{"id":{"repo_id":"greece","oai_identifier":"oai:10442/1119"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/1119","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΦΩΤΟΠΑΡΑΓΩΓΗ ΜΕΣΟΝΙΩΝ CHARM ΜΕΣΩ ΤΟΥ ΚΑΝΑΛΙΟΥ ΦΠ+ ΣΤΟ ΠΕΙΡΑΜΑ ΝΑ-14/2, ΣΤΟΝ ΕΠΙΤΑΧΥΝΤΗ S.P.S. ΤΟΥ C.E.R.N.","abstract":"THE RESULTS OF THE PHYSICS ANALYSIS FOR THE STUDY OF CHARM ARE PRESENTED IN THIS THESIS. THE EXPERIMENTAL DATA HAVE BEEN TAKEN DURING THE RUNNING OF THE NA-14/2 PHOTOPRODUCTION EXPERIMENT AT THE SPS PARTICLE ACCELARATOR AT CERN. A BRIEF DESCRIPTION OF THE EXISTING THEORETICAL MODELS FOR THE CHARM PHOTOPRODUCTION ISPRESENTED. CLEAR SIGNAL IS OBTAINED WITH THE BIGGEST PART OF THE BACKGROUND REJECTED BY: 1) A SYSTEM OF TWO CERENKOV COUNTERS (ONE OF WHICH DESIGNED AND CONSTRUCTED BY NTVA HIGH ENERGY PHYSICS LAB) AND 2) SYSTEM OF TWO DETECTORS SEARCHING FOR THE VERTEX OF THE REACTION. THE DATA ANALYSIS GAVE CLEAR SIGNALS OF THE TWO MESONS. D+ AND DS+, GIVING ALSO THE VALUS OF THEIR MASSES AND LIFETIMES. THE CHANNEL OBTAINED WAS D+ --> ΦΠ+ AND DS+ --> ΦΠ+.","abstract_html":"THE RESULTS OF THE PHYSICS ANALYSIS FOR THE STUDY OF CHARM ARE PRESENTED IN THIS THESIS. THE EXPERIMENTAL DATA HAVE BEEN TAKEN DURING THE RUNNING OF THE NA-14/2 PHOTOPRODUCTION EXPERIMENT AT THE SPS PARTICLE ACCELARATOR AT CERN. A BRIEF DESCRIPTION OF THE EXISTING THEORETICAL MODELS FOR THE CHARM PHOTOPRODUCTION ISPRESENTED. CLEAR SIGNAL IS OBTAINED WITH THE BIGGEST PART OF THE BACKGROUND REJECTED BY: 1) A SYSTEM OF TWO CERENKOV COUNTERS (ONE OF WHICH DESIGNED AND CONSTRUCTED BY NTVA HIGH ENERGY PHYSICS LAB) AND 2) SYSTEM OF TWO DETECTORS SEARCHING FOR THE VERTEX OF THE REACTION. THE DATA ANALYSIS GAVE CLEAR SIGNALS OF THE TWO MESONS. D+ AND DS+, GIVING ALSO THE VALUS OF THEIR MASSES AND LIFETIMES. THE CHANNEL OBTAINED WAS D+ --> ΦΠ+ AND DS+ --> ΦΠ+.","abstract_has_math":false,"creators":["Maltezos, Antonios","Μαλτέζος, Αντώνης"],"institution":"National Technical University of Athens (NTUA)","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1989,"date_issued":"1989","date_published":"1989","updated_at":"2026-07-24T02:24:43Z","subjects":["CHARMED MESONS","PHOTOPRODUCTION","SUPER PROTRON SYNCHROTRON","ΜΕΣΟΝΙΑ CHARM","ΥΠΕΡΣΥΓΧΡΟΤΡΟΝΙΟ ΠΡΩΤΟΝΙΩΝ","ΦΩΤΟΠΑΡΑΓΩΓΗ","Φυσικές Επιστήμες","Φυσική","Natural Sciences","Physical Sciences"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1119"],"render_values":[{"text":"10.12681/eadd/1119","href":"https://doi.org/10.12681/eadd/1119","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/1119","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Maltezos, Antonios","Μαλτέζος, Αντώνης"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1989"]},{"key":"dc:publisher","label":"Institution","values":["National Technical University of Athens (NTUA)","Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["CHARMED MESONS","PHOTOPRODUCTION","SUPER PROTRON SYNCHROTRON","ΜΕΣΟΝΙΑ CHARM","ΥΠΕΡΣΥΓΧΡΟΤΡΟΝΙΟ ΠΡΩΤΟΝΙΩΝ","ΦΩΤΟΠΑΡΑΓΩΓΗ","Φυσικές Επιστήμες","Φυσική","Natural Sciences","Physical Sciences"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1119","http://hdl.handle.net/10442/hedi/1119"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["THE RESULTS OF THE PHYSICS ANALYSIS FOR THE STUDY OF CHARM ARE PRESENTED IN THIS THESIS. THE EXPERIMENTAL DATA HAVE BEEN TAKEN DURING THE RUNNING OF THE NA-14/2 PHOTOPRODUCTION EXPERIMENT AT THE SPS PARTICLE ACCELARATOR AT CERN. A BRIEF DESCRIPTION OF THE EXISTING THEORETICAL MODELS FOR THE CHARM PHOTOPRODUCTION ISPRESENTED. CLEAR SIGNAL IS OBTAINED WITH THE BIGGEST PART OF THE BACKGROUND REJECTED BY: 1) A SYSTEM OF TWO CERENKOV COUNTERS (ONE OF WHICH DESIGNED AND CONSTRUCTED BY NTVA HIGH ENERGY PHYSICS LAB) AND 2) SYSTEM OF TWO DETECTORS SEARCHING FOR THE VERTEX OF THE REACTION. THE DATA ANALYSIS GAVE CLEAR SIGNALS OF THE TWO MESONS. D+ AND DS+, GIVING ALSO THE VALUS OF THEIR MASSES AND LIFETIMES. THE CHANNEL OBTAINED WAS D+ --> ΦΠ+ AND DS+ --> ΦΠ+.","ΣΤΗΝ ΕΡΓΑΣΙΑ ΑΥΤΗ ΠΑΡΟΥΣΙΑΖΟΝΤΑΙ ΑΠΟΤΕΛΕΣΜΑΤΑ ΑΠΟ ΤΗΝ ΜΕΛΕΤΗ ΜΕΣΟΝΙΩΝ ΠΟΥ ΠΕΡΙΛΑΜΒΑΝΟΥΝ ΤΟΝ ΚΒΑΝΤΙΚΟ ΑΡΙΘΜΟ CHARM. ΤΑ ΔΕΔΟΜΕΝΑ ΕΛΗΦΘΗΣΑΝ ΣΤΟ ΠΕΙΡΑΜΑ ΦΩΤΟΠΑΡΑΓΩΓΗΣ ΝΑ-14/2, ΣΤΟ ΥΠΕΡΣΥΓΧΡΟΤΡΟΝΙΟ ΠΡΩΤΟΝΙΩΝ SPS ΤΟΥ CERN ΣΤΗ ΓΕΝΕΥΗ. ΑΡΧΙΚΑ ΓΙΝΕΤΑΙ ΜΙΑ ΣΥΝΤΟΜΗ ΠΕΡΙΓΡΑΦΗ ΤΩΝ ΘΕΩΡΗΤΙΚΩΝ ΜΟΝΤΕΛΩΝ ΠΟΥ ΠΕΡΙΓΡΑΦΟΥΝ ΤΗΝ ΦΩΤΟΠΑΡΑΓΩΓΗ ΤΩΝ ΜΕΣΟΝΙΩΝ ΑΥΤΩΝ. ΣΗΜΑΝΤΙΚΟ ΡΟΛΟ ΓΙΑ ΤΗΝ ΠΑΡΑΓΩΓΗ ΚΑΘΑΡΩΝ ΣΗΜΑΤΩΝ ΠΑΙΖΟΥΝ: 1) ΣΥΣΤΗΜΑ ΔΥΟ ΑΠΑΡΙΘΜΗΤΩΝ CERENKOV, Ο ΕΝΑΣ ΑΠΟ ΤΟΥΣ ΟΠΟΙΟΥΣ ΣΧΕΔΙΑΣΤΗΚΕ ΚΑΙ ΚΑΤΑΣΚΕΥΑΣΤΗΚΕ ΑΠΟ ΤΗΝ ΟΜΑΔΑ ΦΥΕ ΤΟΥ ΕΜΠ ΚΑΙ 2) ΣΥΣΤΗΜΑ ΔΥΟ ΑΠΑΡΙΘΜΗΤΩΝ ΑΝΙΧΝΕΥΣΗΣ ΤΗΣ ΚΟΡΥΦΗΣ ΤΗΣ ΑΝΤΙΔΡΑΣΗΣ. Η ΑΝΑΛΥΣΗ ΤΩΝ ΔΕΔΟΜΕΝΩΝ ΕΔΩΣΕ ΚΑΘΑΡΑ ΣΗΜΑΤΑ ΑΠΟ ΤΑ ΟΠΟΙΑ ΠΡΟΣΔΙΟΡΙΣΤΗΚΕ Η ΜΑΖΑ ΤΩΝ ΣΩΜΑΤΙΔΙΩΝ D+ ΚΑΙ DS+ ΚΑΘΩΣ ΚΑΙ Ο ΧΡΟΝΟΣ ΖΩΗΣ ΤΟΥΣ ΜΕΣΩ ΤΩΝ ΚΑΝΑΛΙΩΝ D+ -->ΦΠ+ ΚΑΙ DS+ --> ΦΠ+."]},{"key":"dc:title","label":"Title","values":["ΦΩΤΟΠΑΡΑΓΩΓΗ ΜΕΣΟΝΙΩΝ CHARM ΜΕΣΩ ΤΟΥ ΚΑΝΑΛΙΟΥ ΦΠ+ ΣΤΟ ΠΕΙΡΑΜΑ ΝΑ-14/2, ΣΤΟΝ ΕΠΙΤΑΧΥΝΤΗ S.P.S. ΤΟΥ C.E.R.N.","PHOTOPRODUCTION OF CHARM MESONS THROUGH THE ΦΠ+ CHANNEL IN THE NA-14/2 EXPERIMENT OF THE S.P.S. AT C.E.R.N."]}]}],"canonical_facts":{"dc:creator":["Maltezos, Antonios","Μαλτέζος, Αντώνης"],"dc:date":["1989"],"dc:description":["THE RESULTS OF THE PHYSICS ANALYSIS FOR THE STUDY OF CHARM ARE PRESENTED IN THIS THESIS. THE EXPERIMENTAL DATA HAVE BEEN TAKEN DURING THE RUNNING OF THE NA-14/2 PHOTOPRODUCTION EXPERIMENT AT THE SPS PARTICLE ACCELARATOR AT CERN. A BRIEF DESCRIPTION OF THE EXISTING THEORETICAL MODELS FOR THE CHARM PHOTOPRODUCTION ISPRESENTED. CLEAR SIGNAL IS OBTAINED WITH THE BIGGEST PART OF THE BACKGROUND REJECTED BY: 1) A SYSTEM OF TWO CERENKOV COUNTERS (ONE OF WHICH DESIGNED AND CONSTRUCTED BY NTVA HIGH ENERGY PHYSICS LAB) AND 2) SYSTEM OF TWO DETECTORS SEARCHING FOR THE VERTEX OF THE REACTION. THE DATA ANALYSIS GAVE CLEAR SIGNALS OF THE TWO MESONS. D+ AND DS+, GIVING ALSO THE VALUS OF THEIR MASSES AND LIFETIMES. THE CHANNEL OBTAINED WAS D+ --> ΦΠ+ AND DS+ --> ΦΠ+.","ΣΤΗΝ ΕΡΓΑΣΙΑ ΑΥΤΗ ΠΑΡΟΥΣΙΑΖΟΝΤΑΙ ΑΠΟΤΕΛΕΣΜΑΤΑ ΑΠΟ ΤΗΝ ΜΕΛΕΤΗ ΜΕΣΟΝΙΩΝ ΠΟΥ ΠΕΡΙΛΑΜΒΑΝΟΥΝ ΤΟΝ ΚΒΑΝΤΙΚΟ ΑΡΙΘΜΟ CHARM. ΤΑ ΔΕΔΟΜΕΝΑ ΕΛΗΦΘΗΣΑΝ ΣΤΟ ΠΕΙΡΑΜΑ ΦΩΤΟΠΑΡΑΓΩΓΗΣ ΝΑ-14/2, ΣΤΟ ΥΠΕΡΣΥΓΧΡΟΤΡΟΝΙΟ ΠΡΩΤΟΝΙΩΝ SPS ΤΟΥ CERN ΣΤΗ ΓΕΝΕΥΗ. ΑΡΧΙΚΑ ΓΙΝΕΤΑΙ ΜΙΑ ΣΥΝΤΟΜΗ ΠΕΡΙΓΡΑΦΗ ΤΩΝ ΘΕΩΡΗΤΙΚΩΝ ΜΟΝΤΕΛΩΝ ΠΟΥ ΠΕΡΙΓΡΑΦΟΥΝ ΤΗΝ ΦΩΤΟΠΑΡΑΓΩΓΗ ΤΩΝ ΜΕΣΟΝΙΩΝ ΑΥΤΩΝ. ΣΗΜΑΝΤΙΚΟ ΡΟΛΟ ΓΙΑ ΤΗΝ ΠΑΡΑΓΩΓΗ ΚΑΘΑΡΩΝ ΣΗΜΑΤΩΝ ΠΑΙΖΟΥΝ: 1) ΣΥΣΤΗΜΑ ΔΥΟ ΑΠΑΡΙΘΜΗΤΩΝ CERENKOV, Ο ΕΝΑΣ ΑΠΟ ΤΟΥΣ ΟΠΟΙΟΥΣ ΣΧΕΔΙΑΣΤΗΚΕ ΚΑΙ ΚΑΤΑΣΚΕΥΑΣΤΗΚΕ ΑΠΟ ΤΗΝ ΟΜΑΔΑ ΦΥΕ ΤΟΥ ΕΜΠ ΚΑΙ 2) ΣΥΣΤΗΜΑ ΔΥΟ ΑΠΑΡΙΘΜΗΤΩΝ ΑΝΙΧΝΕΥΣΗΣ ΤΗΣ ΚΟΡΥΦΗΣ ΤΗΣ ΑΝΤΙΔΡΑΣΗΣ. Η ΑΝΑΛΥΣΗ ΤΩΝ ΔΕΔΟΜΕΝΩΝ ΕΔΩΣΕ ΚΑΘΑΡΑ ΣΗΜΑΤΑ ΑΠΟ ΤΑ ΟΠΟΙΑ ΠΡΟΣΔΙΟΡΙΣΤΗΚΕ Η ΜΑΖΑ ΤΩΝ ΣΩΜΑΤΙΔΙΩΝ D+ ΚΑΙ DS+ ΚΑΘΩΣ ΚΑΙ Ο ΧΡΟΝΟΣ ΖΩΗΣ ΤΟΥΣ ΜΕΣΩ ΤΩΝ ΚΑΝΑΛΙΩΝ D+ -->ΦΠ+ ΚΑΙ DS+ --> ΦΠ+."],"dc:identifier":["10.12681/eadd/1119","http://hdl.handle.net/10442/hedi/1119"],"dc:language":["gre"],"dc:publisher":["National Technical University of Athens (NTUA)","Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)"],"dc:subject":["CHARMED MESONS","PHOTOPRODUCTION","SUPER PROTRON SYNCHROTRON","ΜΕΣΟΝΙΑ CHARM","ΥΠΕΡΣΥΓΧΡΟΤΡΟΝΙΟ ΠΡΩΤΟΝΙΩΝ","ΦΩΤΟΠΑΡΑΓΩΓΗ","Φυσικές Επιστήμες","Φυσική","Natural Sciences","Physical Sciences"],"dc:title":["ΦΩΤΟΠΑΡΑΓΩΓΗ ΜΕΣΟΝΙΩΝ CHARM ΜΕΣΩ ΤΟΥ ΚΑΝΑΛΙΟΥ ΦΠ+ ΣΤΟ ΠΕΙΡΑΜΑ ΝΑ-14/2, ΣΤΟΝ ΕΠΙΤΑΧΥΝΤΗ S.P.S. ΤΟΥ C.E.R.N.","PHOTOPRODUCTION OF CHARM MESONS THROUGH THE ΦΠ+ CHANNEL IN THE NA-14/2 EXPERIMENT OF THE S.P.S. AT C.E.R.N."],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:24:43Z"}