenology
Abstract

The Large Electron Positron collider observed an indication for a new Higgs boson with a mass around $95$\,GeV-$100$\,GeV in the process $e^+e^-\to Z^*\to ZS$ with $S\to b\bar b$. The interest in this excess re-emerged with the di-photon signature at $\approx$\,95\,GeV at the Large Hadron Collider. In fact, a combined global significance of $3.4\sigma$ is obtained once $WW$ and $\tau\tau$ signals are included in addition. In this article, we perform a feasibility study for discovering such a new scalar $S$ at future electron-positron colliders using the recoil-mass method applied to $e^{+} e^{-} \to ZS$ with $Z \rightarrow \mu^{+} \mu^{-}$ and $S \to b \bar{b}$. For this, we employ a Deep Neural Network to enhance the separation between the Standard Model background and the signal, reducing the required integrated luminosity necessary for discovery by a factor of two to three. As a result, an $SU(2)_L$ singlet Higgs with a mass of $\approx$\,95\,GeV can be observed with more than 5$\sigma$ significance at a 250\,GeV centre-of-mass energy collider with $5~ {\rm ab}^{-1}$ integrated luminosity if it has a mixing angle of at least $0.1$ with the Standard Model Higgs, which means that a discovery can be achieved within the whole 95\% confidence-level region preferred by Large Electron Positron excess. Furthermore, including more decay channels such as $S\to \tau\tau$ and $Z\to e^+e^-$ further enhances the discovery potential of future $e^+e^-$ accelerators, like CEPC, CLIC, FCC-ee and ILC., Comment: 10 pages, 7 captioned figures, 1 Table

Published
2024

2. Report of the Instrumentation Frontier Working Group for Snowmass 2021

Author

Barbeau, Phillip S., Merkel, Petra, Zhang, Jinlong, Acosta, Darin, Affolder, Anthony A., Apresyan, Artur, Artuso, Marina, Bhopatkar, Vallary, Butalla, Stephen, Carini, Gabriella A., Cecil, Thomas, Connolly, Amy, Dahl, C. Eric, Deiana, Allison, Dunne, Katherine, Escobar, Carlos O., Estrada, Juan, Fahim, Farah, Fast, James E., Garcia-Sciveres, Maurice, Guenette, Roxanne, Hedges, Michael T., Irwin, Kent, Karle, Albrecht, Ketchum, Wes, Kravitz, Scott, Lippincott, W. Hugh, Maruyama, Reina H., McIver, Jess, Newcomer, F. Mitchell, Parsons, John, Pyle, Matt, Raaf, Jennifer L., Rogan, Chris, Sanchez, Mayly C., Shipsey, Ian, Surrow, Bernd, Titov, Maxim, Vahsen, Sven E., Vernieri, Caterina, White, Andrew P., Worm, Steven, Yeh, Minfang, Yohay, Rachel, and Zettlemoyer, Jacob

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

Detector instrumentation is at the heart of scientific discoveries. Cutting edge technologies enable US particle physics to play a leading role worldwide. This report summarizes the current status of instrumentation for High Energy Physics (HEP), the challenges and needs of future experiments and indicates high priority research areas. The Snowmass Instrumentation Frontier studies detector technologies and Research and Development (R&D) needed for future experiments in collider physics, neutrino physics, rare and precision physics and at the cosmic frontier. It is divided into more or less diagonal areas with some overlap among a few of them. We lay out five high-level key messages that are geared towards ensuring the health and competitiveness of the US detector instrumentation community, and thus the entire particle physics landscape., Comment: 53 pages, 0 figures, contribution to Snowmass 2021

Published
2022

3. Test-Beam and Simulation Studies Towards RPWELL-based DHCAL

Author

Shaked-Renous, Dan, Amaro, Fernando Domingues, Bhattacharya, Purba, Breskin, Amos, Chefdeville, Maximilien, Drancourt, Cyril, Geralis, Theo, Karyotakis, Yannis, Moleri, Luca, Tesi, Andrea, Titov, Maxim, Veloso, Joao, Vouters, Guillaum, and Bressler, Shikma

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

Digital Hadronic Calorimeters (DHCAL) were suggested for future Colliders as part of the particle-flow concept. Though studied mainly with Resistive Plate Chambers (RPC), studies focusing on Micro-Pattern Gaseous Detector (MPGD)-based sampling elements have shown the potential advantages; they can be operated with environmental friendly gases and reach similar detection efficiency at lower average pad-multiplicity. We summarize here the experimental test-beam results of a small-size DHCAL prototype, incorporating six Micromegas (MM) and two Resistive-Plate WELL (RPWELL) sampling elements, interlaced with steel-absorber plates. It was investigated with 2-6 GeV pion beam at the CERN/PS beam facility. The data permitted validating a GEANT4 simulation framework of a DHCAL, and evaluating the expected pion energy resolution of a full-scale RPWELL-based calorimeter. The pion energy resolution of $\frac{\sigma}{E[GeV]}=\frac{50.8\%}{\sqrt{E[GeV]}} \oplus 10.3\%$ derived expected with the RPWELL concept is competitive to that of glass RPC and MM sampling techniques.

Published
2022

4. The International Linear Collider: Report to Snowmass 2021

Author

Aryshev, Alexander, Behnke, Ties, Berggren, Mikael, Brau, James, Craig, Nathaniel, Freitas, Ayres, Gaede, Frank, Gessner, Spencer, Gori, Stefania, Grojean, Christophe, Heinemeyer, Sven, Jeans, Daniel, Kruger, Katja, List, Benno, List, Jenny, Liu, Zhen, Michizono, Shinichiro, Miller, David W., Moult, Ian, Murayama, Hitoshi, Nakada, Tatsuya, Nanni, Emilio, Nojiri, Mihoko, Padamsee, Hasan, Perelstein, Maxim, Peskin, Michael E., Poeschl, Roman, Posen, Sam, Robson, Aidan, Strube, Jan, Suehara, Taikan, Tian, Junping, Titov, Maxim, Vos, Marcel, White, Andrew, Wilson, Graham, Yokoya, Kaoru, Zarnecki, Aleksander Filip, Adachi, Ichiro, Agashe, Kaustubh, Jovin, Tatjana Agatonovic, Aihara, Hiroaki, Altmannshofer, Wolfgang, Alves, Daniele, Anguiano, Justin, Aoki, Ken-Ichi, Aoki, Masato, Aoki, Toshihiro, Aoki, Yumi, Arai, Yasuo, Araki, Hayato, Asada, Haruka, Asai, Kento, Asai, Shoji, Attie, David, Baer, Howard, Bagger, Jonathan, Bai, Yang, Bailey, Ian, Barrue, Ricardo, Bartoldus, Rainer, Barzi, Emanuela, Basso, Matthew, Bauerdick, Lothar, Baum, Sebastian, Bellerive, Alain, Belomestnykh, Sergey, Antequera, Jorge Berenguer, Beyer, Jakob, Bhat, Pushpalatha, Bilki, Burak, Black, Kevin, Bloom, Kenneth, Bodwin, Geoffrey, Boisvert, Veronique, Boran, Fatma, Boudry, Vincent, Boughezal, Radja, Boveia, Antonio, Bozovic-Jelisavcic, Ivanka, Brient, Jean-Claude, Brodsky, Stanley, Brunetti, Laurent, Buesser, Karsten, Bulyak, Eugene, Burrows, Philip N., Burt, Graeme C., Cai, Yunhai, Cairo, Valentina, Canepa, Anadi, Celiberto, Francesco Giovanni, Cenni, Enrico, Chacko, Zackaria, Chaikovska, Iryna, Checchin, Mattia, Chen, Lisong, Chen, Thomas Y., Cheng, Hsin Chia, Cho, Gi-Chol, Choudhary, Brajesh, Clarke, Jim, Cline, James, Co, Raymond, Cohen, Timothy, Colas, Paul, Damerell, Chris, Das, Arindam, Dasu, Sridhara, Dawson, Sally, de Blas, Jorge, de Lima, Carlos Henrique, Deandrea, Aldo, Dehmelt, Klaus, Delayen, Jean, Demarteau, Marcel, Denisov, Dmitri, Dermisek, Radovan, Dieguez, Angel, Dohmae, Takeshi, Dopke, Jens, Dort, Katharina, Du, Yong, Dudar, Bohdan, Dutta, Bhaskar, Dutta, Juhi, Einhaus, Ulrich, Elsen, Eckhard, Endo, Motoi, Eremeev, Grigory, Eren, Engin, Erler, Jens, Esarey, Eric, Everett, Lisa, Golfe, Angeles Faus, Garcia, Marcos Fernandez, Foster, Brian, Fourches, Nicolas, Fouz, Mary-Cruz, Fujii, Keisuke, Fujimoto, Junpei, Torregrosa, Esteban Fullan, Furukawa, Kazuro, Fusayasu, Takahiro, Fuster, Juan, Ganjour, Serguei, Gao, Yuanning, Gaur, Naveen, Geng, Rongli, Georgi, Howard, Gherghetta, Tony, Goldstein, Joel, Goncalves, Dorival, Gonski, Julia, Gonzalo, Tomas, Goto, Takeyoshi, Goto, Toru, Graf, Norman, Grames, Joseph, Grannis, Paul, Gray, Lindsey, Grohsjean, Alexander, Gu, Jiayin, Guler, Yalcin, Gutierrez, Phillip, Haba, Junji, Haber, Howard, Hallford, John, Hamaguchi, Koichi, Han, Tao, Hara, Kazuhiko, Harada, Daisuke, Hashimoto, Koji, Hashino, Katsuya, Hayashi, Masahito, Heinrich, Gudrun, Hidaka, Keisho, Higuchi, Takeo, Hinode, Fujio, Hioki, Zenro, Hirose, Minoru, Hiroshima, Nagisa, Hisano, Junji, Hollik, Wolfgang, Homiller, Samuel, Hong, Sungwoo, Hook, Anson, Horii, Yasuyuki, Hoshina, Hiroki, Hristova, Ivana, Huitu, Katri, Hyakutake, Yoshifumi, Iijima, Toru, Ikematsu, Katsumasa, Ilderton, Anton, Inami, Kenji, Irles, Adrian, Ishikawa, Akimasa, Ishiwata, Koji, Ito, Hayato, Ivanov, Igor, Iwamoto, Sho, Iwamoto, Toshiyuki, Iwasaki, Masako, Iwashita, Yoshihisa, Jia, Haoyi, Morales, Fabricio Jimenez, Joshi, Prakash, Jung, Sunghoon, Kacarevic, Goran, Kagan, Michael, Kakizaki, Mitsuru, Kalinowski, Jan, Kaminski, Jochen, Kanaya, Kazuyuki, Kanemura, Shinya, Kanno, Hayato, Kano, Yuya, Kashiwagi, Shigeru, Kato, Yukihiro, Kawada, Nanami, Kawada, Shin-ichi, Kawagoe, Kiyotomo, Khoze, Valery, Kichimi, Hiromichi, Kim, Doojin, Kitahara, Teppei, Kitano, Ryuichiro, Klamka, Jan, Komamiya, Sachio, Kong, K. C., Konomi, Taro, Kotera, Katsushige, Kou, Emi, Kravchenko, Ilya, Kubo, Kiyoshi, Kubo, Takayuki, Kumaoka, Takuya, Kumar, Ashish, Kumar, Nilanjana, Kunath, Jonas, Kundu, Saumyen, Kunitomo, Hiroshi, Kurata, Masakazu, Kuriki, Masao, Kusenko, Alexander, Lagouri, Theodota, Lankford, Andrew J., Lastovicka-Medin, Gordana, Diberder, Francois Le, Lee, Claire, Liepe, Matthias, Linacre, Jacob, Liptak, Zachary, Lomte, Shivani, Low, Ian, Ma, Yang, Maalouf, Hani, MacFarlane, David, Madison, Brendon, Madlener, Thomas, Maeda, Tomohito, Malek, Paul, Mandal, Sanjoy, Markiewicz, Thomas, Marshall, John, Martens, Aurelien, Martin, Victoria, Martinello, Martina, Rivero, Celso Martinez, Maru, Nobuhito, Matheson, John, Matsumoto, Shigeki, Matsunaga, Hiroyuki, Matsuo, Yutaka, Mawatari, Kentarou, Mbagwu, Johnpaul, McIntosh, Peter, McKeown, Peter, Meade, Patrick, Mekala, Krzysztof, Merkel, Petra, Mihara, Satoshi, Miralles, Víctor, Lopez, Marcos Miralles, Mishima, Go, Mishima, Satoshi, Mistlberger, Bernhard, Mitov, Alexander, Miyabayashi, Kenkichi, Miyamoto, Akiya, Mohanty, Gagan, Monaco, Laura, Mondragon, Myriam, Montgomery, Hugh E., Moortgat-Pick, Gudrid, Morange, Nicolas, Llacer, María Moreno, Moretti, Stefano, Mori, Toshinori, Morii, Toshiyuki, Moroi, Takeo, Morrissey, David, Nachman, Benjamin, Nagano, Kunihiro, Nakajima, Jurina, Nakamura, Eiji, Narita, Shinya, Nath, Pran, Nelson, Timothy, Newbold, David, Niki, Atsuya, Nishimura, Yasuhiro, Nishiyama, Eisaku, Nomura, Yasunori, Nowak, Kacper, Nozaki, Mitsuaki, de Vera, María Teresa Nunez Pardo, Ochoa, Ines, Ogata, Masahito, Ohashi, Satoru, Ohta, Hikaru, Ohta, Shigemi, Ohuchi, Norihito, Oide, Hideyuki, Okada, Nobuchika, Okada, Yasuhiro, Okawa, Shohei, Okayasu, Yuichi, Okugawa, Yuichi, Okugi, Toshiyuki, Okui, Takemichi, Okuyama, Yoshitaka, Omet, Mathieu, Omori, Tsunehiko, Ono, Hiroaki, Onoe, Tomoki, Ootani, Wataru, Otono, Hidetoshi, Ozawa, Shuhei, Griso, Simone Pagan, Papa, Alessandro, Paparella, Rocco, Park, Eun-Kyung, Perez, Gilad, Perez-Lorenzana, Abdel, Peters, Yvonne, Petriello, Frank, Piedra, Jonatan, Porod, Werner, Potter, Christopher, Price, Alan, Radkhorrami, Yasser, Reina, Laura, Reuter, Juergen, Richard, Francois, Riemann, Sabine, Rimmer, Robert, Rizzo, Thomas, Robens, Tania, Ruber, Roger, Jimeno, Alberto Ruiz, Saeki, Takayuki, Saha, Ipsita, Saito, Tomoyuki, Sakaguchi, Makoto, Sakai, Tadakatsu, Sakaki, Yasuhito, Sakurai, Kodai, Salvatico, Riccardo, Salvatore, Fabrizio, San, Yik Chuen, Sandick, Pearl, Sanuki, Tomoyuki, Sasikumar, Kollassery Swathi, Schaefer, Oliver, Schaefer, Ruth, Schneekloth, Uwe, Schoerner-Sadenius, Thomas, Schroeder, Carl, Schuster, Philip, Schwartzman, Ariel, Schwienhorst, Reinhard, Sefkow, Felix, Seiya, Yoshihiro, Sekiguchi, Motoo, Sekizawa, Kazuyuki, Senyo, Katsumi, Sert, Hale, Sertore, Danielev, Settles, Ronald, Shafi, Qaisar, Shahdara, Tetsuo, Haghi, Barmak Shams Es, Sharma, Ashish, Shelton, Jessie, Shepherd-Themistocleous, Claire, Shibuya, Hiroto, Shidara, Tetsuo, Shimomura, Takashi, Shindou, Tetsuo, Shoji, Yutaro, Shu, Jing, Sievers, Ian, Simon, Frank, Singh, Rajeev, Soreq, Yotam, Stanitzki, Marcel, Stapnes, Steinar, Steinhebel, Amanda, Stupak, John, Su, Shufang, Suekane, Fumihiko, Sugamoto, Akio, Sugawara, Yuji, Sugimoto, Satoru, Sugimoto, Yasuhiro, Sugiyama, Hiroaki, Sumino, Yukinari, Sundrum, Raman, Suzuki, Atsuto, Suzuki, Shin, Swiatlowski, Maximilian, Tait, Tim M. P., Takahashi, Shota, Takahashi, Tohru, Takeshita, Tohru, Takeuchi, Michihisa, Takubo, Yosuke, Tanabe, Tomohiko, Tanedo, Philip, Tanimoto, Morimitsu, Tao, Shuichiro, Tata, Xerxes, Tauchi, Toshiaki, Taylor, Geoffrey, Terada, Takahiro, Terunuma, Nobuhiro, Thaler, Jesse, Thea, Alessandro, Tillinger, Finn, Timmermans, Jan, Tobioka, Kohsaku, Toda, Kouichi, Tokiyasu, Atsushi, Toma, Takashi, Torndal, Julie, Tosun, Mehmet, Tsai, Yu-Dai, Tseng, Shih-Yen, Tsumura, Koji, Tuckler, Douglas, Uchida, Yoshiki, Uchiyama, Yusuke, Ueda, Daiki, Ukegawa, Fumihiko, Umemori, Kensei, Urakawa, Junji, Vallee, Claude, Vega, Roberto, Velasco, Liliana, Verdu-Andres, Silvia, Vernieri, Caterina, Vila, Anna, Alvarez, Ivan Vila, Vossebeld, Joost, Vsrms, Raghava, Vukasinovic, Natasa, Wackeroth, Doreen, Wakida, Moe, Wang, Liantao, Washio, Masakazu, Watanabe, Takashi, Watson, Nigel, Watts, Gordon, Weiglein, Georg, Wells, James D., Wenskat, Marc, Westhoff, Susanne, White, Glen, Williams, Ciaran, Willocq, Stephane, Wing, Matthew, Winter, Alasdair, Winter, Marc, Wu, Yongcheng, Xie, Keping, Xu, Tao, Yakovlev, Vyacheslav, Yamada, Shuei, Yamamoto, Akira, Yamamoto, Hitoshi, Yamamoto, Kei, Yamamoto, Yasuchika, Yamanaka, Masato, Yamashita, Satoru, Yamatani, Masahiro, Yamatsu, Naoki, Yasui, Shigehiro, Yoda, Takuya, Yonamine, Ryo, Yoshihara, Keisuke, Yoshioka, Masakazu, Yoshioka, Tamaki, Yuasa, Fukuko, Yumino, Keita, Zerwas, Dirk, Zheng, Ya-Juan, Zhou, Jia, Zhu, Hua Xing, Zobov, Mikhail, and Zomer, Fabian

Subjects
Physics - Accelerator Physics, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our current understanding of particle physics. It is based on a proven accelerator technology. Its experiments will challenge the Standard Model of particle physics and will provide a new window to look beyond it. This document brings the story of the ILC up to date, emphasizing its strong physics motivation, its readiness for construction, and the opportunity it presents to the US and the global particle physics community., Comment: 356 pages, Large pdf file (40 MB) submitted to Snowmass 2021; v2 references to Snowmass contributions added, additional authors; v3 references added, some updates, additional authors

Published
2022

5. MPGDs for TPCs at future lepton colliders

Author

Bellerive, Alain, Kaminski, Jochen, Lewis, Peter M., Colas, Paul, Diener, Ralf, Kluit, Peter, Settles, Ronald Dean, Timmermans, Jan, Titov, Maxim, Centeno, Andreas Loschcke, Wessel, Christian, Hartbrich, Oskar, Vahsen, Sven, Marinas, Carlos, Qi, Huiron, and Zhang, Zhiyong

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

This submission will focus on advancements and advantages of Micro Pattern Gas Detector (MPGD) technologies and their applications to the construction of a dedicated Time Projection Chamber (TPC) that can serve as an excellent main tracker for any multipurpose detector that can be foreseen to operate at a future lepton collider. The first portion of the report will be the executive summary. It will be followed by sections detailing the applications of MPGDs specifically to the construction of the LCTPC for the ILD at ILC, for a possible upgrade of the Belle II detector at SuperKEKB and for the design of a TPC for a detector at CEPC. MPGD technologies offer synergies with other detector R&D and several application domains; a few examples will be provided in the context of the ongoing Snowmass long range planning exercise in the USA. Links to industrial partnership and work with institutions in the USA will be highlighted when appropriate., Comment: Contribution to Snowmass 2021. And on behalf of the LCTPC Collaboration

Published
2022

6. Next Frontiers in Particle Physics Detectors: INSTR2020 Summary and a Look into the Future

Author

Titov, Maxim

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

The physics goals of high luminosity particle accelerators, from LHC to HL-LHC and to the next generation of lepton colliders, have set quite stringent constraints on the future needs at the Instrumentation Frontier. Many technologies are reaching their sensitivity limit and new approaches need to be developed to overcome the currently irreducible technological challenges. The timescales spanned by future projects in particle physics, ranging from few years to many decades, constitute a challenge in itself, in addition to the complexity and diversity of the required accelerator and detector R&D. This paper summarizes advances and recent trends in the instrumentation techniques for particle physics experiments, largely based on the presentations given at the International Conference "Instrumentation for Colliding Beam Physics" (INSTR-20), held at BINP Novosibirsk, Russia, from 24 to 28 February, 2020., Comment: 45 pages, 17 figures. This paper summarizes advances and recent trends in the instrumentation techniques for particle physics experiments, largely based on the presentations given at the International Conference "Instrumentation for Colliding Beam Physics" (INSTR-20), held at BINP Novosibirsk, Russia, from 24 to 28 February, 2020

Published
2020
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7. Lunar PNT system concept and simulation results

Author

Kaplev Sergey, Titov Maxim, Valentirova Tamara, Mozharov Igor, Bolkunov Alexei, and Yaremchuk Valeriy

Subjects
lunar navigation, lunar frozen orbits, on-board odts, orbital group time scale, lunar beacons, Astronomy, QB1-991
Abstract

The revived interest of many countries and the growing number of ongoing and scheduled missions to the Moon increases the significance of supporting navigation system development. A number of publications are based on multi-Global Navigation Satellite System (GNSS) signal reception from the opposite side of the Earth using high-gain antennas and lunar augmentation constellations. While the accuracy of such systems could be sufficient, the positioning, navigation, and timing (PNT) service dependency on circumterestrial navigation sources prevents the use of advanced navigation technologies honed in circumlunar space for further Mars and other celestial body missions, which is one of the major goals of lunar exploration. Moreover, orbit determination and time synchronization (ODTS) method descriptions and estimations are usually skipped in the studies of lunar augmentations. An alternative concept of the Lunar Navigation Satellite System (LNSS) is proposed based on Earth-dependency reduction principal and on-board ODTS. The advantage of the proposed approach is that LNSS-like systems could be adapted for other celestial bodies taking into account aspects such as their shape, dynamics, perturbations, as well as exploration priority regions. The baseline LNSS constellation of three circular orbits with three satellites each has been chosen as the result of multicriterion analysis of orbital stability and geometry. Station keeping requires less than 15 m/s for 10 years without significant changes in navigation performance in the prioritized Polar Regions. The full cycle of LNSS operation from ODTS and signal generation to its reception, processing, and obtaining navigation solutions has been simulated to obtain positioning accuracy for different types of users. Positioning accuracy of space users in approach/departure phases, in near-lunar orbits, as well as static users on a lunar surface is confirmed on a level of a few tens of meters. The same accuracy is achievable by dynamic users on a lunar surface during route stops or also in motion in case of LNSS constellation expansion or deployment of ground-based augmentation beacons in on-site exploration zones.

Published
2022
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8. Perspectives of Micro-Pattern Gaseous Detector Technologies for Future Physics Projects

Author

Titov, Maxim

Subjects
Physics - Instrumentation and Detectors
Abstract

A centenary after the invention of the basic principle of gas amplification, gaseous detectors - are still the first choice whenever the large area coverage with low material budget is required. Advances in photo-lithography and micro-processing techniques in the chip industry during the past two decades triggered a major transition in the field of gas detectors from wire structures to Micro-Pattern Gas Detector (MPGD) concepts, revolutionizing cell-size limitations for many gas detector applications. The high radiation resistance and excellent spatial and time resolution make them an invaluable tool to confront future detector challenges at the frontiers of research. The design of the new micro-pattern devices appears suitable for industrial production. In 2008, the RD51 collaboration at CERN has been established to further advance technological developments of MPGDs and associated electronic-readout systems, for applications in basic and applied research. This review provides an overview of the state-of-the-art of the MPGD technologies and summarizes recent activities for the next generation of colliders within the framework of the RD51 collaboration., Comment: Proceedings of the CMS Workshop, Perspectives on Physics and on CMS at Very High Luminosity, May 2012, Alushta, Ukraine

Published
2013

9. Gaseous Detectors: recent developments and applications

Author

Titov, Maxim

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

Since long time, the compelling scientific goals of future high energy physics experiments were a driving factor in the development of advanced detector technologies. A true innovation in detector instrumentation concepts came in 1968, with the development of a fully parallel readout for a large array of sensing elements - the Multiwire Proportional Chamber (MWPC), which earned Georges Charpak a Nobel prize in physics in 1992. Since that time radiation detection and imaging with fast gaseous detectors, capable of economically covering large detection volume with low mass budget, have been playing an important role in many fields of physics. Advances in photo-lithography and micro-processing techniques in the chip industry during the past decade triggered a major transition in the field of gas detectors from wire structures to Micro-Pattern Gas Detector (MPGD) concepts, revolutionizing cell size limitations for many gas detector applications. The high radiation resistance and excellent spatial and time resolution make them an invaluable tool to confront future detector challenges at the next generation of colliders. The design of the new micro-pattern devices appears suitable for industrial production. Novel structures where MPGDs are directly coupled to the CMOS pixel readout represent an exciting field allowing timing and charge measurements as well as precise spatial information in 3D. Originally developed for the high energy physics, MPGD applications has expanded to nuclear physics, UV and visible photon detection, astroparticle and neutrino physics, neutron detection and medical physics., Comment: 23 pages, 13 figures, Invited Lectures at the 2009 Trans-European School of High Energy Physics, Zakopane, Poland, July 8-14(2009)

Published
2010

10. New Developments and Future Perspectives of Gaseous Detectors

Author

Titov, Maxim

Subjects
Physics - Instrumentation and Detectors
Abstract

Gaseous detectors are fundamental components of all present and planned high energy physics experiments. Over the past decade two representatives (GEM, Micromegas) of the Micro-Pattern Gas Detector (MPGD) concept have become increasingly important; the high radiation resistance and excellent spatial and time resolution make them an invaluable tool to confront future detector challenges at the next generation of colliders. Novel structures where GEM and Micromegas are directly coupled to the CMOS multi-pixel readout represent an exciting field and allow to reconstruct fine-granularity, two-dimensional images of physics events. Originally developed for the high energy physics, MPGD applications have expanded to astrophysics, neutrino physics, neutron detection and medical imaging., Comment: CEA SACLAY, DAPNIA, France and Albert-Ludwigs-University of Freiburg. Invited Plenary Talk at the 2007 Vienna Instrumentation Conference, February 19-24, 2007

Published
2007
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11. SUSY Multilepton Signatures at Tevatron

Author

Titov, Maxim

Subjects
High Energy Physics - Experiment
Abstract

One of the most striking signature of supersymmetric models with electroweak symmetry breaking is the presence of multilepton event topologies in the decay products. In this paper searches are presented for physics beyond the Standard Model (SM) in final states containing charged leptons from proton-antiproton collision data at a center-of-mass energy of 1.96 TeV, collected with Run II CDF and D{\O}Detectors in 2002-2006, and corresponding to integrated luminosities of up to 1.1 fb$^{-1}$. In any of the searches no excess of candidates was observed with respect to the SM predictions and limits on masses and production cross-sections are set at the 95 % CL., Comment: Albert-Ludwigs University of Freiburg, Germany (on behalf of the CDF and D0 Collaborations). Prepared for Aspen Winter Conference "New Physics at the Electroweak Scale and New Signals at Hadron Colliders", January 8-14, 2007

Published
2007

12. Search for Leptoquarks and Compositeness at D0

Author

Titov, Maxim

Subjects
High Energy Physics - Experiment
Abstract

In this paper searches are presented for the pair production of first and second generation scalar leptoquarks and limits are given on the quark-lepton compositeness scale from proton-antiproton collision data at a center-of-mass energy 1.96 TeV, collected with Run II D0 Detector in 2002-2004. No evidence for a leptoquark signal has been observed. From the upper bounds on the product of cross section times branching ratio beta=Br(LQ to lj), a lower mass limits of M(LQ1) > 241 GeV and M(LQ2) > 247 GeV for the first and second LQ generation are set for beta=1. These results, combined with those obtained by D0 in Run I at a center-of-mass energy of 1.8 TeV, allow to exclude scalar LQ masses up to 256 GeV and 251 GeV (for beta=1) for the first and second generation, respectively. The dilepton mass spectra in pp -> l+l-+X interactions are studied using dielectron (dimuon) data samples, corresponding to an integrated luminosity of 271 pb-1 (406 pb-1). The mass spectra being a probe for new physics are examined for new interactions of quarks and leptons from a common composite structure. No excess of events is found over the expectation from Standard Model processes. The current experimental lower limits on the compositeness scale vary, for different chirality channels, from 3.6 to 9.1 TeV for the (eeqq) and from 4.2 to 9.8 TeV for the (mumuqq) contact interaction., Comment: Presented at the 2005 International Europhysics Conference on High Energy Physics (EPS2005), Lissabon, Portugal, 21-27 July 2005

Published
2005

13. Radiation Damage and Long-Term Aging in Gas Detectors

Author

Titov, Maxim

Subjects
Physics - Instrumentation and Detectors
Abstract

Aging phenomena constitute one of the most complex and serious potential problems which could limit, or severely impair, the use of gaseous detectors in unprecedented harsh radiation environments. Long-term operation in high-intensity experiments of the LHC-era not only demands extraordinary radiation hardness of construction materials and gas mixtures but also very specific and appropriate assembly procedures and quality checks during detector construction and testing. Recent experimental data from hadron beams is discussed. It is shown that the initial stage of radiation tests, usually performed under isolated laboratory conditions, may not offer the full information needed to extrapolate to the long-term performance of real and full-size detectors at high energy physics facilities. Major factors, closely related to the capability of operating at large localized ionization densities, and which could lead to operation instabilities and subsequent aging phenomena in gaseous detectors, are summarized. Finally, an overview of aging experience with state-of-the-art gas detectors in experiments with low- and high-intensity radiation environments is given with a goal of providing a set of rules, along with some caveat, for the construction and operation of gaseous detectors in high luminosity experiments., Comment: 19 pages, 6 figures. Presented at the 42nd workshop of the INFN ELOISATRON Project 'Innovative Detector for Supercolliders', September 28 - October 4 (2003), Erice, Italy

Published
2004
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14. MPGD2015: Low-energy electron source to characterize Micromegas/InGrid and study of dE/dx for low energy electrons

Author

Attie David, Barsuk Sergey, Bezshyyko Oleg, Burmistrov Leonid, Chaus Andrii, Colas Paul, Fedorchuk Oleksii, Golinka-Bezshyyko Larisa, Haranko Mykyta, Krylov Vladyslav, Kubytskyi Viacheslav, Lopez Roberto, Monard Hugues, Sukhonos Daniil, Titov Maxim, Tomassini Davide, Variola Alessandro, and Rodin Volodymyr

Subjects
Physics, QC1-999
Abstract

Insert your english abstract here.A new versatile facility LEETECH for detector R&D, tests and calibration is designed and constructed. It uses electrons produced by the photoinjector PHIL at LAL, Orsay and provides a powerful tool for wide range R&D studies of different detector concepts delivering “monochromatic” samples of low energy electrons with adjustable energy and intensity. Among other innovative instrumentation techniques, LEETECH will be used for testing various gaseous tracking detectors and studying new Micromegas/InGrid concept which has very promising characteristics of spatial resolution and can be a good candidate for particle tracking and identification. In this paper the importance and expected characteristics of such facility based on detailed simulation studies are addressed.

Published
2018
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15. The International Large Detector: Letter of Intent

Author

Abe, Toshinori, Abernathy, Jason M., Abramowicz, Halina, Adamus, Marek, Adeva, Bernardo, Afanaciev, Konstantin, Aguilar-Saavedra, Juan Antonio, Alabau Pons, Carmen, Albrecht, Hartwig, Andricek, Ladislav, Anduze, Marc, Aplin, Steve J., Arai, Yasuo, Asano, Masaki, Attie, David, Attree, Derek J., Burger, Jochen, Bailey, David, Balbuena, Juan Pablo, Ball, Markus, Ballin, James, Barbi, Mauricio, Barlow, Roger, Bartels, Christoph, Bartsch, Valeria, Bassignana, Daniela, Bates, Richard, Baudot, Jerome, Bechtle, Philip, Beck, Jeannine, Beckmann, Moritz, Bedjidian, Marc, Behnke, Ties, Belkadhi, Khaled, Bellerive, Alain, Bentvelsen, Stan, Bergauer, Thomas, Berggren, C.Mikael U., Bergholz, Matthias, Bernreuther, Werner, Besancon, Marc, Besson, Auguste, Bhattacharya, Sudeb, Bhuyan, Bipul, Biebel, Otmar, Bilki, Burak, Blair, Grahame, Blumlein, Johannes, Bo, Li, Boisvert, Veronique, Bondar, A., Bonvicini, Giovanni, Boos, Eduard, Boudry, Vincent, Bouquet, Bernard, Bouvier, Joel, Bozovic-Jelisavcic, Ivanka, Brient, Jean-Claude, Brock, Ian, Brogna, Andrea, Buchholz, Peter, Buesser, Karsten, Bulgheroni, Antonio, Butler, John, Buttar, Craig, Buzulutskov, A.F., Caccia, Massimo, Caiazza, Stefano, Calcaterra, Alessandro, Caldwell, Allen, Callier, Stephane L.C., Calvo Alamillo, Enrique, Campbell, Michael, Campbell, Alan J., Cappellini, Chiara, Carloganu, Cristina, Castro, Nuno, Castro Carballo, Maria Elena, Chadeeva, Marina, Chakraborty, Dhiman, Chang, Paoti, Charpy, Alexandre, Chen, Xun, Chen, Shaomin, Chen, Hongfang, Cheon, Byunggu, Choi, Suyong, Choudhary, B.C., Christen, Sandra, Ciborowski, Jacek, Ciobanu, Catalin, Claus, Gilles, Clerc, Catherine, Coca, Cornelia, Colas, Paul, Colijn, Auke, Colledani, Claude, Combaret, Christophe, Cornat, Remi, Cornebise, Patrick, Corriveau, Francois, Cvach, Jaroslav, Czakon, Michal, D'Ascenzo, Nicola, Da Silva, Wilfrid, Dadoun, Olivier, Dam, Mogens, Damerell, Chris, Danilov, Mikhail, Daniluk, Witold, Daubard, Guillaume, David, Dorte, David, Jacques, De Boer, Wim, De Groot, Nicolo, De Jong, Sijbrand, De Jong, Paul, De La Taille, Christophe, De Masi, Rita, De Roeck, Albert, Decotigny, David, Dehmelt, Klaus, Delagnes, Eric, Deng, Zhi, Desch, Klaus, Dieguez, Angel, Diener, Ralf, Dima, Mihai-Octavian, Dissertori, Gunther, Dixit, Madhu S., Dolezal, Zdenek, Dolgoshein, Boris A., Dollan, Ralph, Dorokhov, Andrei, Doublet, Philippe, Doyle, Tony, Doziere, Guy, Dragicevic, Marko, Drasal, Zbynek, Drugakov, Vladimir, Duarte Campderros, Jordi, Dulucq, Frederic, Dumitru, Laurentiu Alexandru, Dzahini, Daniel, Eberl, Helmut, Eckerlin, Guenter, Ehrenfeld, Wolfgang, Eigen, Gerald, Eklund, Lars, Elsen, Eckhard, Elsener, Konrad, Emeliantchik, Igor, Engels, Jan, Evrard, Christophe, Fabbri, Riccardo, Faber, Gerard, Faucci Giannelli, Michele, Faus-Golfe, Angeles, Feege, Nils, Feng, Cunfeng, Ferencei, Jozef, Fernandez Garcia, Marcos, Filthaut, Frank, Fleck, Ivor, Fleischer, Manfred, Fleta, Celeste, Fleury, Julien L., Fontaine, Jean-Charles, Foster, Brian, Fourches, Nicolas, Fouz, Mary-Cruz, Frank, Sebastian, Frey, Ariane, Frotin, Mickael, Fujii, Hirofumi, Fujii, Keisuke, Fujimoto, Junpei, Fujita, Yowichi, Fusayasu, Takahiro, Fuster, Juan, Gaddi, Andrea, Gaede, Frank, Galkin, Alexei, Galkin, Valery, Gallas, Abraham, Gallin-Martel, Laurent, Gamba, Diego, Gao, Yuanning, Garrido Beltran, Lluis, Garutti, Erika, Gastaldi, Franck, Gaur, Bakul, Gay, Pascal, Gellrich, Andreas, Genat, Jean-Francois, Gentile, Simonetta, Gerwig, Hubert, Gibbons, Lawrence, Ginina, Elena, Giraud, Julien, Giraudo, Giuseppe, Gladilin, Leonid, Goldstein, Joel, Gonzalez Sanchez, Francisco Javier, Gournaris, Filimon, Greenshaw, Tim, Greenwood, Z.D., Grefe, Christian, Gregor, Ingrid-Maria, Grenier, Gerald Jean, Gris, Philippe, Grondin, Denis, Grunewald, Martin, Grzelak, Grzegorz, Gurtu, Atul, Haas, Tobias, Haensel, Stephan, Hajdu, Csaba, Hallermann, Lea, Han, Liang, Hansen, Peter H., Hara, Takanori, Harder, Kristian, Hartin, Anthony, Haruyama, Tomiyoshi, Harz, Martin, Hasegawa, Yoji, Hauschild, Michael, He, Qing, Hedberg, Vincent, Hedin, David, Heinze, Isa, Helebrant, Christian, Henschel, Hans, Hensel, Carsten, Hertenberger, Ralf, Herve, Alain, Higuchi, Takeo, Himmi, Abdelkader, Hironori, Kazurayama, Hlucha, Hana, Hommels, Bart, Horii, Yasuyuki, Horvath, Dezso, Hostachy, Jean-Yves, Hou, Wei-Shu, Hu-Guo, Christine, Huang, Xingtao, Huppert, Jean Francois, Ide, Yasuhiro, Idzik, Marek, Iglesias Escudero, Carmen, Ignatenko, Alexandr, Igonkina, Olga, Ikeda, Hirokazu, Ikematsu, Katsumasa, Ikemoto, Yukiko, Ikuno, Toshinori, Imbault, Didier, Imhof, Andreas, Imhoff, Marc, Ingbir, Ronen, Inoue, Eiji, Ioannis, Giomataris, Ishikawa, Akimasa, Itagaki, Kennosuke, Ito, Kazutoshi, Itoh, Hideo, Iwabuchi, Masaya, Iwai, Go, Iwamoto, Toshiyuki, Jacosalem, Editha P., Jaramillo Echeverria, Richard, Jeans, Daniel T D., Jing, Fanfan, Jing, Ge, Jokic, Stevan, Jonsson, Leif, Jore, Matthieu, Jovin, Tatjana, Kafer, Daniela, Kajino, Fumiyoshi, Kamai, Yusuke, Kaminski, Jochen, Kamiya, Yoshio, Kaplan, Alexander, Kapusta, Frederic, Kar, Deepak, Karlen, Dean, Katayama, Nobu, Kato, Eriko, Kato, Yukihiro, Kaukher, Alexander, Kawagoe, Kiyotomo, Kawahara, Hiroki, Kawai, Masanori, Kawasaki, Takeo, Khan, Sameen Ahmed, Kieffer, Robert, Kielar, Eryk, Kiesenhofer, Wolfgang, Kiesling, Christian M., Killenberg, Martin, Kim, Donghee, Kim, Choong Sun, Kim, Guinyun, Kim, Hong Joo, Kim, Eun-Joo, Kim, Hyunok, Kim, Shinhong, Kircher, Francois, Kisielewska, Danuta, Kleinwort, Claus, Klimkovich, Tatsiana, Kluge, Hanna, Kluit, Peter Martin, Kobayashi, Makoto, Kobel, Michael, Kodama, Hideyo, Kodys, Peter, Koetz, U., Koffeman, Els, Kohriki, Takashi, Komamiya, Sachio, Kondou, Yoshinari, Korbel, Volker, Kotera, Katsushige, Krucker, Dirk, Kraml, Sabine, Krammer, Manfred, Krastev, Kaloyan, Krause, Bernward, Krautscheid, Thorsten, Kschioneck, Kirsten, Kuang, Yu-Ping, Kuhlmann, Jan, Kuroiwa, Hirotoshi, Kusano, Tomonori, Kvasnicka, Peter, Lacasta Llacer, Carlos, Lagorio, Eric, Laktineh, Imad, Lange, Wolfgang, Lebrun, Patrice, Lee, Jik, Lehner, Frank, Lesiak, Tadeusz, Levy, Aharon, Li, Bo, Li, Ting, Li, Yulan, Li, Hengne, Liang, Zuotang, Lima, Guilherme, Linde, Frank, Linssen, Lucie, Linzmaier, Diana, List, Benno, List, Jenny, Liu, Bo, Llopart Cudie, Xavier, Lohmann, Wolfgang, Lopez Virto, Amparo, Lozano, Manuel, Lu, Shaojun, Lucaci-Timoce, Angela Isabela, Lumb, Nick, Lundberg, Bjorn, Lutz, Pierre, Lutz, Benjamin, Lux, Thorsten, Luzniak, Pawel, Lyapin, Alexey, Ma, Wengan, Maczewski, Lukasz, Mader, Wolfgang F., Maity, Manas, Majumdar, Nayana, Majumder, Gobinda, Maki, Akihiro, Makida, Yasuhiro, Mamuzic, Judita, Marc, Dhellot, Marchesini, Ivan, Marcisovsky, Michal, Marias, Carlos, Marshall, John, Martens, Cornelius, Martin, Victoria J., Martin, Jean-Pierre, Martin-Chassard, Gisele, Martinez Rivero, Celso, Martyn, Hans-Ulrich, Mathez, Herve, Mathieu, Antoine, Matsuda, Takeshi, Matsunaga, Hiroyuki, Matsushita, Takashi, Mavromanolakis, Georgios, Mcdonald, Kirk T., Mereu, Paolo, Merk, Marcel, Merkin, Mikhail M., Meyer, Niels, Meyners, Norbert, Mihara, Satoshi, Miller, David J., Miller, Owen, Mitaroff, Winfried A., Miyamoto, Akiya, Miyata, Hitoshi, Mjornmark, Ulf, Mnich, Joachim, Monig, Klaus, Moll, Andreas, Moortgat-Pick, Gudrid A., Mora De Freitas, Paulo, Morel, Frederic, Moretti, Stefano, Morgunov, Vasily, Mori, Toshinori, Mori, Takashi, Morin, Laurent, Morozov, Sergey, Moser, Hans-Gunther, Moser, Fabian, Moya, David, Mudrinic, Mihajlo, Mukhopadhyay, Supratik, Murakami, Takeshi, Musa, Luciano, Musat, Gabriel, Nagamine, Tadashi, Nakamura, Isamu, Nakano, Eiichi, Nakashima, Kenichi, Nakayoshi, Kazuo, Nakazawa, Hideyuki, Nam, Shinwoo, Nam, Jiwoo, Nemecek, Stanislav, Niebuhr, Carsten, Niechciol, Marcus, Niezurawski, Piotr, Nishida, Shohei, Nishiyama, Miho, Nitoh, Osamu, Norbeck, Ed, Nozaki, Mitsuaki, O'Shea, Val, Ohlerich, Martin, Okada, Nobuchika, Olchevski, Alexander, Olivier, Bob, Oliwa, Krzysztof, Omori, Tsunehiko, Onel, Yasar, Ono, Hiroaki, Ono, Yoshimasa, Onuki, Yoshiyuki, Ootani, Wataru, Orava, Risto, Orlandea, Marius Ciprian, Oskarsson, Anders, Osland, Per, Ossetski, Dmitri, Osterman, Lennart, Padilla, Cristobal, Pandurovic, Mila, Park, Il Hung, Park, Hwanbae, Parkes, Chris, Patrick, Ghislain, Patterson, J.Ritchie, Pawlik, Bogdan, Pellegrini, Giulio, Pellegrino, Antonio, Peterson, Daniel, Petrov, Alexander, Pham, Thanh Hung, Piccolo, Marcello, Poeschl, Roman, Polak, Ivo, Popova, Elena, Postranecky, Martin, Prahl, Volker, Prudent, Xavier, Przysiezniak, Helenka, Puerta-Pelayo, Jesus, Qian, Wenbin, Quadt, Arnulf, Rarbi, Fatah-Ellah, Raspereza, Alexei, Ratti, Lodovico, Raux, Ludovic, Raven, Gerhard, Re, Valerio, Regler, Meinhard, Reinhard, Marcel, Renz, Uwe, Repain, Philippe, Repond, Jose, Richard, Francois, Riemann, Sabine, Riemann, Tord, Riera-Babures, Jordi, Riu, Imma, Robert, Kieffer, Robson, Aidan, Roloff, Philipp, Rosca, Aura, Rosemann, Christoph, Rosiek, Janusz, Rossmanith, Robert, Roth, Stefan, Royon, Christophe, Ruan, Manqi, Ruiz-Jimeno, Alberto, Rusinov, Vladimir, Ruzicka, Pavel, Ryzhikov, Dmitri, Saborido, Juan J., Sadeh, Iftach, Sailer, Andre, Saito, Masatoshi, Sakuma, Takayuki, Sanami, Toshiya, Sanuki, Tomoyuki, Sarkar, Sandip, Sasaki, Rei, Sato, Yutaro, Saveliev, Valeri, Savoy-Navarro, Aurore, Sawyer, Lee, Schafer, Oliver, Schalicke, Andreas, Schuler, K.Peter, Schade, Peter, Schaffran, Joern, Scheirich, Jan, Schlatter, Dieter, Schmidt, Ringo Sebastian, Schmitt, Sebastian, Schneekloth, Uwe, Schreiber, Heinz Juergen, Schultz-Coulon, Hans-Christian, Schumacher, Markus, Schumm, Bruce A., Schuwalow, Sergej, Schwierz, Rainer, Sefkow, Felix, Sefri, Rachid, Seguin-Moreau, Nathalie, Seidel, Katja, Sekaric, Jadranka, Sendai, Hiroshi, Settles, Ronald Dean, Shao, Ming, Shechtman, L.I., Shimazaki, Shoichi, Shumeiko, Nikolai, Sicho, Petr, Simon, Frank, Sinram, Klaus, Smiljanic, Ivan, Smiljkovic, Nebojsa, Smolik, Jan, Sobloher, Blanka, Soldner, Christian, Song, Kezhu, Sopczak, Andre, Speckmayer, Peter, Stenlund, Evert, Stockinger, Dominik, Stoeck, Holger, Strohmer, Raimund, Straessner, Arno, Stromhagen, Richard, Sudo, Yuji, Suehara, Taikan, Suekane, Fumihiko, Suetsugu, Yusuke, Sugimoto, Yasuhiro, Sugiyama, Akira, Sumisawa, Kazutaka, Suzuki, Shiro, Swientek, Krzysztof, Tabassam, Hajrah, Takahashi, Tohru, Takeda, Hiroshi, Takeshita, Tohru, Takubo, Yosuke, Tanabe, Tomohiko, Tanaka, Shuji, Tanaka, Ken-Ichi, Tanaka, Manobu, Tapprogge, Stefan, Tarkovsky, Evgueny I., Tauchi, Toshiaki, Tauchi, Kazuya, Telnov, Valery I., Teodorescu, Eliza, Thomson, Mark, Tian, Junping, Timmermans, Jan, Titov, Maxim P., Tokushuku, Katsuo, Tozuka, Shunsuke, Tsuboyama, Toru, Ueno, Koji, Ullan, Miguel, Uozumi, Satoru, Urakawa, Junji, Ushakov, Andriy, Ushiroda, Yutaka, Valentan, Manfred, Valin, Isabelle, Van Der Graaf, Harry, Van Doren, Brian, Van Kooten, Rick J., Vander Donckt, Muriel, Vanel, Jean-Charles, Vazquez Regueiro, Pablo, Verzocchi, Marco, Vescovi, Christophe, Videau, Henri L., Vila, Ivan, Vilasis-Cardona, Xavier, Vogel, Adrian, Volkenborn, Robert, Vos, Marcel, Voutsinas, Yorgos, Vrba, Vaclav, Vreeswijk, Marcel, Walsh, Roberval, Waltenberger, Wolfgang, Wang, Min-Zu, Wang, Yi, Wang, Xiaoliang, Wang, Qun, Wang, Meng, Ward, David R., Warren, Matthew, Watanabe, Minori, Watanabe, Takashi, Watson, Nigel K., Wattimena, Nanda, Wendt, Oliver, Wermes, Norbert, Weuste, Lars, Wichmann, Katarzyna, Wienemann, Peter, Wierba, Wojciech, Wilson, Graham W., Wilson, John A., Wing, Matthew, Winter, Marc, Wobisch, Markus, Worek, Malgorzata, Xella, Stefania, Xu, Zizong, Yamaguchi, Akira, Yamaguchi, Hiroshi, Yamamoto, Hitoshi, Yamaoka, Hiroshi, Yamashita, Satoru, Yamauchi, M., Yamazaki, Yuji, Yamouni, Mahfoud, Yan, Wenbiao, Yanagida, Koji, Yang, Haijun, Yang, Jongmann, Yang, Jin Min, Yang, Zhenwei, Yasu, Yoshiji, Yonamine, Ryo, Yoshida, Kohei, Yoshida, Takuo, Yoshioka, Tamaki, Yu, Chunxu, Yu, Intae, Yue, Qian, Zacek, Josef, Zalesak, Jaroslav, Zarnecki, Aleksander Filip, Zawiejski, Leszek, Zeitnitz, Christian, Zerwas, Dirk, Zeuner, Wolfram, Zhang, Yanxi, Zhang, Ziping, Zhang, Renyou, Zhang, Xueyao, Zhang, Zhiqing, Zhao, Jiawei, Zhao, Zhengguo, Zheng, Baojun, Zhong, Liang, Zhou, Yongzhao, Zhu, Xianglei, Zhu, Chengguang, Zomer, Fabian, and Zutshi, Vishnu

Subjects
Physics, Particle physics, Time projection chamber, Large Hadron Collider, International Linear Collider, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, Particle accelerator, Magnetic detector, 01 natural sciences, law.invention, law, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, 010306 general physics, Particle Physics - Experiment, Lepton, Event reconstruction
Abstract

The International Large Detector (ILD) is a concept for a detector at the International Linear Collider, ILC. The ILC will collide electrons and positrons at energies of initially 500 GeV, upgradeable to 1 TeV. The ILC has an ambitious physics program, which will extend and complement that of the Large Hadron Collider (LHC). A hallmark of physics at the ILC is precision. The clean initial state and the comparatively benign environment of a lepton collider are ideally suited to high precision measurements. To take full advantage of the physics potential of ILC places great demands on the detector performance. The design of ILD is driven by these requirements. Excellent calorimetry and tracking are combined to obtain the best possible overall event reconstruction, including the capability to reconstruct individual particles within jets for particle ow calorimetry. This requires excellent spatial resolution for all detector systems. A highly granular calorimeter system is combined with a central tracker which stresses redundancy and efficiency. In addition, efficient reconstruction of secondary vertices and excellent momentum resolution for charged particles are essential for an ILC detector. The interaction region of the ILC is designed to host two detectors, which can be moved into the beam position with a push-pull scheme. The mechanical design of ILD and the overall integration of subdetectors takes these operational condition s into account. The International Large Detector (ILD) is a concept for a detector at the International Linear Collider, ILC. The ILC will collide electrons and positrons at energies of initially 500 GeV, upgradeable to 1 TeV. The ILC has an ambitious physics program, which will extend and complement that of the Large Hadron Collider (LHC). A hallmark of physics at the ILC is precision. The clean initial state and the comparatively benign environment of a lepton collider are ideally suited to high precision measurements. To take full advantage of the physics potential of ILC places great demands on the detector performance. The design of ILD is driven by these requirements. Excellent calorimetry and tracking are combined to obtain the best possible overall event reconstruction, including the capability to reconstruct individual particles within jets for particle ow calorimetry. This requires excellent spatial resolution for all detector systems. A highly granular calorimeter system is combined with a central tracker which stresses redundancy and efficiency. In addition, efficient reconstruction of secondary vertices and excellent momentum resolution for charged particles are essential for an ILC detector. The interaction region of the ILC is designed to host two detectors, which can be moved into the beam position with a push-pull scheme. The mechanical design of ILD and the overall integration of subdetectors takes these operational conditions into account.

Published
2010
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16. Limits for the central production of Θ+ and Ξ−− pentaquarks in 920-GeV pA collisions

Author

Abt, Iris, Adams, Mark Raymond, Agari, Michaela, Albrecht, Hartwig, Aleksandrov, A., Amaral, Vasco, Amorim, Antonio, Aplin, Steven, Aushev, Volodymyr, Bagaturia, Iuri, Balagura, Vladislav, Bargiotti, Marianne, Barsukova, O., Bastos, Joao Afonso, Batista, Joao Miguel Nobre, Bauer, Christian, Bauer, Thomas S., Belkov, Ar, Belkov, Ar., Belotelov, I., Bertin, A., Bobchenko, B., Böcker, M., Bogatyrev, A., Bohm, G., Bräuer, M., Bruinsma, M., Bruschi, M., Buchholz, P., Buran, T., Carvalho, J., Conde, P., Cruse, C., Dam, M., Danielsen, K. M., Danilov, M., De Castro, S., Deppe, H., Dong, X., Dreis, H. B., Egorytchev, V., Ehret, K., Eisele, F., Emeliyanov, D., Essenov, S., Fabbri, L., Faccioli, P., Feuerstack-Raible, M., Flammer, J., Fominykh, B., Funcke, M., Garrido Beltran, Lluís, Giacobbe, B., Gläß, J., Goloubkov, D., Golubkov, Y., Golutvin, A., Golutvin, I., Gorbounov, I., Gorisek, A., Gouchtchine, O., Goulart, D. C., Gradl, S., Gradl, W., Grimaldi, F., Groth-Jensen, J., Guilitsky, Yu., Hansen, J. D., Hernandez, J. M., Hofmann, W., Hott, T., Hulsbergen, W., Husemann, U., Igonkina, O., Ispiryan, M., Jagla, T., Jiang, C., Kapitza, H., Karabekyan, S., Karpenko, N., Keller, S., Kessler, J., Khasanov, F., Kiryushin, Yu., Klinkby, E., Knöpfle, K. T., Kolanoski, H., Korpar, S., Krauss, C., Kreuzer, P., Krizan, P., Krücker, D., Kupper, S., Kvaratskheliia, T., Lanyov, A., Lau, K., Lewendel, B., Lohse, T., Lomonosov, B., Männer, R., Masciocchi, S., Massa, I., Matchikhilian, I., Medin, G., Medinnis, M., Mevius, M., Michetti, A., Mikhailov, Yu., Mizuk, R., Muresan, R., Negodaev, M., Nörenberg, M., Nowak, S., Nuñez Pardo de Vera, M. T., Ouchrif, M., Ould-Saada, F., Padilla, Cristobal, Peralta, D., Pernack, R., Pestotnik, R., Piccinini, M., Pleier, Marc-Andre, Poli, M., Popov, V., Pose, A., Pose, D., Prystupa, S., Pugatch, V. M., Pylypchenko, Y., Pyrlik, J., Reeves, K., Reßing, D., Rick, H., Riu, I., Robmann, P., Rostovtseva, I., Rybnikov, V., Sánchez Nieto, Federico, Sbrizzi, A., Schmelling, M., Schmidt, B., Schreiner, A., Schröder, H., Schwartz, Alan J., Schwarz, Andreas S., Schwenninger, B., Schwingenheuer, B., Sciacca, F., Semprini-Cesari, N., Shuvalov, S., Silva, L., Smirnov, K., Solunin, S., Somov, A., Somov, S., Sözüer, L., Spengler, J., Spighi, R., Spiridonov, A., Stanovnik, A., Staric, M., Stegmann, C., Subramania, H. S., Symalla, M., Tikhomirov, I., Titov, Maxim P., Tsakov, I., Uwer, U., Vassiliev, Yu, Villa, M., Vitale, A., Vukotic, I., Wahlberg, H., Walenta, A. H., Walter, M., Wang, J. J., Wegener, D., Werthenbach, U., Wolters, H., Wurth, R., Wurz, A., Zaitsev, Yu., Zavertyaev, M., Zech, Gunter, Zeuner, T., Zhelezov, A., Zheng, Z., Zimmermann, R., Zivko, T., Zoccoli, A., van Eldik, C., and Zur Nedden, M

Abstract

We have searched for Θ+(1540) and Ξ−−(1862) pentaquark candidates in proton-inducedreactions on C, Ti, and W targets at midrapidity and s√=41.6 GeV. In 2×108 inelastic eventswe find no evidence for narrow (σ≈5 MeV) signals in the Θ+→pK0S and Ξ−−→Ξ−π− channels; our 95% C.L. upper limits (UL) forthe inclusive production cross section times branching fraction B dσ/dy $y ≈0 are (4-16) μb/N for a Θ+ mass between 1521 and 1555 MeV,and 2.5μb/N for the Ξ−−. The UL of the yield ratio of Θ+/Λ(1520)

Published
2004

17. Inclusive $\mathrm{V^0}$ production cross sections from 920 GeV fixed target proton-nucleus collisions

Author

Abt, I., Abyzov, A., Aushev, V., Harr, R., Hast, C., Hausmann, S., Hernandez, J. M., Hildebrandt, M., Holscher, A., Hoepfner, K., Hofmann, W., Hohlmann, M., Hott, T., Bagaturiya, Yu., Hulsbergen, W., Husemann, U., Igonkina, O., Ispirian, M., Issever, S., Itterbeck, H., Ivarsson, J., Jagla, T., Jia, Y., Jiang, C., Baghshetsyan, R., Kaoukher, A., Kapitza, H., Karabekian, S., Karchin, P., Karpenko, N., Ke, Z., Keller, S., Khasanov, F., Kim, H., Kiryushin, Yu., Balagura, V., Kisel, I., Klefenz, F., Knopfle, K. T., Kochetkov, V., Kolanoski, H., Korpar, S., Krauss, C., Kreuzer, P., Krizan, P., Krucker, D., Bargiotti, M., Kvaratskheliya, T., Lange, Arnd, Lanyov, A., Lau, K., Leffers, G., Legrand, I., Lewendel, B., Liu, Y. Q., Lohse, T., Loke, R., Barsuk, S., Lomonosov, B., Ludemann, J., Manner, R., Mankel, R., Marconi, U., Masciocchi, S., Massa, I., Matchikhilian, I., Medin, G., Medinnis, M., Barsukova, O., Mevius, M., Michetti, A., Mikhailov, Yu., Miquel, R., Mizuk, R., Mohapatra, A., Moshkin, A., Moshous, B., Muresan, R., Nam, S., Bassetti, V., Negodaev, M., Negri, I., Norenberg, M., Nowak, S., Nunez Pardo de Vera, M. T., Oest, T., Oliveira, A., Ouchrif, M., Ould-Saada, F., Padilla, C., Bastos, J., Pakhlov, P., Pavlenko, Yu., Peralta, D., Pernack, R., Perschke, T., Pestotnik, R., Petersen, B. A., Piccinini, M., Pleier, Marc-Andre, Poli, M., Bauer, C., Popov, V., Pose, A., Pose, D., Potashnikova, I., Pugatch, V. M., Pylypchenko, Y., Pyrlik, J., Ramachandran, S., Ratnikov, F., Reeves, K., Adams, M., Bauer, T. S., Ressing, D., Riechmann, K., Rieling, J., Rietz, M., Riu, I., Robmann, P., Rosen, J., Rothe, C., Ruckstuhl, W., Rusinov, V., Beck, M., Rybnikov, V., Ryzhikov, D., Saadi-Ludemann, F., Samtleben, D., Sanchez, F., Sang, M., Savelev, V., Sbrizzi, A., Schaller, S., Schlein, P., Belkov, A., Schmelling, M., Schmidt, B., Schmidt, S., Schmidt-Parzefall, W., Schreiner, A., Schroder, H., Schultz, H. D., Schwanke, U., Schwartz, Alan J., Schwarz, Andreas S., Belotelov, I., Schwenninger, B., Schwingenheuer, B., Schwitters, R., Sciacca, F., Semenov, S., Semprini-Cesari, N., Sexauer, E., Seybold, L., Shiu, J., Shuvalov, S., Belyaev, I., Siccama, I., Skrk, D., Sozuer, L., Soldatov, A., Solunin, S., Somov, A., Somov, S., Suvorov, V., Spahn, M., Spengler, J., Berkhan, K., Spighi, R., Spiridonov, A., Spratte, S., Stanovnik, A., Staric, M., St. Denis, Richard Dante, Stegmann, C., Steinbeck, S., Steinkamp, O., Stieler, D., Bertin, A., Straumann, U., Sun, F., Sun, H., Symalla, M., Takach, S., Tesch, N., Thurn, H., Tikhomirov, I., Titov, Maxim P., Trunk, U., Bobchenko, B., Truoel, Peter, Tsakov, I., Uwer, U., Vagnoni, V., van Eldik, C., van Staa, R., Vasilev, Yu., Villa, M., Vitale, A., Vukotic, I., Bocker, M., Wagner, G., Wagner, W., Wahlberg, H., Walenta, A. H., Walter, M., Walter, T., Wang, J. J., Wang, Y. M., Wanke, R., Wegener, D., Bogatyrev, A., Werthenbach, U., Weyers, P. J., Wolters, H., Wurth, R., Wurz, A., Xella Hansen, S., Yang, J., Zaitsev, Yu., Zavertyaev, M., Zech, Gunter, Albrecht, H., Bohm, G., Zeuner, T., Zhelezov, A., Zheng, Z., Zhu, Z., Zimmermann, R., Zivko, T., Zoccoli, A., Zweizig, J., HERA-B Collaboration, Borgmeier, C., Brauer, M., Broemmelsiek, D., Bruinsma, M., Bruschi, M., Buchholz, P., Buchler, M., Buran, T., Capeans, M., Amaral, V., Capponi, M., Carvalho, J., Chamanina, J., Chen, B. X., Chistov, R., Chmeissani, M., Christensen, A., Conde, P., Cruse, C., Dam, M., Amorim, A., Danielsen, K. M., Danilov, M., De Castro, S., Deckers, H., Dehmelt, K., Deppe, H., Dolgoshein, B., Dong, X., Dreis, H. B., Dressel, M., Aplin, S. J., Dujmic, D., Eckmann, R., Egorychev, V., Ehret, K., Eiges, V., Eisele, F., Emelyanov, D., Erhan, S., Essenov, S., Fabbri, L., Arefev, A., Faccioli, P., Fallot-Burghardt, W., Feuerstack-Raible, M., Flammer, J., Fleckenstein, H., Fominykh, B., Fourletov, S., Fuljahn, T., Funcke, M., Galli, D., Arino, I., Garcia, A., Garrido, L., Gascon, D., Gellrich, A., Gerndt, K. E. K., Giacobbe, B., Glass, J., Glebe, T., Goloubkov, D., Golutvin, A., Atiya, M., Golutvin, I., Gorbunov, I., Gorisek, A., Gouchtchine, O., Goulart, D. C., Gradl, S., Gradl, W., Gilitsky, Yu., Hamacher, T., and Hansen, J. D.

Subjects
Lambda, tungsten, carbon, Antilambda, x-dependence [differential cross section], transverse momentum dependence, HERA-B, ratio [differential cross section], DESY HERA Stor, aluminum, K0(S), ddc:530, hadroproduction [strange particle], titanium, mass number [channel cross section], 920 GeV, inclusive reaction [p nucleus], experimental results
Abstract

Inclusive differential cross sections $d\sigma_{pA}/dx_F$ and $d\sigma_{pA}/dp_t^2$ for the production of \kzeros, \lambdazero, and \antilambda particles are measured at HERA in proton-induced reactions on C, Al, Ti, and W targets. The incident beam energy is 920 GeV, corresponding to $\sqrt {s} = 41.6$ GeV in the proton-nucleon system. The ratios of differential cross sections \rklpa and \rllpa are measured to be $6.2\pm 0.5$ and $0.66\pm 0.07$, respectively, for \xf $\approx-0.06$. No significant dependence upon the target material is observed. Within errors, the slopes of the transverse momentum distributions $d\sigma_{pA}/dp_t^2$ also show no significant dependence upon the target material. The dependence of the extrapolated total cross sections $\sigma_{pA}$ on the atomic mass $A$ of the target material is discussed, and the deduced cross sections per nucleon $\sigma_{pN}$ are compared with results obtained at other energies.

Published
2003
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18. Limits for the central production of Θ+ and Ξ−− pentaquarks in 920-GeV pA collisions

Author

Abt, I., Adams, Maurice Lawrence, Agari, M., Albrecht, H., Aleksandrov, A., Amaral, V., Amorim, A., Aplin, S. J., Aushev, V., Bagaturia, Y., Balagura, V., Bargiotti, M., Barsukova, O., Bastos, J., Batista, J., Bauer, C., Bauer, Th.S., Belkov, A., Belkov, Ar., Belotelov, I., Bertin, A., Bobchenko, B., Böcker, M., Bogatyrev, A., Bohm, G., Bräuer, M., Bruinsma, M., Bruschi, M., Buchholz, P., Buran, T., Carvalho, J., Conde, P., Cruse, C., Dam, M., Danielsen, K. M., Danilov, M., De Castro, S., Deppe, H., Dong, X., Dreis, H. B., Egorytchev, V., Ehret, K., Eisele, F., Emeliyanov, D., Essenov, S., Fabbri, L., Faccioli, P., Feuerstack-Raible, M., Flammer, J., Fominykh, B., Funcke, M., Garrido, Ll., Giacobbe, B., Gläß, J., Goloubkov, D., Golubkov, Y., Golutvin, A., Golutvin, I., Gorbounov, I., Gorisek, A., Gouchtchine, O., Goulart, D. C., Gradl, S., Gradl, W., Grimaldi, F., Groth-Jensen, J., Guilitsky, Yu., Hansen, J. D., Hernandez, J. M., Hofmann, W., Hott, T., Hulsbergen, W., Husemann, U., Igonkina, O., Ispiryan, M., Jagla, T., Jiang, C., Kapitza, H., Karabekyan, S., Karpenko, N., Keller, S., Kessler, J., Khasanov, F., Kiryushin, Yu., Klinkby, E., Knöpfle, K. T., Kolanoski, H., Korpar, S., Krauss, C., Kreuzer, P., Krizan, P., Krücker, D., Kupper, S., Kvaratskheliia, T., Lanyov, A., Lau, K., Lewendel, B., Lohse, T., Lomonosov, B., Männer, R., Masciocchi, S., Massa, I., Matchikhilian, I., Medin, G., Medinnis, M., Mevius, M., Michetti, A., Mikhailov, Yu., Mizuk, R., Muresan, R., Negodaev, M., Nörenberg, M., Nowak, S., Nuñez Pardo de Vera, M. T., Ouchrif, M., Ould-Saada, F., Padilla, C., Peralta, D., Pernack, R., Pestotnik, R., Piccinini, M., Pleier, Marc-Andre, Poli, M., Popov, V., Pose, A., Pose, D., Prystupa, S., Pugatch, V. M., Pylypchenko, Y., Pyrlik, J., Reeves, K., Reßing, D., Rick, H., Riu, I., Robmann, P., Rostovtseva, I., Rybnikov, V., Sánchez Nieto, Federico, Sbrizzi, A., Schmelling, M., Schmidt, B., Schreiner, A., Schröder, H., Schwartz, Alan J., Schwarz, Andreas S., Schwenninger, B., Schwingenheuer, B., Sciacca, F., Semprini-Cesari, N., Shuvalov, S., Silva, L., Smirnov, K., Solunin, S., Somov, A., Somov, S., Sözüer, L., Spengler, J., Spighi, R., Spiridonov, A., Stanovnik, A., Staric, M., Stegmann, C., Subramania, H. S., Symalla, M., Tikhomirov, I., Titov, Maxim P., Tsakov, I., Uwer, U., Vassiliev, Yu, Villa, M., Vitale, A., Vukotic, I., Wahlberg, H., Walenta, A.H., Walter, M., Wang, J. J., Wegener, D., Werthenbach, U., Wolters, H., Wurth, R., Wurz, A., Zaitsev, Yu., Zavertyaev, M., Zech, Gunter, Zeuner, T., Zhelezov, A., Zheng, Z., Zimmermann, R., Zivko, T., Zoccoli, A., van Eldik, C., zur Nedden, M., Abt, I., Adams, Maurice Lawrence, Agari, M., Albrecht, H., Aleksandrov, A., Amaral, V., Amorim, A., Aplin, S. J., Aushev, V., Bagaturia, Y., Balagura, V., Bargiotti, M., Barsukova, O., Bastos, J., Batista, J., Bauer, C., Bauer, Th.S., Belkov, A., Belkov, Ar., Belotelov, I., Bertin, A., Bobchenko, B., Böcker, M., Bogatyrev, A., Bohm, G., Bräuer, M., Bruinsma, M., Bruschi, M., Buchholz, P., Buran, T., Carvalho, J., Conde, P., Cruse, C., Dam, M., Danielsen, K. M., Danilov, M., De Castro, S., Deppe, H., Dong, X., Dreis, H. B., Egorytchev, V., Ehret, K., Eisele, F., Emeliyanov, D., Essenov, S., Fabbri, L., Faccioli, P., Feuerstack-Raible, M., Flammer, J., Fominykh, B., Funcke, M., Garrido, Ll., Giacobbe, B., Gläß, J., Goloubkov, D., Golubkov, Y., Golutvin, A., Golutvin, I., Gorbounov, I., Gorisek, A., Gouchtchine, O., Goulart, D. C., Gradl, S., Gradl, W., Grimaldi, F., Groth-Jensen, J., Guilitsky, Yu., Hansen, J. D., Hernandez, J. M., Hofmann, W., Hott, T., Hulsbergen, W., Husemann, U., Igonkina, O., Ispiryan, M., Jagla, T., Jiang, C., Kapitza, H., Karabekyan, S., Karpenko, N., Keller, S., Kessler, J., Khasanov, F., Kiryushin, Yu., Klinkby, E., Knöpfle, K. T., Kolanoski, H., Korpar, S., Krauss, C., Kreuzer, P., Krizan, P., Krücker, D., Kupper, S., Kvaratskheliia, T., Lanyov, A., Lau, K., Lewendel, B., Lohse, T., Lomonosov, B., Männer, R., Masciocchi, S., Massa, I., Matchikhilian, I., Medin, G., Medinnis, M., Mevius, M., Michetti, A., Mikhailov, Yu., Mizuk, R., Muresan, R., Negodaev, M., Nörenberg, M., Nowak, S., Nuñez Pardo de Vera, M. T., Ouchrif, M., Ould-Saada, F., Padilla, C., Peralta, D., Pernack, R., Pestotnik, R., Piccinini, M., Pleier, Marc-Andre, Poli, M., Popov, V., Pose, A., Pose, D., Prystupa, S., Pugatch, V. M., Pylypchenko, Y., Pyrlik, J., Reeves, K., Reßing, D., Rick, H., Riu, I., Robmann, P., Rostovtseva, I., Rybnikov, V., Sánchez Nieto, Federico, Sbrizzi, A., Schmelling, M., Schmidt, B., Schreiner, A., Schröder, H., Schwartz, Alan J., Schwarz, Andreas S., Schwenninger, B., Schwingenheuer, B., Sciacca, F., Semprini-Cesari, N., Shuvalov, S., Silva, L., Smirnov, K., Solunin, S., Somov, A., Somov, S., Sözüer, L., Spengler, J., Spighi, R., Spiridonov, A., Stanovnik, A., Staric, M., Stegmann, C., Subramania, H. S., Symalla, M., Tikhomirov, I., Titov, Maxim P., Tsakov, I., Uwer, U., Vassiliev, Yu, Villa, M., Vitale, A., Vukotic, I., Wahlberg, H., Walenta, A.H., Walter, M., Wang, J. J., Wegener, D., Werthenbach, U., Wolters, H., Wurth, R., Wurz, A., Zaitsev, Yu., Zavertyaev, M., Zech, Gunter, Zeuner, T., Zhelezov, A., Zheng, Z., Zimmermann, R., Zivko, T., Zoccoli, A., van Eldik, C., and zur Nedden, M.

Abstract

We have searched for Θ+(1540) and Ξ−−(1862) pentaquark candidates in proton-inducedreactions on C, Ti, and W targets at midrapidity and s√=41.6 GeV. In 2×108 inelastic eventswe find no evidence for narrow (σ≈5 MeV) signals in the Θ+→pK0S and Ξ−−→Ξ−π− channels; our 95% C.L. upper limits (UL) forthe inclusive production cross section times branching fraction B dσ/dy $y ≈0 are (4-16) μb/N for a Θ+ mass between 1521 and 1555 MeV,and 2.5μb/N for the Ξ−−. The UL of the yield ratio of Θ+/Λ(1520)<(3-12)% is significantly lower than model predictions.Our UL of B Ξ−−/Ξ(1530)0<4% is at variance with the results that have provided the first evidencefor the Ξ−−.

Published
2004

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