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  1. Article: The HEV Ventilator Proposal

    Buytaert, J. / Abud, A. Abed / Akiba, K. / Bay, A. / Bertella, C. / Bowcock, T. / Byczynski, W. / Coco, V. / Collins, P. / Francisco, O. Augusto De Aguiar / Dikic, N. / Dumps, R. / Durante, P. / Prieto, A. Fern'andez / Lima, V. Franco / Guida, R. / Hennessy, K. / Hutchcroft, D. / Ilic, S. /
    Jevtic, A. / Kapusniak, K. / Cid, E. Lemos / Lindner, J. / Milovanovic, M. / Murray, D. / Nasteva, I. / Neufeld, N. / Pons, X. / Sanders, F. / Schwemmer, R. / Svihra, P.

    Abstract: We propose the design of a ventilator which can be easily manufactured and integrated into the hospital environment to support COVID-19 patients. The unit is designed to support standard ventilator modes of operation, most importantly PRVC (Pressure ... ...

    Abstract We propose the design of a ventilator which can be easily manufactured and integrated into the hospital environment to support COVID-19 patients. The unit is designed to support standard ventilator modes of operation, most importantly PRVC (Pressure Regulated Volume Control) and SIMV-PC (Synchronised Intermittent Mandatory Ventilation) modes. The unit is not yet an approved medical device and is in the concept and prototyping stage. It is presented here to invite fast feedback for development and deployment in the face of the COVID-19 pandemic.
    Keywords covid19
    Publisher ArXiv
    Document type Article
    Database COVID19

    Kategorien

  2. Book ; Online: The HEV Ventilator Proposal

    Buytaert, J. / Abud, A. Abed / Akiba, K. / Bay, A. / Bertella, C. / Bowcock, T. / Byczynski, W. / Coco, V. / Collins, P. / Francisco, O. Augusto De Aguiar / Dikic, N. / Dumps, R. / Durante, P. / Prieto, A. Fernández / Lima, V. Franco / Guida, R. / Hennessy, K. / Hutchcroft, D. / Ilic, S. /
    Jevtic, A. / Kapusniak, K. / Cid, E. Lemos / Lindner, J. / Milovanovic, M. / Murray, D. / Nasteva, I. / Neufeld, N. / Pons, X. / Sanders, F. / Schwemmer, R. / Svihra, P.

    2020  

    Abstract: We propose the design of a ventilator which can be easily manufactured and integrated into the hospital environment to support COVID-19 patients. The unit is designed to support standard ventilator modes of operation, most importantly PRVC (Pressure ... ...

    Abstract We propose the design of a ventilator which can be easily manufactured and integrated into the hospital environment to support COVID-19 patients. The unit is designed to support standard ventilator modes of operation, most importantly PRVC (Pressure Regulated Volume Control) and SIMV-PC (Synchronised Intermittent Mandatory Ventilation) modes. The unit is not yet an approved medical device and is in the concept and prototyping stage. It is presented here to invite fast feedback for development and deployment in the face of the COVID-19 pandemic.

    Comment: 14 pages, 5 figures
    Keywords Physics - Medical Physics ; covid19
    Publishing date 2020-04-01
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: The HEV Ventilator

    Buytaert, J. / Abud, A. Abed / Allport, P. / 'Alvarez, A. Pazos / Akiba, K. / Francisco, O. Augusto de Aguiar / Bay, A. / Bernard, F. / Baron, S. / Bertella, C. / Brunner, J. / Bowcock, T. / Jode, M. Buytaert-De / Byczynski, W. / Carvalho, R. De / Coco, V. / Collins, P. / Collins, R. / Dikic, N. /
    Dousse, N. / Dowd, B. / Dumps, R. / Durante, P. / Fadel, W. / Farry, S. / Prieto, A. Fern'andez / Flynn, G. / Lima, V. Franco / Frei, R. / Torreira, A. Gallas / Guida, R. / Hennessy, K. / Henriques, A. / Hutchcroft, D. / Ilic, S. / Jevtic, A. / Joram, C. / Kapusniak, K. / Cid, E. Lemos / Lindner, J. / Lindner, R. / Milovanovic, M. / Mico, S. / Morant, J. / Morel, M. / Manne, G. / Murray, D. / Nasteva, I. / Neufeld, N. / Neuhold, I. / L'opez, F. Pardo-Sobrino / Trigo, E. P'erez / Jallas, G. Pichel / Pilorz, E. / Piquilloud, L. / Pons, X. / Reiner, D. / Roosens, C. / Rostalski, P. / Schmidt, B. / Saucet, E. / Sanders, F. / Sigaud, C. / Schoettker, P. / Schwemmer, R. / Schindler, H. / Sharma, A. / Svihra, P. / Leemput, J. van / Vignaux, L. / Vasey, F. / Woonton, H. / Wyllie, K.

    Abstract: HEV is a low-cost, versatile, high-quality ventilator, which has been designed in response to the COVID-19 pandemic. The ventilator is intended to be used both in and out of hospital intensive care units, and for both invasive and non-invasive ... ...

    Abstract HEV is a low-cost, versatile, high-quality ventilator, which has been designed in response to the COVID-19 pandemic. The ventilator is intended to be used both in and out of hospital intensive care units, and for both invasive and non-invasive ventilation. The hardware can be complemented with an external turbine for use in regions where compressed air supplies are not reliably available. The standard modes provided include PC-A/C(Pressure Assist Control),PC-A/C-PRVC(Pressure Regulated Volume Control), PC-PSV (Pressure Support Ventilation) and CPAP (Continuous Positive airway pressure). HEV is designed to support remote training and post market surveillance via a web interface and data logging to complement the standard touch screen operation, making it suitable for a wide range of geographical deployment. The HEV design places emphasis on the quality of the pressure curves and the reactivity of the trigger, delivering a global performance which will be applicable to ventilator needs beyond theCOVID-19 pandemic. This article describes the conceptual design and presents the prototype units together with their performance evaluation.
    Keywords covid19
    Publisher ArXiv
    Document type Article
    Database COVID19

    Kategorien

  4. Book ; Online: The HEV Ventilator

    Buytaert, J. / Abud, A. Abed / Allport, P. / Álvarez, A. Pazos / Akiba, K. / Francisco, O. Augusto de Aguiar / Bay, A. / Bernard, F. / Baron, S. / Bertella, C. / Brunner, J. / Bowcock, T. / Jode, M. Buytaert-De / Byczynski, W. / De Carvalho, R. / Coco, V. / Collins, P. / Collins, R. / Dikic, N. /
    Dousse, N. / Dowd, B. / Dumps, R. / Durante, P. / Fadel, W. / Farry, S. / Prieto, A. Fernández / Flynn, G. / Lima, V. Franco / Frei, R. / Torreira, A. Gallas / Guida, R. / Hennessy, K. / Henriques, A. / Hutchcroft, D. / Ilic, S. / Jevtic, A. / Joram, C. / Kapusniak, K. / Cid, E. Lemos / Lindner, J. / Lindner, R. / Milovanovic, M. / Mico, S. / Morant, J. / Morel, M. / Männe, G. / Murray, D. / Nasteva, I. / Neufeld, N. / Neuhold, I. / López, F. Pardo-Sobrino / Trigo, E. Pérez / Jallas, G. Pichel / Pilorz, E. / Piquilloud, L. / Pons, X. / Reiner, D. / Roosens, C. / Rostalski, P. / Schmidt, B. / Saucet, E. / Sanders, F. / Sigaud, C. / Schoettker, P. / Schwemmer, R. / Schindler, H. / Sharma, A. / Svihra, P. / van Leemput, J. / Vignaux, L. / Vasey, F. / Woonton, H. / Wyllie, K.

    2020  

    Abstract: HEV is a low-cost, versatile, high-quality ventilator, which has been designed in response to the COVID-19 pandemic. The ventilator is intended to be used both in and out of hospital intensive care units, and for both invasive and non-invasive ... ...

    Abstract HEV is a low-cost, versatile, high-quality ventilator, which has been designed in response to the COVID-19 pandemic. The ventilator is intended to be used both in and out of hospital intensive care units, and for both invasive and non-invasive ventilation. The hardware can be complemented with an external turbine for use in regions where compressed air supplies are not reliably available. The standard modes provided include PC-A/C(Pressure Assist Control),PC-A/C-PRVC(Pressure Regulated Volume Control), PC-PSV (Pressure Support Ventilation) and CPAP (Continuous Positive airway pressure). HEV is designed to support remote training and post market surveillance via a web interface and data logging to complement the standard touch screen operation, making it suitable for a wide range of geographical deployment. The HEV design places emphasis on the quality of the pressure curves and the reactivity of the trigger, delivering a global performance which will be applicable to ventilator needs beyond theCOVID-19 pandemic. This article describes the conceptual design and presents the prototype units together with their performance evaluation.

    Comment: 34 pages, 18 figures, Extended version of the article submitted to PNAS
    Keywords Physics - Medical Physics ; covid19
    Subject code 690
    Publishing date 2020-07-23
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Book ; Online: The HEV Ventilator

    Buytaert, J / Collins, P / Abed Abud, A / Allport, P / Pazos Alvarez, A / Akiba, K / Augusto de Aguiar Francisco, O / Bay, A / Bernard, F / Baron, S / Bertella, C / Brunner, J / Bowcock, T / Buytaert-De Jode, M / Byczynski, W / De Carvalho, R / Coco, V / Collins, R / Dikic, N /
    Dousse, N / Dowd, B / Dumps, R / Durante, P / Fadel, W / Farry, S / Fernandez Prieto, A / Flynn, G / Franco Lima, V / Frei, R / Gallas Torreira, A / Guida, R / Hennessy, K / Henriques, A / Hutchcroft, D / Ilic, S / Jevtic, A / Joram, C / Kapusniak, K / Lemos Cid, E / Lindner, J / Lindner, R / Milovanovic, M / Mico, S / Morant, J / Morel, M / Männel, G / Murray, D / Nasteva, I / Neufeld, N / Neuhold, I / Pardo-Sobrino Lopez, F / Perez Trigo, E / Pichel Jallas, G / Pilorz, E / Piquilloud, L / Pons, X / Reiner, D / Roosens, C / Rostalski, P / Sanders, F / Saucet, E / Schmidt, B / Schoettker, P / Schwemmer, R / Schindler, H / Sharma, A / Sigaud, C / Svihra, P / van Leemput, J / Vignaux, L / Vasey, F / Woonton, H / Wyllie, K

    2020  

    Abstract: HEV is a low-cost, versatile, high-quality ventilator, which has been designed in response to the COVID-19 pandemic. The ventilator is intended to be used both in and out of hospital intensive care units, and for both invasive and non-invasive ... ...

    Abstract HEV is a low-cost, versatile, high-quality ventilator, which has been designed in response to the COVID-19 pandemic. The ventilator is intended to be used both in and out of hospital intensive care units, and for both invasive and non-invasive ventilation. The hard-ware can be complemented with an external turbine for use in regions where compressed air supplies are not reliably available. The standard modes provided include PC–A/C (Pressure Assist Control), PC–A/C–PRVC (Pressure Regulated Volume Control), PC-PSV (Pressure Support Ventilation) and CPAP (Continuous Positive Airway Pressure). HEV is designed to support remote training and post market surveillance via a web interface and data logging to complement the standard touch screen operation, making it suitable for a wide range of geographical deployment. The HEV design places emphasis on the quality of the pressure curves and the reactivity of the trigger,delivering a global performance which will be applicable to ventilator needs beyond the COVID-19 pandemic. This article describes the conceptual design and presents the prototype units together with their performance evaluation.
    Keywords Detectors and Experimental Techniques ; covid19
    Subject code 690
    Publishing date 2020-08-18
    Publishing country ch
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: The HEV Ventilator: at the interface between particle physics and biomedical engineering.

    Buytaert, Jan / Collins, Paula / Abed Abud, Adam / Allport, Phil / Pazos Álvarez, Antonio / Akiba, Kazuyoshi / de Aguiar Francisco, Oscar Augusto / Bay, Aurelio / Bernard, Florian / Baron, Sophie / Bertella, Claudia / Brunner, Josef X / Bowcock, Themis / Buytaert-De Jode, Martine / Byczynski, Wiktor / De Carvalho, Ricardo / Coco, Victor / Collins, Ruth / Dikic, Nikola /
    Dousse, Nicolas / Dowd, Bruce / Dreimanis, Kārlis / Dumps, Raphael / Durante, Paolo / Fadel, Walid / Farry, Stephen / Fernàndez Prieto, Antonio / Fernàndez Tèllez, Arturo / Flynn, Gordon / Franco Lima, Vinicius / Frei, Raymond / Gallas Torreira, Abraham / García Chàvez, Tonatiuh / Gazis, Evangelos / Guida, Roberto / Hennessy, Karol / Henriques, Andre / Hutchcroft, David / Ilic, Stefan / Ivanovs, Artūrs / Jevtic, Aleksandar / Jimenez Dominguez, Emigdio / Joram, Christian / Kapusniak, Kacper / Lemos Cid, Edgar / Lindner, Jana / Lindner, Rolf / Ivàn Martínez Hernàndez, M / Meboldt, Mirko / Milovanovic, Marko / Mico, Sylvain / Morant, Johan / Morel, Michel / Männel, Georg / Murray, Dónal / Nasteva, Irina / Neufeld, Niko / Neuhold, Igor / Pardo-Sobrino López, Francisco / Pèrez Trigo, Eliseo / Pichel Jallas, Gonzalo / Pilorz, Edyta / Piquilloud, Lise / Pons, Xavier / Reiner, David / Règules Medel, Hector David / Rodríguez Ramírez, Saul / Rodíguez Cahuantzi, Mario / Roosens, Carl / Rostalski, Philipp / Sanders, Freek / Saucet, Eric / Schmid Daners, Marianne / Schmidt, Burkhard / Schoettker, Patrick / Schwemmer, Rainer / Schindler, Heinrich / Sharma, Archana / Sivakumaran, Derick / Sigaud, Christophe / Spitas, Vasilios / Steffen, Nicola / Svihra, Peter / Tejeda Muñoz, Guillermo / Tachatos, Nikolaos / Tsolakis, Efstratios / van Leemput, Jan / Vignaux, Laurence / Vasey, Francois / Woonton, Hamish / Wyllie, Ken

    Royal Society open science

    2022  Volume 9, Issue 3, Page(s) 211519

    Abstract: A high-quality, low-cost ventilator, dubbed HEV, has been developed by the particle physics community working together with biomedical engineers and physicians around the world. The HEV design is suitable for use both in and out of hospital intensive ... ...

    Abstract A high-quality, low-cost ventilator, dubbed HEV, has been developed by the particle physics community working together with biomedical engineers and physicians around the world. The HEV design is suitable for use both in and out of hospital intensive care units, provides a variety of modes and is capable of supporting spontaneous breathing and supplying oxygen-enriched air. An external air supply can be combined with the unit for use in situations where compressed air is not readily available. HEV supports remote training and post market surveillance via a Web interface and data logging to complement standard touch screen operation, making it suitable for a wide range of geographical deployment. The HEV design places emphasis on the ventilation performance, especially the quality and accuracy of the pressure curves, reactivity of the trigger, measurement of delivered volume and control of oxygen mixing, delivering a global performance which will be applicable to ventilator needs beyond the COVID-19 pandemic. This article describes the conceptual design and presents the prototype units together with a performance evaluation.
    Language English
    Publishing date 2022-03-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 2787755-3
    ISSN 2054-5703
    ISSN 2054-5703
    DOI 10.1098/rsos.211519
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Measurement of CP Violation in B^{0}→ψ(→ℓ^{+}ℓ^{-})K_{S}^{0}(→π^{+}π^{-}) Decays.

    Aaij, R / Abdelmotteleb, A S W / Abellan Beteta, C / Abudinén, F / Ackernley, T / Adeva, B / Adinolfi, M / Adlarson, P / Afsharnia, H / Agapopoulou, C / Aidala, C A / Ajaltouni, Z / Akar, S / Akiba, K / Albicocco, P / Albrecht, J / Alessio, F / Alexander, M / Alfonso Albero, A /
    Aliouche, Z / Alvarez Cartelle, P / Amalric, R / Amato, S / Amey, J L / Amhis, Y / An, L / Anderlini, L / Andersson, M / Andreianov, A / Andreola, P / Andreotti, M / Andreou, D / Ao, D / Archilli, F / Artamonov, A / Artuso, M / Aslanides, E / Atzeni, M / Audurier, B / Bacher, D / Bachiller Perea, I / Bachmann, S / Bachmayer, M / Back, J J / Bailly-Reyre, A / Baladron Rodriguez, P / Balagura, V / Baldini, W / Baptista de Souza Leite, J / Barbetti, M / Barbosa, I R / Barlow, R J / Barsuk, S / Barter, W / Bartolini, M / Baryshnikov, F / Basels, J M / Bassi, G / Batsukh, B / Battig, A / Bay, A / Beck, A / Becker, M / Bedeschi, F / Bediaga, I B / Beiter, A / Belin, S / Bellee, V / Belous, K / Belov, I / Belyaev, I / Benane, G / Bencivenni, G / Ben-Haim, E / Berezhnoy, A / Bernet, R / Bernet Andres, S / Berninghoff, D / Bernstein, H C / Bertella, C / Bertolin, A / Betancourt, C / Betti, F / Bex, J / Bezshyiko, Ia / Bhom, J / Bian, L / Bieker, M S / Biesuz, N V / Billoir, P / Biolchini, A / Birch, M / Bishop, F C R / Bitadze, A / Bizzeti, A / Blago, M P / Blake, T / Blanc, F / Blank, J E / Blusk, S / Bobulska, D / Bocharnikov, V / Boelhauve, J A / Boente Garcia, O / Boettcher, T / Bohare, A / Boldyrev, A / Bolognani, C S / Bolzonella, R / Bondar, N / Borgato, F / Borghi, S / Borsato, M / Borsuk, J T / Bouchiba, S A / Bowcock, T J V / Boyer, A / Bozzi, C / Bradley, M J / Braun, S / Brea Rodriguez, A / Breer, N / Brodzicka, J / Brossa Gonzalo, A / Brown, J / Brundu, D / Buonaura, A / Buonincontri, L / Burke, A T / Burr, C / Bursche, A / Butkevich, A / Butter, J S / Buytaert, J / Byczynski, W / Cadeddu, S / Cai, H / Calabrese, R / Calefice, L / Cali, S / Calvi, M / Calvo Gomez, M / Cambon Bouzas, J / Campana, P / Campora Perez, D H / Campoverde Quezada, A F / Capelli, S / Capriotti, L / Carbone, A / Carcedo Salgado, L / Cardinale, R / Cardini, A / Carniti, P / Carus, L / Casais Vidal, A / Caspary, R / Casse, G / Cattaneo, M / Cavallero, G / Cavallini, V / Celani, S / Cerasoli, J / Cervenkov, D / Chadwick, A J / Chahrour, I / Chapman, M G / Charles, M / Charpentier, Ph / Chavez Barajas, C A / Chefdeville, M / Chen, C / Chen, S / Chernov, A / Chernyshenko, S / Chobanova, V / Cholak, S / Chrzaszcz, M / Chubykin, A / Chulikov, V / Ciambrone, P / Cicala, M F / Cid Vidal, X / Ciezarek, G / Cifra, P / Clarke, P E L / Clemencic, M / Cliff, H V / Closier, J / Cobbledick, J L / Cocha Toapaxi, C / Coco, V / Cogan, J / Cogneras, E / Cojocariu, L / Collins, P / Colombo, T / Comerma-Montells, A / Congedo, L / Contu, A / Cooke, N / Corredoira, I / Correia, A / Corti, G / Cottee Meldrum, J J / Couturier, B / Craik, D C / Cruz Torres, M / Currie, R / Da Silva, C L / Dadabaev, S / Dai, L / Dai, X / Dall'Occo, E / Dalseno, J / D'Ambrosio, C / Daniel, J / Danilina, A / d'Argent, P / Davidson, A / Davies, J E / Davis, A / De Aguiar Francisco, O / de Boer, J / De Bruyn, K / De Capua, S / De Cian, M / De Freitas Carneiro Da Graca, U / De Lucia, E / De Miranda, J M / De Paula, L / De Serio, M / De Simone, D / De Simone, P / De Vellis, F / de Vries, J A / Dean, C T / Debernardis, F / Decamp, D / Dedu, V / Del Buono, L / Delaney, B / Dembinski, H-P / Denysenko, V / Deschamps, O / Dettori, F / Dey, B / Di Nezza, P / Diachkov, I / Didenko, S / Ding, S / Dobishuk, V / Docheva, A D / Dolmatov, A / Dong, C / Donohoe, A M / Dordei, F / Dos Reis, A C / Douglas, L / Downes, A G / Duan, W / Duda, P / Dudek, M W / Dufour, L / Duk, V / Durante, P / Duras, M M / Durham, J M / Dutta, D / Dziurda, A / Dzyuba, A / Easo, S / Eckstein, E / Egede, U / Egorychev, A / Egorychev, V / Eirea Orro, C / Eisenhardt, S / Ejopu, E / Ek-In, S / Eklund, L / Elashri, M / Ellbracht, J / Ely, S / Ene, A / Epple, E / Escher, S / Eschle, J / Esen, S / Evans, T / Fabiano, F / Falcao, L N / Fan, Y / Fang, B / Fantini, L / Faria, M / Farmer, K / Farry, S / Fazzini, D / Felkowski, L / Feng, M / Feo, M / Fernandez Gomez, M / Fernez, A D / Ferrari, F / Ferreira Lopes, L / Ferreira Rodrigues, F / Ferreres Sole, S / Ferrillo, M / Ferro-Luzzi, M / Filippov, S / Fini, R A / Fiorini, M / Firlej, M / Fischer, K M / Fitzgerald, D S / Fitzpatrick, C / Fiutowski, T / Fleuret, F / Fontana, M / Fontanelli, F / Foreman, L F / Forty, R / Foulds-Holt, D / Franco Sevilla, M / Frank, M / Franzoso, E / Frau, G / Frei, C / Friday, D A / Frontini, L / Fu, J / Fuehring, Q / Fujii, Y / Fulghesu, T / Gabriel, E / Galati, G / Galati, M D / Gallas Torreira, A / Galli, D / Gambetta, S / Gandelman, M / Gandini, P / Gao, H / Gao, R / Gao, Y / Garau, M / Garcia Martin, L M / Garcia Moreno, P / García Pardiñas, J / Garcia Plana, B / Garcia Rosales, F A / Garrido, L / Gaspar, C / Geertsema, R E / Gerken, L L / Gersabeck, E / Gersabeck, M / Gershon, T / Giambastiani, L / Giasemis, F I / Gibson, V / Giemza, H K / Gilman, A L / Giovannetti, M / Gioventù, A / Gironella Gironell, P / Giugliano, C / Giza, M A / Gizdov, K / Gkougkousis, E L / Glaser, F C / Gligorov, V V / Göbel, C / Golobardes, E / Golubkov, D 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    Physical review letters

    2024  Volume 132, Issue 2, Page(s) 21801

    Abstract: A measurement of time-dependent CP violation in the decays of B^{0} and B[over ¯]^{0} mesons to the final states J/ψ(→μ^{+}μ^{-})K_{S}^{0}, ψ(2S)(→μ^{+}μ^{-})K_{S}^{0} and J/ψ(→e^{+}e^{-})K_{S}^{0} with K_{S}^{0}→π^{+}π^{-} is presented. The data ... ...

    Abstract A measurement of time-dependent CP violation in the decays of B^{0} and B[over ¯]^{0} mesons to the final states J/ψ(→μ^{+}μ^{-})K_{S}^{0}, ψ(2S)(→μ^{+}μ^{-})K_{S}^{0} and J/ψ(→e^{+}e^{-})K_{S}^{0} with K_{S}^{0}→π^{+}π^{-} is presented. The data correspond to an integrated luminosity of 6  fb^{-1} collected at a center-of-mass energy of sqrt[s]=13  TeV with the LHCb detector. The CP-violation parameters are measured to be S_{ψK_{S}^{0}}=0.717±0.013(stat)±0.008(syst) and C_{ψK_{S}^{0}}=0.008±0.012(stat)±0.003(syst). This measurement of S_{ψK_{S}^{0}} represents the most precise single measurement of the CKM angle β to date and is more precise than the current world average. In addition, measurements of the CP-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed.
    Language English
    Publishing date 2024-01-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.132.021801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Improved Measurement of CP Violation Parameters in B_{s}^{0}→J/ψK^{+}K^{-} Decays in the Vicinity of the ϕ(1020) Resonance.

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    Physical review letters

    2024  Volume 132, Issue 5, Page(s) 51802

    Abstract: The decay-time-dependent CP asymmetry in B_{s}^{0}→J/ψ(→μ^{+}μ^{-})K^{+}K^{-} decays is measured using proton-proton collision data, corresponding to an integrated luminosity of 6  fb^{-1}, collected with the LHCb detector at a center-of-mass energy of ... ...

    Abstract The decay-time-dependent CP asymmetry in B_{s}^{0}→J/ψ(→μ^{+}μ^{-})K^{+}K^{-} decays is measured using proton-proton collision data, corresponding to an integrated luminosity of 6  fb^{-1}, collected with the LHCb detector at a center-of-mass energy of 13 TeV. Using a sample of approximately 349 000 B_{s}^{0} signal decays with an invariant K^{+}K^{-} mass in the vicinity of the ϕ(1020) resonance, the CP-violating phase ϕ_{s} is measured, along with the difference in decay widths of the light and heavy mass eigenstates of the B_{s}^{0}-B[over ¯]_{s}^{0} system, ΔΓ_{s}, and the difference of the average B_{s}^{0} and B^{0} meson decay widths, Γ_{s}-Γ_{d}. The values obtained are ϕ_{s}=-0.039±0.022±0.006  rad, ΔΓ_{s}=0.0845±0.0044±0.0024  ps^{-1}, and Γ_{s}-Γ_{d}=-0.0056_{-0.0015}^{+0.0013}±0.0014  ps^{-1}, where the first uncertainty is statistical and the second systematic. These are the most precise single measurements to date and are consistent with expectations based on the Standard Model and with the previous LHCb analyses of this decay. These results are combined with previous independent LHCb measurements. The phase ϕ_{s} is also measured independently for each polarization state of the K^{+}K^{-} system and shows no evidence for polarization dependence.
    Language English
    Publishing date 2024-02-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.132.051802
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the Ω_{c}^{0} Baryon.

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    Physical review letters

    2024  Volume 132, Issue 8, Page(s) 81802

    Abstract: The first observation of the singly Cabibbo-suppressed Ω_{c}^{0}→Ω^{-}K^{+} and Ω_{c}^{0}→Ξ^{-}π^{+} decays is reported, using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4  fb^{-1}, ... ...

    Abstract The first observation of the singly Cabibbo-suppressed Ω_{c}^{0}→Ω^{-}K^{+} and Ω_{c}^{0}→Ξ^{-}π^{+} decays is reported, using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4  fb^{-1}, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be B(Ω_{c}^{0}→Ω^{-}K^{+})/B(Ω_{c}^{0}→Ω^{-}π^{+})=[6.08±0.51(stat)±0.40(syst)]%,B(Ω_{c}^{0}→Ξ^{-}π^{+})/B(Ω_{c}^{0}→Ω^{-}π^{+})=[15.81±0.87(stat)±0.44(syst)±0.16(ext)]%. In addition, using the Ω_{c}^{0}→Ω^{-}π^{+} decay channel, the Ω_{c}^{0} baryon mass is measured to be M(Ω_{c}^{0})=2695.28±0.07(stat)±0.27(syst)±0.30(ext)  MeV, improving the precision of the previous world average by a factor of 4.
    Language English
    Publishing date 2024-02-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.132.081802
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Enhanced Production of Λ_{b}^{0} Baryons in High-Multiplicity pp Collisions at sqrt[s]=13  TeV.

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    Physical review letters

    2024  Volume 132, Issue 8, Page(s) 81901

    Abstract: The production rate of Λ_{b}^{0} baryons relative to B^{0} mesons in pp collisions at a center-of-mass energy sqrt[s]=13  TeV is measured by the LHCb experiment. The ratio of Λ_{b}^{0} to B^{0} production cross sections shows a significant dependence on ... ...

    Abstract The production rate of Λ_{b}^{0} baryons relative to B^{0} mesons in pp collisions at a center-of-mass energy sqrt[s]=13  TeV is measured by the LHCb experiment. The ratio of Λ_{b}^{0} to B^{0} production cross sections shows a significant dependence on both the transverse momentum and the measured charged-particle multiplicity. At low multiplicity, the ratio measured at LHCb is consistent with the value measured in e^{+}e^{-} collisions, and increases by a factor of ∼2 with increasing multiplicity. At relatively low transverse momentum, the ratio of Λ_{b}^{0} to B^{0} cross sections is higher than what is measured in e^{+}e^{-} collisions, but converges with the e^{+}e^{-} ratio as the momentum increases. These results imply that the evolution of heavy b quarks into final-state hadrons is influenced by the density of the hadronic environment produced in the collision. Comparisons with several models and implications for the mechanisms enforcing quark confinement are discussed.
    Language English
    Publishing date 2024-03-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.132.081901
    Database MEDical Literature Analysis and Retrieval System OnLINE

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