{"id":20838,"date":"2025-12-16T08:30:00","date_gmt":"2025-12-16T07:30:00","guid":{"rendered":"https:\/\/citeni.udc.es\/?p=20838"},"modified":"2025-12-18T08:47:07","modified_gmt":"2025-12-18T07:47:07","slug":"persoal-investigador-do-citeni-mellora-o-estudo-da-fisica-de-particulas-do-cern-con-redes-neuronais","status":"publish","type":"post","link":"https:\/\/citeni.udc.es\/gl\/persoal-investigador-do-citeni-mellora-o-estudo-da-fisica-de-particulas-do-cern-con-redes-neuronais\/","title":{"rendered":"Persoal investigador do CITENI mellora o estudo da f\u00edsica de part\u00edculas do CERN con redes neuronais"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"20838\" class=\"elementor elementor-20838 elementor-20827\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-791f8b5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"791f8b5\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2755da9\" data-id=\"2755da9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0f385ca elementor-widget elementor-widget-tp-heading\" data-id=\"0f385ca\" data-element_type=\"widget\" data-widget_type=\"tp-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t\n                    <div class=\"tp-section\">\n                                <span class=\"tp-section__sub-title left-line right-line mb-25 tp-el-subtitle\">\n                    O grupo de F\u00edsica e Tecnolox\u00eda Nuclear e de Altas Enerx\u00edas (FiTNAE) do Centro de Investigaci\u00f3n en Tecnolox\u00edas Navais e Industriais (CITENI), no Campus Industrial de Ferrol da Universidade da Coru\u00f1a (UDC), lidera o desenvolvemento dun algoritmo baseado en redes neuronais que mellora a identificaci\u00f3n do \u201csabor\u201d dos mes\u00f3ns B no experimento LHCb do CERN. O traballo, publicado no Journal of High Energy Physics e destacado no CERN Courier, permite estudar con maior precisi\u00f3n fen\u00f3menos fundamentais que axudan a entender o porqu\u00e9 da asimetr\u00eda entre a materia e a antimateria no universo.                <\/span>\n                                                            <\/div>\n        \n        \n        \t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0bcf3c4 elementor-widget elementor-widget-text-editor\" data-id=\"0bcf3c4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>Ferrol, 16 de decembro de 2025<\/strong>.- O LHCb, un dos detectores do gran colisor de hadr\u00f3ns (LHC) do CERN en Su\u00edza, produce colisi\u00f3ns de prot\u00f3ns a alt\u00edsimas enerx\u00edas. Estas colisi\u00f3ns xeran part\u00edculas inestables que conte\u00f1en quarks pesados, cuxa desintegraci\u00f3n permite estudar fen\u00f3menos de f\u00edsica fundamental que axudan a explicar por que o universo est\u00e1 formado principalmente por materia e case non cont\u00e9n antimateria. <\/p><p>O equipo do experimento, grazas a un estudo liderado por persoal investigador do CITENI, no Campus Industrial de Ferrol, desenvolveu un algoritmo inclusivo baseado en redes neuronais profundas (DeepSets) que analiza todas as part\u00edculas de cada colisi\u00f3n, o que permite reconstru\u00edr de maneira m\u00e1is completa a orixe de cada mes\u00f3n B.<\/p><p><strong>Os quarks: a materia prima do universo<\/strong><\/p><p>Pero, que \u00e9 exactamente un mes\u00f3n B e por que \u00e9 importante? Para explicalo temos que achegarnos \u00e1s part\u00edculas m\u00e1is b\u00e1sicas e elementais que constit\u00faen a materia: os quarks. Hai seis tipos (up, down, charm, strange, top e bottom) e comb\u00ednanse entre si para formar outras part\u00edculas compostas chamadas hadr\u00f3ns. Os mes\u00f3ns B son un tipo de hadr\u00f3n formado por un quark bottom e outro quark m\u00e1is lixeiro. Alg\u00fans mes\u00f3ns B, como B\u2070 e B\u209b\u2070, que son neutros, poden transformarse na s\u00faa antipart\u00edcula e logo volver ao seu estado inicial, nun proceso chamado oscilaci\u00f3n. Determinar o \u201c<strong>sabor<\/strong>\u201d dun mes\u00f3n, \u00e9 dicir, o tipo de quark que conti\u00f1a no seu estado inicial, \u00e9 esencial para medir estas oscilaci\u00f3ns e estudar a <strong>violaci\u00f3n da simetr\u00eda de carga-paridade (CP)<\/strong>, un fen\u00f3meno que explica a predominancia da materia sobre a antimateria no universo.     <\/p><p><strong>Reconstru\u00edndo o invisible<\/strong><\/p><p>Co\u00f1ecer o sabor orixinal dun mes\u00f3n B \u00e9 complexo, xa que se vai formar nun contorno ca\u00f3tico cheo de part\u00edculas xeradas na colisi\u00f3n de prot\u00f3ns. Ata agora, no experimento LHCb utiliz\u00e1banse d\u00faas t\u00e9cnicas principais: a <strong>identificaci\u00f3n polo lado oposto (Opposite Side, OS)<\/strong>, na que se analiza o outro quark xerado na mesma colisi\u00f3n para deducir o sabor do mes\u00f3n B; e a <strong>identificaci\u00f3n polo mesmo lado (Same Side, SS)<\/strong>, na que se estudan as part\u00edculas que acompa\u00f1an o mes\u00f3n, que deixan pistas sobre o seu sabor inicial. Ambos os m\u00e9todos aproveitan s\u00f3 parte da informaci\u00f3n dispo\u00f1ible, o que limita a cantidade e a calidade dos datos \u00fatiles.  <\/p><p><strong>Intelixencia artificial ao rescate<\/strong><\/p><p>Agora, grazas a esta investigaci\u00f3n que considera toda a informaci\u00f3n do evento de maneira global, mell\u00f3ranse tanto a fracci\u00f3n dos mes\u00f3ns correctamente etiquetados (<strong><em>flavor tagging<\/em><\/strong>) como a fiabilidade de cada etiqueta. Adestrado e calibrado con desintegraci\u00f3ns co\u00f1ecidas de mes\u00f3ns B neutros como B\u2070 e B\u209b\u2070, o algoritmo logrou un 35 % m\u00e1is de poder de etiquetaxe para B\u2070 e un 20 % m\u00e1is para B\u209b\u2070, en comparaci\u00f3n coas t\u00e9cnicas tradicionais descritas anteriormente. Esta mellora equivale a dispo\u00f1er de moitos <strong>m\u00e1is datos efectivos por colisi\u00f3n<\/strong>, o que incrementa a precisi\u00f3n das an\u00e1lises e a capacidade do experimento LHCb para explorar posibles desviaci\u00f3ns do <strong>modelo est\u00e1ndar<\/strong>.  <\/p><p><strong>Publicaci\u00f3ns e colaboraci\u00f3n internacional<\/strong><\/p><p>A investigaci\u00f3n coordinada polo grupo <strong>FiTNAE da UDC<\/strong> dirixiuna a investigadora Ram\u00f3n y Cajal e InTalent <strong>Veronika Chobanova<\/strong>, quen traballou xunto co investigador predoutoral <strong>John Wendel,<\/strong> a investigadora Juan de la Cierva <strong>Claire Prouv\u00e9<\/strong> e o investigador Oportunius <strong>Diego Mart\u00ednez<\/strong>. Tam\u00e9n colaborou no seu desenvolvemento o investigador da Universidade de Santiago de Compostela Ram\u00f3n Ruiz. Forman parte do equipo internacional de m\u00e1is dun milleiro de persoas investigadoras que asinan o artigo cient\u00edfico resultante, titulado \u201cInclusive B-meson flavour-tagging algorithm at LHCb\u201d, que se publicou no Journal of High Energy Physics (Springer Nature). O grupo tam\u00e9n participou na versi\u00f3n divulgativa do traballo publicada no <strong><em>CERN Courier<\/em><\/strong>, en colaboraci\u00f3n co <strong>Instituto Lemarr<\/strong> e a<strong> Universidade T\u00e9cnica de Dortmund<\/strong>.   <\/p><p><strong>Intelixencia artificial para profundar nos segredos do universo<\/strong><\/p><p>Este desenvolvemento demostra como a combinaci\u00f3n de intelixencia artificial e f\u00edsica de <strong>altas enerx\u00edas<\/strong> pode potenciar o estudo de fen\u00f3menos fundamentais. Ao aumentar a cantidade e a calidade dos datos \u00fatiles, o algoritmo permite reducir os erros estat\u00edsticos e mellorar a precisi\u00f3n das medici\u00f3ns. <\/p><p>Ademais, co experimento LHCb xa na s\u00faa fase de Run 3, que xerar\u00e1 volumes de datos sen precedentes e contar\u00e1 con detectores actualizados, este algoritmo inclusivo perf\u00edlase como unha ferramenta clave para explorar <strong>os segredos da materia e do universo<\/strong> con maior precisi\u00f3n e sensibilidade.<\/p><p>Referencias: <br><strong>Neural networks boost B-tagging<\/strong> A report from the LHCb experiment<br><a href=\"https:\/\/cerncourier.com\/a\/neural-networks-boost-b-tagging\/\">https:\/\/cerncourier.com\/a\/neural-networks-boost-b-tagging\/<\/a><\/p><p>The LHCb collaboration., Aaij, R., Abdelmotteleb, A.S.W. <em>et al.<\/em> <strong>Inclusive <em>B<\/em>-meson flavour-tagging algorithm at LHCb<\/strong>. <em>J. High Energ. Phys. <\/em> <strong>2025<\/strong>, 41 (2025). <a href=\"https:\/\/doi.org\/10.1007\/JHEP11(2025)041\">https:\/\/doi.org\/10.1007\/JHEP11(2025)041<\/a><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-00e17fa elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"00e17fa\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8bda7a9\" data-id=\"8bda7a9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-01b3f11 elementor-widget elementor-widget-image\" data-id=\"01b3f11\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"975\" src=\"https:\/\/citeni.udc.es\/wp-content\/uploads\/2025\/12\/Fig1-CCNovDec25_EF_LHCb.jpg\" class=\"attachment-full size-full wp-image-20834\" alt=\"Fig. 1. Potencia de etiquetaxe en funci\u00f3n do momento transversal do mes\u00f3n B neutro, medida con 5,4\u2009fb\u207b\u00b9 de datos de LHCb para desintegraci\u00f3ns B\u2070\u209b \u2192 D\u207b\u209b \u03c0\u207a. O etiquetador inclusivo de sabor (azul) supera a combinaci\u00f3n dos etiquetadores de lado oposto e de mesmo lado (vermello). Cr\u00e9dito: Colaboraci\u00f3n LHCb. arXiv:2508.20180\" srcset=\"https:\/\/citeni.udc.es\/wp-content\/uploads\/2025\/12\/Fig1-CCNovDec25_EF_LHCb.jpg 1200w, https:\/\/citeni.udc.es\/wp-content\/uploads\/2025\/12\/Fig1-CCNovDec25_EF_LHCb-300x244.jpg 300w, https:\/\/citeni.udc.es\/wp-content\/uploads\/2025\/12\/Fig1-CCNovDec25_EF_LHCb-1024x832.jpg 1024w, https:\/\/citeni.udc.es\/wp-content\/uploads\/2025\/12\/Fig1-CCNovDec25_EF_LHCb-768x624.jpg 768w, https:\/\/citeni.udc.es\/wp-content\/uploads\/2025\/12\/Fig1-CCNovDec25_EF_LHCb-500x406.jpg 500w, https:\/\/citeni.udc.es\/wp-content\/uploads\/2025\/12\/Fig1-CCNovDec25_EF_LHCb-800x650.jpg 800w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Fig. 1. Potencia de etiquetaxe en funci\u00f3n do momento transversal do mes\u00f3n B neutro, medida con 5,4\u2009fb\u207b\u00b9 de datos de LHCb para desintegraci\u00f3ns B\u2070\u209b \u2192 D\u207b\u209b \u03c0\u207a. O etiquetador inclusivo de sabor (azul) supera a combinaci\u00f3n dos etiquetadores de lado oposto e de mesmo lado (vermello). Cr\u00e9dito: Colaboraci\u00f3n LHCb. arXiv:2508.20180<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>O grupo de F\u00edsica e Tecnolox\u00eda Nuclear e de Altas Enerx\u00edas (FiTNAE) do Centro de Investigaci\u00f3n en Tecnolox\u00edas Navais e Industriais (CITENI), no Campus Industrial de Ferrol da Universidade da Coru\u00f1a (UDC), lidera o desenvolvemento dun algoritmo baseado en redes neuronais que mellora a identificaci\u00f3n do \u201csabor\u201d dos mes\u00f3ns B no experimento LHCb do CERN. [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":20830,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_vp_format_video_url":"","_vp_image_focal_point":{"x":0.93999999999999995,"y":0.41999999999999998},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-20838","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticias"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"O grupo de F\u00edsica e Tecnolox\u00eda Nuclear e de Altas Enerx\u00edas (FiTNAE) do Centro de Investigaci\u00f3n en Tecnolox\u00edas Navais e Industriais (CITENI), no Campus Industrial de Ferrol da Universidade da Coru\u00f1a (UDC), lidera o desenvolvemento dun algoritmo baseado en redes neuronais que mellora a identificaci\u00f3n do \u201csabor\u201d dos mes\u00f3ns B no experimento LHCb do CERN.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"CITENI UDC\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/citeni.udc.es\/gl\/persoal-investigador-do-citeni-mellora-o-estudo-da-fisica-de-particulas-do-cern-con-redes-neuronais\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.9\" \/>\n\t\t<meta property=\"og:locale\" content=\"gl_ES\" \/>\n\t\t<meta property=\"og:site_name\" content=\"CITENI - 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