2,630 results on '"García, Y."'
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2. A Systematic Literature Review and Research Agenda of Data-Driven Marketing
- Author
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García-y-García, Elena, primary, Rejón-Guardia, Francisco, additional, and Sánchez-Baltasar, Laura Berenice, additional
- Published
- 2024
- Full Text
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3. On a class of robust nonconvex quadratic optimization problems
- Author
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Flores-Bazán, F., García, Y., and Pérez, A.
- Subjects
Mathematics - Optimization and Control ,Primary: 90C20, 90C30, 90C26, 90C46 - Abstract
Let us consider the following robust nonconvex quadratic optimization problem: \begin{equation*} \begin{split} \min &~ \dfrac{1}{2} x^\top Ax+a^\top x \\ \text{s.t.}~ & \alpha\leq\dfrac{1}{2}x^\top (B_1+\mu B_2)x+(b_1+\delta b_2)^\top x \leq\beta,~ \forall~ \mu\in [\mu_1,\mu_2],\forall~\delta\in[\delta_1,\delta_2], \end{split} \end{equation*} where $A$, $B_1$, $B_2$ are real symmetric matrices, $\mu_1,\mu_2,\delta_1,\delta_2,\alpha$, $\beta\in\mathbb{R}$ satisfying $\mu_1\leq \mu_2$, $\delta_1\leq\delta_2$ and $\alpha<\beta$. We establish the robust alternative result; the robust S-lemma and the robust optimality for the above nonconvex problem.
- Published
- 2022
4. To What Factors Do University Students Attribute Their Academic Success?
- Author
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García y García, Blanca Elba
- Abstract
This study explores the attributions to which undergraduate university students ascribe academic achievement. Attribution theory was used as a means to understand scholastic success-failure. The questions that guided the study were the following: What are the causal attributions that predominate in students' academic achievement? Is there a difference between male and female students? Is there a difference if average grades and the number of failed subjects, factored as benchmarks of academic achievement, are considered? Do the measured attributions have any weight when predicting students' grades? A Likert scale measuring eight different attributions of academic achievement was applied to 165 students. The results showed that the most important attribution for academic achievement was intelligence. Sex-related differences were found in two attributes: calm and effort. In general, students with four failed subjects were those with the lowest averages measured in attributions. The variables that predicted good grades for male students were effort and good teachers, for female students, a liking for teachers, luck, and attention.
- Published
- 2021
5. The dynamics of ions on phased radio-frequency carpets in high pressure gases and application for barium tagging in xenon gas time projection chambers
- Author
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Jones, BJP, Raymond, A, Woodruff, K, Byrnes, N, Denisenko, AA, Foss, FW, Navarro, K, Nygren, DR, Vuong, TT, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arazi, L, Arnquist, IJ, Ayet, S, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Bounasser, S, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Cossío, FP, Díaz, G, Díaz, J, Dickel, T, Escada, J, Esteve, R, Fahs, A, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Morata, JA Hernando, Herrero-Gómez, P, Herrero, V, Ho, J, Ifergan, Y, Kekic, M, Labarga, L, Laing, A, Lebrun, P, Gutierrez, D Lopez, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, Martínez-Vara, M, McDonald, AD, Meziani, ZE, Mistry, K, Monrabal, F, Monteiro, CMB, Mora, FJ, Vidal, J Muñoz, Novella, P, Oblak, E, Odriozola-Gimeno, M, Palmeiro, B, Para, A, Pérez, J, Querol, M, Redwine, AB, Renner, J, Ripoll, L, Rivilla, I, García, Y Rodríguez, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sorel, M, Stanford, C, and Teixeira, JMR
- Subjects
Nuclear and Plasma Physics ,Physical Sciences ,Astronomical and Space Sciences ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Other Physical Sciences ,Nuclear & Particles Physics ,Nuclear and plasma physics - Abstract
Radio-frequency (RF) carpets with ultra-fine pitches are examined for ion transport in gases at atmospheric pressures and above. We develop new analytic and computational methods for modeling RF ion transport at densities where dynamics are strongly influenced by buffer gas collisions. An analytic description of levitating and sweeping forces from phased arrays is obtained, then thermodynamic and kinetic principles are used to calculate ion loss rates in the presence of collisions. This methodology is validated against detailed microscopic SIMION simulations. We then explore a parameter space of special interest for neutrinoless double beta decay experiments: transport of barium ions in xenon at pressures from 1 to 10 bar. Our computations account for molecular ion formation and pressure dependent mobility as well as finite temperature effects. We discuss the challenges associated with achieving suitable operating conditions, which lie beyond the capabilities of existing devices, using presently available or near-future manufacturing techniques.
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- 2022
6. Combination and summary of ATLAS dark matter searches interpreted in a 2HDM with a pseudo-scalar mediator using 139 fb−1 of [formula omitted] TeV pp collision data
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Aad, G., Abbott, B., Abeling, K., Abicht, N.J., Abidi, S.H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A.C., Acharya, B.S., Adam Bourdarios, C., Adamczyk, L., Adamek, L., Addepalli, S.V., Addison, M.J., Adelman, J., Adiguzel, A., Adye, T., Affolder, A.A., Afik, Y., Agaras, M.N., Agarwala, J., Aggarwal, A., Agheorghiesei, C., Ahmad, A., Ahmadov, F., Ahmed, W.S., Ahuja, S., Ai, X., Aielli, G., Aikot, A., Ait Tamlihat, M., Aitbenchikh, B., Aizenberg, I., Akbiyik, M., Åkesson, T.P.A., Akimov, A.V., Akiyama, D., Akolkar, N.N., Al Khoury, K., Alberghi, G.L., Albert, J., Albicocco, P., Albouy, G.L., Alderweireldt, S., Aleksa, M., Aleksandrov, I.N., Alexa, C., Alexopoulos, T., Alfonsi, F., Algren, M., Alhroob, M., Ali, B., Ali, H.M.J., Ali, S., Alibocus, S.W., Aliev, M., Alimonti, G., Alkakhi, W., Allaire, C., Allbrooke, B.M.M., Allen, J.F., Allendes Flores, C.A., Allport, P.P., Aloisio, A., Alonso, F., Alpigiani, C., Alvarez Estevez, M., Alvarez Fernandez, A., Alves Cardoso, M., Alviggi, M.G., Aly, M., Amaral Coutinho, Y., Ambler, A., Amelung, C., Amerl, M., Ames, C.G., Amidei, D., Amor Dos Santos, S.P., Amos, K.R., Ananiev, V., Anastopoulos, C., Andeen, T., Anders, J.K., Andrean, S.Y., Andreazza, A., Angelidakis, S., Angerami, A., Anisenkov, A.V., Annovi, A., Antel, C., Anthony, M.T., Antipov, E., Antonelli, M., Anulli, F., Aoki, M., Aoki, T., Aparisi Pozo, J.A., Aparo, M.A., Bella, L. Aperio, Appelt, C., Apyan, A., Aranzabal, N., Arcangeletti, C., Arce, A.T.H., Arena, E., Arguin, J.-F., Argyropoulos, S., Arling, J.-H., Arnaez, O., Arnold, H., Artoni, G., Asada, H., Asai, K., Asai, S., Asbah, N.A., Assahsah, J., Assamagan, K., Astalos, R., Atashi, S., Atkin, R.J., Atkinson, M., Atmani, H., Atmasiddha, P.A., Augsten, K., Auricchio, S., Auriol, A.D., Austrup, V.A., Avolio, G., Axiotis, K., Azuelos, G., Babal, D., Bachacou, H., Bachas, K., Bachiu, A., Backman, F., Badea, A., Bagnaia, P., Bahmani, M., Bailey, A.J., Bailey, V.R., Baines, J.T., Baines, L., Bakalis, C., Baker, O.K., Bakos, E., Bakshi Gupta, D., Balakrishnan, V., Balasubramanian, R., Baldin, E.M., Balek, P., Ballabene, E., Balli, F., Baltes, L.M., Balunas, W.K., Balz, J., Banas, E., Bandieramonte, M., Bandyopadhyay, A., Bansal, S., Barak, L., Barakat, M., Barberio, E.L., Barberis, D., Barbero, M., Barends, K.N., Barillari, T., Barisits, M.-S., Barklow, T., Baron, P., Baron Moreno, D.A., Baroncelli, A., Barone, G., Barr, A.J., Barr, J.D., Barranco Navarro, L., Barreiro, F., da Costa, J. Barreiro Guimarães, Barron, U., Barros Teixeira, M.G., Barsov, S., Bartels, F., Bartoldus, R., Barton, A.E., Bartos, P., Basan, A., Baselga, M., Bassalat, A., Basso, M.J., Basson, C.R., Bates, R.L., Batlamous, S., Batley, J.R., Batool, B., Battaglia, M., Battulga, D., Bauce, M., Bauer, M., Bauer, P., Bazzano Hurrell, L.T., Beacham, J.B., Beau, T., Beauchemin, P.H., Becherer, F., Bechtle, P., Beck, H.P., Becker, K., Beddall, A.J., Bednyakov, V.A., Bee, C.P., Beemster, L.J., Beermann, T.A., Begalli, M., Begel, M., Behera, A., Behr, J.K., Beirer, J.F., Beisiegel, F., Belfkir, M., Bella, G., Bellagamba, L., Bellerive, A., Bellos, P., Beloborodov, K., Belyaev, N.L., Benchekroun, D., Bendebba, F., Benhammou, Y., Benoit, M., Bensinger, J.R., Bentvelsen, S., Beresford, L., Beretta, M., Bergeaas Kuutmann, E., Berger, N., Bergmann, B., Beringer, J., Bernardi, G., Bernius, C., Bernlochner, F.U., Bernon, F., Berry, T., Berta, P., Berthold, A., Bertram, I.A., Bethke, S., Betti, A., Bevan, A.J., Bhamjee, M., Bhatta, S., Bhattacharya, D.S., Bhattarai, P., Bhopatkar, V.S., Bi, R., Bianchi, R.M., Bianco, G., Biebel, O., Bielski, R., Biglietti, M., Billoud, T.R.V., Bindi, M., Bingul, A., Bini, C., Biondini, A., Birch-sykes, C.J., Bird, G.A., Birman, M., Biros, M., Bisanz, T., Bisceglie, E., Biswas, D., Bitadze, A., Bjørke, K., Bloch, I., Blocker, C., Blue, A., Blumenschein, U., Blumenthal, J., Bobbink, G.J., Bobrovnikov, V.S., Boehler, M., Boehm, B., Bogavac, D., Bogdanchikov, A.G., Bohm, C., Boisvert, V., Bokan, P., Bold, T., Bomben, M., Bona, M., Boonekamp, M., Booth, C.D., Borbély, A.G., Bordulev, I.S., Borecka-Bielska, H.M., Borgna, L.S., Borissov, G., Bortoletto, D., Boscherini, D., Bosman, M., Bossio Sola, J.D., Bouaouda, K., Bouchhar, N., Boudreau, J., Bouhova-Thacker, E.V., Boumediene, D., Bouquet, R., Boveia, A., Boyd, J., Boye, D., Boyko, I.R., Bracinik, J., Brahimi, N., Brandt, G., Brandt, O., Braren, F., Brau, B., Brau, J.E., Brener, R., Brenner, L., Brenner, R., Bressler, S., Britton, D., Britzger, D., Brock, I., Brooijmans, G., Brooks, W.K., Brost, E., Brown, L.M., Bruce, L.E., Bruckler, T.L., de Renstrom, P.A. Bruckman, Brüers, B., Bruni, A., Bruni, G., Bruschi, M., Bruscino, N., Buanes, T., Buat, Q., Buchin, D., Buckley, A.G., Bugge, M.K., Bulekov, O., Bullard, B.A., Burdin, S., Burgard, C.D., Burger, A.M., Burghgrave, B., Burlayenko, O., Burr, J.T.P., Burton, C.D., Burzynski, J.C., Busch, E.L., Büscher, V., Bussey, P.J., Butler, J.M., Buttar, C.M., Butterworth, J.M., Buttinger, W., Buxo Vazquez, C.J., Buzykaev, A.R., Cabrera Urbán, S., Cadamuro, L., Caforio, D., Cai, H., Cai, Y., Cairo, V.M.M., Cakir, O., Calace, N., Calafiura, P., Calderini, G., Calfayan, P., Callea, G., Caloba, L.P., Calvet, D., Calvet, S., Calvet, T.P., Calvetti, M., Camacho Toro, R., Camarda, S., Camarero Munoz, D., Camarri, P., Camerlingo, M.T., Cameron, D., Camincher, C., Campanelli, M., Camplani, A., Canale, V., Canesse, A., Cantero, J., Cao, Y., Capocasa, F., Capua, M., Carbone, A., Cardarelli, R., Cardenas, J.C.J., Cardillo, F., Carli, T., Carlino, G., Carlotto, J.I., Carlson, B.T., Carlson, E.M., Carminati, L., Carnelli, A., Carnesale, M., Caron, S., Carquin, E., Carrá, S., Carratta, G., Carrio Argos, F., Carter, J.W.S., Carter, T.M., Casado, M.P., Caspar, M., Castiglia, E.G., Castillo, F.L., Castillo Garcia, L., Castillo Gimenez, V., Castro, N.F., Catinaccio, A., Catmore, J.R., Cavaliere, V., Cavalli, N., Cavasinni, V., Cekmecelioglu, Y.C., Celebi, E., Celli, F., Centonze, M.S., Cepaitis, V., Cerny, K., Cerqueira, A.S., Cerri, A., Cerrito, L., Cerutti, F., Cervato, B., Cervelli, A., Cesarini, G., Cetin, S.A., Chadi, Z., Chakraborty, D., Chan, J., Chan, W.Y., Chapman, J.D., Chapon, E., Chargeishvili, B., Charlton, D.G., Charman, T.P., Chatterjee, M., Chauhan, C., Chekanov, S., Chekulaev, S.V., Chelkov, G.A., Chen, A., Chen, B., Chen, H., Chen, J., Chen, M., Chen, S., Chen, S.J., Chen, X., Chen, Y., Cheng, C.L., Cheng, H.C., Cheong, S., Cheplakov, A., Cheremushkina, E., Cherepanova, E., El Moursli, R. Cherkaoui, Cheu, E., Cheung, K., Chevalier, L., Chiarella, V., Chiarelli, G., Chiedde, N., Chiodini, G., Chisholm, A.S., Chitan, A., Chitishvili, M., Chizhov, M.V., Choi, K., Chomont, A.R., Chou, Y., Chow, E.Y.S., Chowdhury, T., Chu, K.L., Chu, M.C., Chu, X., Chudoba, J., Chwastowski, J.J., Cieri, D., Ciesla, K.M., Cindro, V., Ciocio, A., Cirotto, F., Citron, Z.H., Citterio, M., Ciubotaru, D.A., Ciungu, B.M., Clark, A., Clark, P.J., Clavijo Columbie, J.M., Clawson, S.E., Clement, C., Clercx, J., Clissa, L., Coadou, Y., Cobal, M., Coccaro, A., Coelho Barrue, R.F., De Sa, R. Coelho Lopes, Coelli, S., Cohen, H., Coimbra, A.E.C., Cole, B., Collot, J., Conde Muiño, P., Connell, M.P., Connell, S.H., Connelly, I.A., Conroy, E.I., Conventi, F., Cooke, H.G., Cooper-Sarkar, A.M., Cordeiro Oudot Choi, A., Cormier, F., Corpe, L.D., Corradi, M., Corriveau, F., Cortes-Gonzalez, A., Costa, M.J., Costanza, F., Costanzo, D., Cote, B.M., Cowan, G., Cranmer, K., Cremonini, D., Crépé-Renaudin, S., Crescioli, F., Cristinziani, M., Cristoforetti, M., Croft, V., Crosby, J.E., Crosetti, G., Cueto, A., Cuhadar Donszelmann, T., Cui, H., Cui, Z., Cunningham, W.R., Curcio, F., Czodrowski, P., Czurylo, M.M., De Sousa, M.J. Da Cunha Sargedas, Pinto, J.V. Da Fonseca, Da Via, C., Dabrowski, W., Dado, T., Dahbi, S., Dai, T., Santo, D. Dal, Dallapiccola, C., Dam, M., D’amen, G., D’Amico, V., Damp, J., Dandoy, J.R., Daneri, M.F., Danninger, M., Dao, V., Darbo, G., Darmora, S., Das, S.J., D’Auria, S., David, C., Davidek, T., Davis-Purcell, B., Dawson, I., Day-hall, H.A., De, K., De Asmundis, R., De Biase, N., De Castro, S., De Groot, N., de Jong, P., De la Torre, H., De Maria, A., De Salvo, A., De Sanctis, U., De Santo, A., De Regie, J.B. De Vivie, Dedovich, D.V., Degens, J., Deiana, A.M., Del Corso, F., Del Peso, J., Del Rio, F., Deliot, F., Delitzsch, C.M., Della Pietra, M., Della Volpe, D., Dell’Acqua, A., Dell’Asta, L., Delmastro, M., Delsart, P.A., Demers, S., Demichev, M., Denisov, S.P., D’Eramo, L., Derendarz, D., Derue, F., Dervan, P., Desch, K., Deutsch, C., Di Bello, F.A., Di Ciaccio, A., Di Ciaccio, L., Di Domenico, A., Di Donato, C., Di Girolamo, A., Di Gregorio, G., Di Luca, A., Di Micco, B., Di Nardo, R., Diaconu, C., Diamantopoulou, M., Dias, F.A., Do Vale, T. Dias, Diaz, M.A., Diaz Capriles, F.G., Didenko, M., Diehl, E.B., Diehl, L., Díez Cornell, S., Diez Pardos, C., Dimitriadi, C., Dimitrievska, A., Dingfelder, J., Dinu, I.-M., Dittmeier, S.J., Dittus, F., Djama, F., Djobava, T., Djuvsland, J.I., Doglioni, C., Dohnalova, A., Dolejsi, J., Dolezal, Z., Donadelli, M., Dong, B., Donini, J., D’Onofrio, A., D’Onofrio, M., Dopke, J., Doria, A., Dos Santos Fernandes, N., Dougan, P., Dova, M.T., Doyle, A.T., Draguet, M.A., Dreyer, E., Drivas-koulouris, I., Drobac, A.S., Drozdova, M., Du, D., du Pree, T.A., Dubinin, F., Dubovsky, M., Duchovni, E., Duckeck, G., Ducu, O.A., Duda, D., Dudarev, A., Duden, E.R., D’uffizi, M., Duflot, L., Dührssen, M., Dülsen, C., Dumitriu, A.E., Dunford, M., Dungs, S., Dunne, K., Duperrin, A., Duran Yildiz, H., Düren, M., Durglishvili, A., Dwyer, B.L., Dyckes, G.I., Dyndal, M., Dysch, S., Dziedzic, B.S., Earnshaw, Z.O., Eberwein, G.H., Eckerova, B., Eggebrecht, S., De Souza, E. Egidio Purcino, Ehrke, L.F., Eigen, G., Einsweiler, K., Ekelof, T., Ekman, P.A., El Farkh, S., El Ghazali, Y., El Jarrari, H., El Moussaouy, A., Ellajosyula, V., Ellert, M., Ellinghaus, F., Elliot, A.A., Ellis, N., Elmsheuser, J., Elsing, M., Emeliyanov, D., Enari, Y., Ene, I., Epari, S., Erdmann, J., Erland, P.A., Errenst, M., Escalier, M., Escobar, C., Etzion, E., Evans, G., Evans, H., Evans, L.S., Evans, M.O., Ezhilov, A., Ezzarqtouni, S., Fabbri, F., Fabbri, L., Facini, G., Fadeyev, V., Fakhrutdinov, R.M., Falciano, S., Falda Ulhoa Coelho, L.F., Falke, P.J., Faltova, J., Fan, C., Fan, Y., Fang, Y., Fanti, M., Faraj, M., Farazpay, Z., Farbin, A., Farilla, A., Farooque, T., Farrington, S.M., Fassi, F., Fassouliotis, D., Faucci Giannelli, M., Fawcett, W.J., Fayard, L., Federic, P., Federicova, P., Fedin, O.L., Fedotov, G., Feickert, M., Feligioni, L., Fellers, D.E., Feng, C., Feng, M., Feng, Z., Fenton, M.J., Fenyuk, A.B., Ferencz, L., Ferguson, R.A.M., Fernandez Luengo, S.I., Fernoux, M.J.V., Ferrando, J., Ferrari, A., Ferrari, P., Ferrari, R., Ferrere, D., Ferretti, C., Fiedler, F., Filipčič, A., Filmer, E.K., Filthaut, F., Fiolhais, M.C.N., Fiorini, L., Fisher, W.C., Fitschen, T., Fitzhugh, P.M., Fleck, I., Fleischmann, P., Flick, T., Flores, M., Flores Castillo, L.R., De Acedo, L. Flores Sanz, Follega, F.M., Fomin, N., Foo, J.H., Forland, B.C., Formica, A., Forti, A.C., Fortin, E., Fortman, A.W., Foti, M.G., Fountas, L., Fournier, D., Fox, H., Francavilla, P., Francescato, S., Franchellucci, S., Franchini, M., Franchino, S., Francis, D., Franco, L., Franconi, L., Franklin, M., Frattari, G., Freegard, A.C., Freund, W.S., Frid, Y.Y., Friend, J., Fritzsche, N., Froch, A., Froidevaux, D., Frost, J.A., Fu, Y., Fujimoto, M., Fullana Torregrosa, E., Fung, K.Y., Furtado De Simas Filho, E., Furukawa, M., Fuster, J., Gabrielli, A., Gadow, P., Gagliardi, G., Gagnon, L.G., Gallas, E.J., Gallop, B.J., Gan, K.K., Ganguly, S., Gao, J., Gao, Y., Garay Walls, F.M., Garcia, B., García, C., Garcia Alonso, A., Garcia Caffaro, A.G., García Navarro, J.E., Garcia-Sciveres, M., Gardner, G.L., Gardner, R.W., Garelli, N., Garg, D., Garg, R.B., Gargan, J.M., Garner, C.A., Gasiorowski, S.J., Gaspar, P., Gaudio, G., Gautam, V., Gauzzi, P., Gavrilenko, I.L., Gavrilyuk, A., Gay, C., Gaycken, G., Gazis, E.N., Geanta, A.A., Gee, C.M., Gemme, C., Genest, M.H., Gentile, S., George, S., George, W.F., Geralis, T., Gessinger-Befurt, P., Geyik, M.E., Ghani, M., Ghneimat, M., Ghorbanian, K., Ghosal, A., Ghosh, A., Giacobbe, B., Giagu, S., Giani, T., Giannetti, P., Giannini, A., Gibson, S.M., Gignac, M., Gil, D.T., Gilbert, A.K., Gilbert, B.J., Gillberg, D., Gilles, G., Gillwald, N.E.K., Ginabat, L., Gingrich, D.M., Giordani, M.P., Giraud, P.F., Giugliarelli, G., Giugni, D., Giuli, F., Gkialas, I., Gladilin, L.K., Glasman, C., Gledhill, G.R., Glemža, G., Glisic, M., Gnesi, I., Go, Y., Goblirsch-Kolb, M., Gocke, B., Godin, D., Gokturk, B., Goldfarb, S., Golling, T., Gololo, M.G.D., Golubkov, D., Gombas, J.P., Gomes, A., Da Silva, G. Gomes, Gomez Delegido, A.J., Gonçalo, R., Gonella, G., Gonella, L., Gongadze, A., Gonnella, F., Gonski, J.L., González Andana, R.Y., de la Hoz, S. 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Zamora, Zang, J., Zanzi, D., Zaplatilek, O., Zeitnitz, C., Zeng, H., Zeng, J.C., Zenger, D.T., Jr, Zenin, O., Ženiš, T., Zenz, S., Zerradi, S., Zerwas, D., Zhai, M., Zhang, B., Zhang, D.F., Zhang, J., Zhang, K., Zhang, L., Zhang, P., Zhang, R., Zhang, S., Zhang, T., Zhang, X., Zhang, Y., Zhang, Z., Zhao, H., Zhao, P., Zhao, T., Zhao, Y., Zhao, Z., Zhemchugov, A., Zheng, J., Zheng, K., Zheng, X., Zheng, Z., Zhong, D., Zhou, B., Zhou, H., Zhou, N., Zhou, Y., Zhu, C.G., Zhu, J., Zhu, Y., Zhuang, X., Zhukov, K., Zhulanov, V., Zimine, N.I., Zinsser, J., Ziolkowski, M., Živković, L., Zoccoli, A., Zoch, K., Zorbas, T.G., Zormpa, O., Zou, W., and Zwalinski, L.
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- 2024
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7. The effect of phosphorous content on the microstructure and localised corrosion of electroless nickel-coated copper
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Mousavi, M., Rahimi, E., Mol, J.M.C., and Gonzalez-Garcia, Y.
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- 2024
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8. Rotational complexity increases cropping system output under poorer growing conditions
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Bybee-Finley, K. Ann, Muller, Katherine, White, Kathryn E., Cavigelli, Michel A., Han, Eunjin, Schomberg, Harry H., Snapp, Sieglinde, Viens, Frederi, Correndo, Adrian A., Deiss, Leonardo, Fonteyne, Simon, Garcia y Garcia, Axel, Gaudin, Amélie C.M., Hooker, David C., Janovicek, Ken, Jin, Virginia, Johnson, Gregg, Karsten, Heather, Liebman, Matt, McDaniel, Marshall D., Sanford, Gregg, Schmer, Marty R., Strock, Jeffrey, Sykes, Virginia R., Verhulst, Nele, Wilke, Brook, and Bowles, Timothy M.
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- 2024
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9. Neutral Bremsstrahlung emission in xenon unveiled
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Henriques, C. A. O., Amedo, P., Teixeira, J. M. R., Gonzalez-Diaz, D., Azevedo, C. D. R., Para, A., Martin-Albo, J., Hernandez, A. Saa, Gomez-Cadenas, J. J., Nygren, D. R., Monteiro, C. M. B., Adams, C., Alvarez, V., Arazi, L., Arnquist, I. J., Bailey, K., Ballester, F., Benlloch-Rodriguez, J. M., Borges, F. I. G. M., Byrnes, N., Carcel, S., Carrion, J. V., Cebrian, S., Church, E., Conde, C. A. N., Contreras, T., Diaz, G., Diaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Generowicz, J., Ghosh, S., Goldschmidt, A., Guenette, R., Gutierrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Lebrun, P., Lopez-March, N., Losada, M., Mano, R. D. P., Martinez, A., Martinez-Vara, M., Martinez-Lema, G., McDonald, A. D., Monrabal, F., Mora, F. J., Vidal, J. Munoz, Novella, P., Palmeiro, B., Perez, J., Querol, M., Redwine, A. B., Renner, J., Repond, J., Riordan, S., Ripoll, L., Garcia, Y. Rodriguez, Rodriguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simon, A., Sofka, C., Sorel, M., Stiegler, T., Toledo, J. F., Torrent, J., Uson, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., Woodruff, K., and Yahlali, N.
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Physics - Instrumentation and Detectors ,Astrophysics - Instrumentation and Methods for Astrophysics ,Physics - Atomic Physics - Abstract
We present evidence of non-excimer-based secondary scintillation in gaseous xenon, obtained using both the NEXT-White TPC and a dedicated setup. Detailed comparison with first-principle calculations allows us to assign this scintillation mechanism to neutral bremsstrahlung (NBrS), a process that has been postulated to exist in xenon that has been largely overlooked. For photon emission below 1000 nm, the NBrS yield increases from about 10$^{-2}$ photon/e$^{-}$ cm$^{-1}$ bar$^{-1}$ at pressure-reduced electric field values of 50 V cm$^{-1}$ bar$^{-1}$ to above 3$\times$10$^{-1}$ photon/e$^{-}$ cm$^{-1}$ bar$^{-1}$ at 500 V cm$^{-1}$ bar$^{-1}$. Above 1.5 kV cm$^{-1}$ bar$^{-1}$, values that are typically employed for electroluminescence, it is estimated that NBrS is present with an intensity around 1 photon/e$^{-}$ cm$^{-1}$ bar$^{-1}$, which is about two orders of magnitude lower than conventional, excimer-based electroluminescence. Despite being fainter than its excimeric counterpart, our calculations reveal that NBrS causes luminous backgrounds that can interfere, in either gas or liquid phase, with the ability to distinguish and/or to precisely measure low primary-scintillation signals (S1). In particular, we show this to be the case in the "buffer" and "veto" regions, where keeping the electric field below the electroluminescence (EL) threshold will not suffice to extinguish secondary scintillation. The electric field in these regions should be chosen carefully to avoid intolerable levels of NBrS emission. Furthermore, we show that this new source of light emission opens up a viable path towards obtaining S2 signals for discrimination purposes in future single-phase liquid TPCs for neutrino and dark matter physics, with estimated yields up to 20-50 photons/e$^{-}$ cm$^{-1}$., Comment: Published in Physical Review X
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- 2022
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10. Ba$^{2+}$ ion trapping by organic submonolayer: towards an ultra-low background neutrinoless double beta decay detector
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Herrero-Gómez, P., Calupitan, J. P., Ilyn, M., Berdonces-Layunta, A., Wang, T., de Oteyza, D. G., Corso, M., González-Moreno, R., Rivilla, I., Aparicio, B., Aranburu, A. I., Freixa, Z., Monrabal, F., Cossío, F. P., Gómez-Cadenas, J. J., Rogero, C., Adams, C., Almazán, H., Alvarez, V., Arazi, L., Arnquist, I. J., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Denisenko, A. A., Díaz, G., Díaz, J., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Generowicz, J., Goldschmidt, A., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, V., Ho, J., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Larizgoitia, L., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Martínez-Vara, M., McDonald, A. D., Meziani, Z. E., Mistry, K., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Navarro, K., Novella, P., Nygren, D. R., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Raymond, A., Redwine, A. B., Renner, J., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sorel, M., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Vuong, T. T., Webb, R., White, J. T., Woodruff, K., and Yahlali, N.
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High Energy Physics - Experiment ,Condensed Matter - Materials Science ,Physics - Chemical Physics - Abstract
If neutrinos are their own antiparticles, the otherwise-forbidden nuclear reaction known as neutrinoless double beta decay ($\beta\beta 0\nu$) can occur, with a characteristic lifetime which is expected to be very long, making the suppression of backgrounds a daunting task. It has been shown that detecting (``tagging'') the Ba$^{+2}$ dication produced in the double beta decay ${}^{136}\mathrm{Xe} \rightarrow {}^{136}$Ba$^{+2}+ 2 e + (2 \nu)$ in a high pressure gas experiment, could lead to a virtually background free experiment. To identify these \Bapp, chemical sensors are being explored as a key tool by the NEXT collaboration . Although used in many fields, the application of such chemosensors to the field of particle physics is totally novel and requires experimental demonstration of their suitability in the ultra-dry environment of a xenon gas chamber. Here we use a combination of complementary surface science techniques to unambiguously show that Ba$^{+2}$ ions can be trapped (chelated) in vacuum by an organic molecule, the so-called fluorescent bicolour indicator (FBI) (one of the chemosensors developed by NEXT), immobilized on a surface. We unravel the ion capture mechanism once the molecules are immobilised on Au(111) surface and explain the origin of the emission fluorescence shift associated to the trapping of different ions. Moreover, we prove that chelation also takes place on a technologically relevant substrate, as such, demonstrating the feasibility of using FBI indicators as building blocks of a Ba$^{+2}$ detector.
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- 2022
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11. Measurement of the ${}^{136}$Xe two-neutrino double beta decay half-life via direct background subtraction in NEXT
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NEXT Collaboration, Novella, P., Sorel, M., Usón, A., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Cossío, F. P., Denisenko, A. A., Díaz, G., Díaz, J., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Ho, J., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Larizgoitia, L., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Martínez-Vara, M., McDonald, A. D., Meziani, Z. E., Mistry, K., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Navarro, K., Nygren, D. R., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Raymond, A., Redwine, A. B., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Veloso, J. F. C. A., Vuong, T. T., Webb, R., White, J. T., Woodruff, K., and Yahlali, N.
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Nuclear Experiment ,High Energy Physics - Experiment ,Physics - Instrumentation and Detectors - Abstract
We report a measurement of the half-life of the ${}^{136}$Xe two-neutrino double beta decay performed with a novel direct background subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with ${}^{136}$Xe-enriched and ${}^{136}$Xe-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-life of $2.34^{+0.80}_{-0.46}\textrm{(stat)}^{+0.30}_{-0.17}\textrm{(sys)}\times10^{21}~\textrm{yr}$ is derived from the background-subtracted energy spectrum. The presented technique demonstrates the feasibility of unique background-model-independent neutrinoless double beta decay searches., Comment: 9 pages, 7 figures, and 1 appendix
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- 2021
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12. The Dynamics of Ions on Phased Radio-frequency Carpets in High Pressure Gases and Application for Barium Tagging in Xenon Gas Time Projection Chambers
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NEXT Collaboration, Jones, B. J. P., Raymond, A., Woodruff, K., Byrnes, N., Denisenko, A. A., Foss, F. W., Navarro, K., Nygren, D. R., Vuong, T. T., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Cossío, F. P., Díaz, G., Díaz, J., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Freixa, Z, Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Hernando~Morata, J. A., Herrero-Gómez, P., Herrero, V., Ho, J., Ifergan, Y., Kekic, M., Labarga, L., Laing, A., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Martínez-Vara, M., McDonald, A. D., Meziani, Z. E., Mistry, K., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A. B., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sorel, M., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., and Yahlali, N.
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Physics - Instrumentation and Detectors ,Nuclear Experiment - Abstract
Radio-frequency (RF) carpets with ultra-fine pitches are examined for ion transport in gases at atmospheric pressures and above. We develop new analytic and computational methods for modeling RF ion transport at densities where dynamics are strongly influenced by buffer gas collisions. An analytic description of levitating and sweeping forces from phased arrays is obtained, then thermodynamic and kinetic principles are used to calculate ion loss rates in the presence of collisions. This methodology is validated against detailed microscopic SIMION simulations. We then explore a parameter space of special interest for neutrinoless double beta decay experiments: transport of barium ions in xenon at pressures from 1 to 10 bar. Our computations account for molecular ion formation and pressure dependent mobility as well as finite temperature effects. We discuss the challenges associated with achieving suitable operating conditions, which lie beyond the capabilities of existing devices, using presently available or near-future manufacturing techniques., Comment: 26 pages, 16 figures v2: author list update and pre-journal submission adjustments
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- 2021
13. El estrés calórico afecta a las hembras ovinas Blackbelly durante el verano en el trópico
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Ethel Caterina García y González, Blanca Celia Pineda-Burgos, Maricela Ruiz-Ortega, Cesar Cortez-Romero, Marisol Paredes-Alvarado, and José Luis Ponce-Covarrubias
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Ovejas multíparas ,termorregulación ,corderas ,índice de temperatura y humedad ,hemoglobina ,hematocrito ,Veterinary medicine ,SF600-1100 - Abstract
Objetivo. Determinar si las hembras ovinas Blackbelly son afectadas por el estrés calórico (EC) durante el verano en un clima tropical. Materiales y métodos. En el experimento, 21 hembras ovinas fueron divididas en dos tratamientos (T1=7 corderas y T2=14 ovejas multíparas) para evaluar el efecto del EC a través del índice de temperatura y humedad (ITH), variables fisiológicas y hematológicas. Resultados. En el experimento se encontró un ITH de entre 77 y 88 U. Asimismo, la frecuencia respiratoria (FR) fue mayor en el T2 por la tarde (117 rpm) que por la mañana (114 rpm) (p
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- 2024
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14. Measurement of the Xe136 two-neutrino double-β-decay half-life via direct background subtraction in NEXT
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Novella, P, Sorel, M, Usón, A, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arazi, L, Arnquist, IJ, Ayet, S, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Bounasser, S, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Cossío, FP, Denisenko, AA, Díaz, G, Díaz, J, Dickel, T, Escada, J, Esteve, R, Fahs, A, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, FW, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Morata, JA Hernando, Herrero-Gómez, P, Herrero, V, Ho, J, Ifergan, Y, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Larizgoitia, L, Lebrun, P, Gutierrez, D Lopez, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, Martínez-Vara, M, McDonald, AD, Meziani, ZE, Mistry, K, Monrabal, F, Monteiro, CMB, Mora, FJ, Vidal, J Muñoz, Navarro, K, Nygren, DR, Oblak, E, Odriozola-Gimeno, M, Palmeiro, B, Para, A, Pérez, J, Querol, M, Raymond, A, Redwine, AB, Renner, J, Ripoll, L, Rivilla, I, García, Y Rodríguez, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Stanford, C, and Teixeira, JMR
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Nuclear and Plasma Physics ,Particle and High Energy Physics ,Physical Sciences ,Nuclear and plasma physics - Abstract
We report a measurement of the half-life of the Xe136 two-neutrino double-β decay performed with a novel direct-background-subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with Xe136-enriched and Xe136-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-life of 2.34-0.46+0.80(stat)-0.17+0.30(sys)×1021yr is derived from the background-subtracted energy spectrum. The presented technique demonstrates the feasibility of unique background-model-independent neutrinoless double-β-decay searches.
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- 2022
15. Neutral Bremsstrahlung Emission in Xenon Unveiled
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Henriques, CAO, Amedo, P, Teixeira, JMR, González-Díaz, D, Azevedo, CDR, Para, A, Martín-Albo, J, Hernandez, A Saa, Gómez-Cadenas, JJ, Nygren, DR, Monteiro, CMB, Adams, C, Álvarez, V, Arazi, L, Arnquist, IJ, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Díaz, G, Díaz, J, Diesburg, M, Escada, J, Esteve, R, Felkai, R, Fernandes, AFM, Fernandes, LMP, Ferrario, P, Ferreira, AL, Freitas, EDC, Generowicz, J, Ghosh, S, Goldschmidt, A, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Morata, JA Hernando, Herrero, P, Herrero, V, Ifergan, Y, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martínez, A, Martínez-Vara, M, Martínez-Lema, G, McDonald, AD, Monrabal, F, Mora, FJ, Vidal, J Muñoz, Novella, P, Palmeiro, B, Pérez, J, Querol, M, Redwine, AB, Renner, J, Repond, J, Riordan, S, Ripoll, L, García, Y Rodríguez, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sofka, C, Sorel, M, Stiegler, T, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, and Yahlali, N
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Nuclear and Plasma Physics ,Physical Sciences ,Astronomical and Space Sciences ,Condensed Matter Physics ,Quantum Physics ,Physical sciences - Abstract
We present evidence of non-excimer-based secondary scintillation in gaseous xenon, obtained using both the NEXT-White time projection chamber (TPC) and a dedicated setup. Detailed comparison with first-principle calculations allows us to assign this scintillation mechanism to neutral bremsstrahlung (NBrS), a process that is postulated to exist in xenon that has been largely overlooked. For photon emission below 1000 nm, the NBrS yield increases from about 10-2 photon/e- cm-1 bar-1 at pressure-reduced electric field values of 50 V cm-1 bar-1 to above 3×10-1 photon/e- cm-1 bar-1 at 500 V cm-1 bar-1. Above 1.5 kV cm-1 bar-1, values that are typically employed for electroluminescence, it is estimated that NBrS is present with an intensity around 1 photon/e- cm-1 bar-1, which is about 2 orders of magnitude lower than conventional, excimer-based electroluminescence. Despite being fainter than its excimeric counterpart, our calculations reveal that NBrS causes luminous backgrounds that can interfere, in either gas or liquid phase, with the ability to distinguish and/or to precisely measure low primary-scintillation signals (S1). In particular, we show this to be the case in the "buffer"region, where keeping the electric field below the electroluminescence threshold does not suffice to extinguish secondary scintillation. The electric field leakage in this region should be mitigated to avoid intolerable levels of NBrS emission. Furthermore, we show that this new source of light emission opens up a viable path toward obtaining S2 signals for discrimination purposes in future single-phase liquid TPCs for neutrino and dark matter physics, with estimated yields up to 20-50 photons/e- cm-1.
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- 2022
16. Boosting background suppression in the NEXT experiment through Richardson-Lucy deconvolution
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Simón, A., Ifergan, Y., Redwine, A. B., Weiss-Babai, R., Arazi, L., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Cossío, F. P., Denisenko, A. A., Díaz, G., Díaz, J., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., González-Díaz, D., Gosh, S., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ho, J., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Vara, M., Martínez-Lema, G., McDonald, A. D., Meziani, Z. -E., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Newhouse, C., Novella, P., Nygren, D. R., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Sorel, M., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Vuong, T. T., Webb, R., White, J. T., Woodruff, K., and Yahlali, N.
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Physics - Instrumentation and Detectors ,High Energy Physics - Experiment - Abstract
Next-generation neutrinoless double beta decay experiments aim for half-life sensitivities of ~$10^{27}$ yr, requiring suppressing backgrounds to <1 count/tonne/yr. For this, any extra background rejection handle, beyond excellent energy resolution and the use of extremely radiopure materials, is of utmost importance. The NEXT experiment exploits differences in the spatial ionization patterns of double beta decay and single-electron events to discriminate signal from background. While the former display two Bragg peak dense ionization regions at the opposite ends of the track, the latter typically have only one such feature. Thus, comparing the energies at the track extremes provides an additional rejection tool. The unique combination of the topology-based background discrimination and excellent energy resolution (1% FWHM at the Q-value of the decay) is the distinguishing feature of NEXT. Previous studies demonstrated a topological background rejection factor of ~5 when reconstructing electron-positron pairs in the $^{208}$Tl 1.6 MeV double escape peak (with Compton events as background), recorded in the NEXT-White demonstrator at the Laboratorio Subterr\'aneo de Canfranc, with 72% signal efficiency. This was recently improved through the use of a deep convolutional neural network to yield a background rejection factor of ~10 with 65% signal efficiency. Here, we present a new reconstruction method, based on the Richardson-Lucy deconvolution algorithm, which allows reversing the blurring induced by electron diffusion and electroluminescence light production in the NEXT TPC. The new method yields highly refined 3D images of reconstructed events, and, as a result, significantly improves the topological background discrimination. When applied to real-data 1.6 MeV $e^-e^+$ pairs, it leads to a background rejection factor of 27 at 57% signal efficiency., Comment: Submitted to JHEP
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- 2021
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17. Effect of Heat Stress on Lactating and Non-Lactating Blackbelly Ewes under Tropical Conditions during Summer
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Edgar Valencia-Franco, Ethel Caterina García y González, Aurora Matilde Guevara-Arroyo, Fernando Torres-Agatón, José Manuel Robles-Robles, José del Carmen Rodríguez-Castillo, Marisol Paredes-Alvarado, Luis Alaniz-Gutiérrez, Maricela Ruiz-Ortega, and José Luis Ponce-Covarrubias
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greenhouse effect ,climate change ,environmental temperature ,RH ,thermoregulation ,skin temperatures ,Veterinary medicine ,SF600-1100 ,Zoology ,QL1-991 - Abstract
Two groups of ewes (10 lactating and 10 non-lactating) were used to evaluate the effect of heat stress during summer under tropical conditions. In this study, a temperature and humidity index (THI) was found that ranged between 65 and 79 (morning and afternoon). Likewise, a heat tolerance coefficient (HTC) of 6 units was observed. The highest breathing frequency (BF; 115.46 ± 35.25 breaths per minute (bpm)) and rectal temperature (RT; 38.95 ± 0.51 °C) were found during the afternoon in the group of lactating ewes. The means were compared by group, time of the day, and interaction, and only significant differences were found between groups for RT and udder temperature (p < 0.001). In the case of time of day, all parameters were higher during the afternoon, regardless of the group of ewes (p < 0.001). Likewise, an interaction was found in the parameters RT, right paralumbar fossa (RPF), rump, leg, and udder (p < 0.001). In conclusion, Blackbelly ewes lactating during the summer in the tropics have higher skin temperatures, and also raise BF and RT to tolerate HS in tropical climates.
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- 2024
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18. Annual Sexual Behavior in Boer Bucks Located in the Guerrero Tropics in Mexico
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José Luis Ponce-Covarrubias, Ethel Caterina García y González, Blanca Celia Pineda-Burgos, Aurora Matilde Guevara-Arroyo, Pedro Enrique Hernández-Ruiz, Fernando Torres-Agatón, Maricela Ruiz-Ortega, Marisol Paredes-Alvarado, José Manuel Robles-Robles, José del Carmen Rodríguez-Castillo, Oscar Ángel-García, and Edgar Valencia-Franco
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annual sexual response ,body weight ,odor intensity ,testicular circumference ,vocalizations ,sexual rest ,Nutrition. Foods and food supply ,TX341-641 - Abstract
The aim of this study was to evaluate the intensity of the annual sexual behavior (SB) of Boer bucks under tropical conditions in southern Mexico. For one year, 16 extensively grazing males were evaluated for SB individually with estrogenized goats. From the beginning of the experiment and every 30 days, body weight (BW), body condition (BC), testicular circumference (TC), odor intensity (OI), and SB (nudging, ano-genital sniffing, flehmen, mounting attempts, mounts with intromission, and self-urination) were recorded. The bucks showed more intense SB during the months of November to May than during the months of June to October (p < 0.05). Greater frequencies were found for nudging, ano-genital sniffing, mounting attempts, and self-urination in the months of November to May (p < 0.001). BW was lower during the months of January to August than in the months of September to December (p < 0.05). On the other hand, TC increased from October to December (p < 0.05). Similarly, the OI in males varied over time (time effect; p < 0.001). In fact, an increased odor was found from October to December. The conclusions are that breed male goats from the tropics of Guerrero have a more intense SB during the months of November to May, but TC, OI, BW, and BC correspond to the time of the year when forage availability is the greatest.
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- 2023
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19. Primary Hepatic Leiomyosarcoma (PHL) with pulmonary metastatic activity. Case report and literature review
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Monserrat M. Munguía-Guízar, Jocelyn Serrano-Casas, Víctor H. García-y-García, Guadalupe C. Che-Cantun, and Eduardo Fragoso-Pérez
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Specialties of internal medicine ,RC581-951 - Abstract
Introduction and Objectives: Sarcomas from the liver are rare, constituting only 1%-2% of all primary hepatic malignant tumors. Leiomyosarcoma accounts for 8%-10% of all hepatic sarcomas. However, these are generally metastatic tumors, arising from the GI tract, uterus, retroperitoneum, or lungs. So far, less than 100 cases of primary hepatic leiomyosarcoma (PHL) have been reported in the literature. PHL is a rare mesenchymal hepatic tumor whose clinical manifestations are often nonspecific and remain asymptomatic until there is a significant increase in tumor size, causing a mass effect. Furthermore, alpha-fetoprotein and other serological markers are usually normal. Thus, histological examination is the only way to achieve the diagnosis. The pathological features of leiomyosarcoma include spindle-shaped cells, abundant cytoplasm, nuclear atypia, and the presence of mitotic figures. Immunohistochemical staining of tumors is positive for vimentin, desmin and actin, and negative for a-fetoprotein, CD34, CD117, cytokeratin, and hepatocytes.No risk factors have yet been identified. Interestingly, many of these tumors occur in immunocompromised individuals, such as post-transplantation and AIDS patients. This is postulated to be secondary to the effect of the uninhibited Epstein-Barr virus (EBV) on smooth muscle proliferation and previously treated Hodgkin's lymphoma. However, patients without any predisposing condition have also been described in the literature.Surgical resection is considered to be the only potentially curative treatment. Standard chemotherapies (doxorubicin, ifosfamide; gemcitabine and docetaxel) have modest activity with single‐agent and combination response rates of 10%-20% and 17%-40%, respectively. Materials and Patients: A 43-year-old male with a history of alcoholism consuming 135 g/week for three years, smoking index of 1.8 packs/year, and six years diagnosis with type 2 diabetes mellitus. The clinical presentation started with pain in the upper right quadrant, nocturnal diaphoresis, and weight loss, progressing to hiccups, nausea, and vomiting. Results: Dynamic CT revealed an irregular heterogeneous liver tumor involving the entire right lobe, with attenuation ranging from 7-45 HU in the non-contrast phase, showing heterogeneous enhancement in arterial phase up to 138 HU, with hypodense areas suggestive of necrosis, isodense to the parenchyma in the portal and delayed phases, measuring 174 × 138 × 170 mm. There were adenopathies and pulmonary nodules, the largest measuring 7.3 × 6.2 mm. Liver biochemistry and tumor markers AFP, Ca 19-9, and CEA were within normal limits. Liver biopsy revealed a malignant mesenchymal neoplasm composed of spindle cells with nuclear pleomorphism and atypical mitotic figures within the hepatic parenchyma. Immunohistochemistry showed positive staining for smooth muscle actin, desmin, calponin, DOG1, and negative for CD34, cytokeratin, CD117, ACE, consistent with leiomyosarcoma. Conclusions: Palliative chemotherapy with doxorubicin and ifosfamide was initiated in 2021. A year later, clinical evolution ECOG 1, but follow-up CT showed a lesion measuring 314 × 159 × 155mm, leading to the decision for supportive care.
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- 2024
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20. Co-diseño de servicios para personas mayores: Retos y reflexiones
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Annika Maya-Rivero and Ana Paula García y Colomé
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brecha generacional ,diseño ,gerontología ,envejecimiento ,interacción social ,Political science ,International relations ,JZ2-6530 - Abstract
Desde la solidaridad intergeneracional se analizan los efectos colaterales de un proyecto de co-diseño de servicios para personas mayores, realizado en el Centro de Investigaciones de Diseño Industrial de la Universidad Nacional Autónoma de México (UNAM). Participaron estudiantes de la asignatura de diseño de servicios y mujeres mayores. Objetivo: conocer los efectos colaterales de la experiencia vivida durante el proyecto de co-diseño. A través de un análisis cualitativo se encontraron los efectos colaterales para las personas mayores: pasar de la incertidumbre a la seguridad, redescubrir a los jóvenes, abrirse al cambio, experimentar roles complementarios, fortalecer la disciplina y la constancia, disminuir la brecha tecnológica y sentirse visibles para la sociedad. Para los estudiantes: trabajar la comunicación asertiva así como los procesos analíticos y contar con el usuario de manera tangible y real.
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- 2024
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21. Demonstration of background rejection using deep convolutional neural networks in the NEXT experiment
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NEXT Collaboration, Kekic, M., Adams, C., Woodruff, K., Renner, J., Church, E., Del Tutto, M., Morata, J. A. Hernando, Gomez-Cadenas, J. J., Alvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodriguez, J. M., Borges, F. I. G. M., Byrnes, N., Carcel, S., Carrion, J. V., Cebrian, S., Conde, C. A. N., Contreras, T., Diaz, G., Diaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Generowicz, J., Ghosh, S., Goldschmidt, A., Gonzalez-Diaz, D., Guenette, R., Gutierrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Herrero, P., Herrero, V., Ifergan, Y., Jones, B. J. P., Labarga, L., Laing, A., Lebrun, P., Lopez-March, N., Losada, M., Mano, R. D. P., Martin-Albo, J., Martinez, A., Martinez-Lema, G., Martinez-Vara, M., McDonald, A. D., Meziani, Z. E., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Perez, J., Querol, M., Redwine, A. B., Ripoll, L., Garcia, Y. Rodriguez, Rodriguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simon, A., Sofka, C., Sorel, M., Stiegler, T., Toledo, J. F., Torrent, J., Uson, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., and Yahlali, N.
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Physics - Instrumentation and Detectors ,High Energy Physics - Experiment - Abstract
Convolutional neural networks (CNNs) are widely used state-of-the-art computer vision tools that are becoming increasingly popular in high energy physics. In this paper, we attempt to understand the potential of CNNs for event classification in the NEXT experiment, which will search for neutrinoless double-beta decay in $^{136}$Xe. To do so, we demonstrate the usage of CNNs for the identification of electron-positron pair production events, which exhibit a topology similar to that of a neutrinoless double-beta decay event. These events were produced in the NEXT-White high-pressure xenon TPC using 2.6-MeV gamma rays from a $^{228}$Th calibration source. We train a network on Monte Carlo-simulated events and show that, by applying on-the-fly data augmentation, the network can be made robust against differences between simulation and data. The use of CNNs offer significant improvement in signal efficiency/background rejection when compared to previous non-CNN-based analyses., Comment: 19 pages, 10 figures; version matches published JHEP version
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- 2020
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22. Dependence of polytetrafluoroethylene reflectance on thickness at visible and ultraviolet wavelengths in air
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Ghosh, S., Haefner, J., Martín-Albo, J., Guenette, R., Li, X., Villalpando, A. A. Loya, Burch, C., Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Díaz, G., Díaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Goldschmidt, A., Gómez-Cadenas, J. J., González-Díaz, D., Gutiérrez, R. M., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martínez, A., Martínez-Vara, M., Martínez-Lema, G., McDonald, A. D., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A., Renner, J., Repond, J., Riordan, S., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sorel, M., Stiegler, T., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., Woodruff, K., and Yahlali, N.
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Physics - Instrumentation and Detectors - Abstract
Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. However, the reflectance of PTFE is a function of its thickness. In this work, we investigate this dependence in air for light of wavelengths 260 nm and 450 nm using two complementary methods. We find that PTFE reflectance for thicknesses from 5 mm to 10 mm ranges from 92.5% to 94.5% at 450 nm, and from 90.0% to 92.0% at 260 nm. We also see that the reflectance of PTFE of a given thickness can vary by as much as 2.7% within the same piece of material. Finally, we show that placing a specular reflector behind the PTFE can recover the loss of reflectance in the visible without introducing a specular component in the reflectance., Comment: 17 pages, 10 figures
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- 2020
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23. Sensitivity of the NEXT experiment to Xe-124 double electron capture
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Martínez-Lema, G., Martínez-Vara, M., Sorel, M., Adams, C., Alvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Díaz, G., Díaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Generowicz, J., Ghosh, S., Goldschmidt, A., Gómez-Cadenas, J. J., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ifergan, Y., Johnston, S., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., McDonald, A. D., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A. B., Renner, J., Repond, J., Riordan, S., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sofka, C., Stiegler, T., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., Woodruff, K., and Yahlali, N.
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High Energy Physics - Experiment ,Nuclear Experiment ,Physics - Instrumentation and Detectors - Abstract
Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite different, potentially providing a new channel to measure the hypothesized neutrinoless mode of these decays. The Standard-Model-allowed two-neutrino double electron capture ($2\nu ECEC$) has been predicted for a number of isotopes, but only observed in $^{78}$Kr, $^{130}$Ba and, recently, $^{124}$Xe. The sensitivity to this decay establishes a benchmark for the ultimate experimental goal, namely the potential to discover also the lepton-number-violating neutrinoless version of this process, $0\nu ECEC$. Here we report on the current sensitivity of the NEXT-White detector to $^{124}$Xe $2\nu ECEC$ and on the extrapolation to NEXT-100. Using simulated data for the $2\nu ECEC$ signal and real data from NEXT-White operated with $^{124}$Xe-depleted gas as background, we define an optimal event selection that maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100 operated with xenon gas isotopically enriched with 1 kg of $^{124}$Xe and for a 5-year run, a sensitivity to the $2\nu ECEC$ half-life of $6 \times 10^{22}$ y (at 90% confidence level) or better can be reached., Comment: 23 pages, 13 figures
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- 2020
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24. Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches
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NEXT Collaboration, Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Denisenko, A. A., Díaz, G., Díaz, J., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., González-Díaz, D., Gosh, S., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ho, J., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Vara, M., Martínez-Lema, G., McDonald, A. D., Meziani, Z. E., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Newhouse, C., Novella, P., Nygren, D. R., Oblak, E., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sorel, M., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Vuong, T. T., Webb, R., Weiss-Babai, R., White, J. T., Woodruff, K., and Yahlali, N.
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Physics - Instrumentation and Detectors ,Nuclear Experiment - Abstract
The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta decay of Xe-136 using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of neutrinoless double-beta decay decay better than 1E27 years, improving the current limits by at least one order of magnitude. This prediction is based on a well-understood background model dominated by radiogenic sources. The detector concept presented here represents a first step on a compelling path towards sensitivity to the parameter space defined by the inverted ordering of neutrino masses, and beyond., Comment: 22 pages, 11 figures
- Published
- 2020
25. Mitigation of Backgrounds from Cosmogenic $^{137}$Xe in Xenon Gas Experiments using $^{3}$He Neutron Capture
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Rogers, L., Jones, B. J. P., Laing, A., Pingulkar, S., Woodruff, K., Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Díaz, G., Díaz, J., Diesburg, M., Dingler, R., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Generowicz, J., Ghosh, S., Goldschmidt, A., Gómez-Cadenas, J. J., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ifergan, Y., Johnston, S., Kekic, M., Labarga, L., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., McDonald, A. D., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A. B., Renner, J., Repond, J., Riordan, S., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sofka, C., Sorel, M., Stiegler, T., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., and Yahlali, N.
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Physics - Instrumentation and Detectors ,High Energy Physics - Experiment - Abstract
\Xe{136} is used as the target medium for many experiments searching for \bbnonu. Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutrons causing activation of detector materials. A potential background that is difficult to veto using muon tagging comes in the form of \Xe{137} created by the capture of neutrons on \Xe{136}. This isotope decays via beta decay with a half-life of 3.8 minutes and a \Qb\ of $\sim$4.16 MeV. This work proposes and explores the concept of adding a small percentage of \He{3} to xenon as a means to capture thermal neutrons and reduce the number of activations in the detector volume. When using this technique we find the contamination from \Xe{137} activation can be reduced to negligible levels in tonne and multi-tonne scale high pressure gas xenon neutrinoless double beta decay experiments running at any depth in an underground laboratory.
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- 2020
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26. Longer ensilage time improve rumen fermentation of high moisture – High-tannin sorghum grain
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Carmen García y Santos, Lina Bettucci, Alejandro Britos, and Cecilia Cajarville
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Sorghum grains silages ,Condensed tannins ,In vitro ruminal fermentation parameters ,Moisture content ,Ensilage time ,Agriculture (General) ,S1-972 ,Nutrition. Foods and food supply ,TX341-641 - Abstract
The high moisture sorghum grain silage is an important source of feed for livestock in Uruguay and some regions of the world. That is why this study aimed to evaluate the effect of ensilage time, moisture content, and variety on the in vitro fermentation ruminal parameters of moist sorghum grain stored in experimental silos. This study was conducted to analyze gas production in vitro of two sorghum grains varieties, with high and low-tannin content, ensiled with15–25%, 26–32%, and 33–42% moisture content 30, 90, and 180 d of ensilage in experimental silos. Total gas production was higher in low-tannin grains than in those with high-tannin, regardless of the ensilage time or the moisture content. Differences in the gas production rate were also observed in the interactions between tannin and moisture content, ensilage time, and moisture content as between tannin content and moisture contents for the lag time. Moreover, medium moisture content promoted the fermentability in high-tannin grains and high moisture in low-tannin grains. The fermentability of both high and low-tannin grains was enhanced with increasing ensilage time.
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- 2023
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27. Sensitivity of a tonne-scale NEXT detector for neutrinoless double-beta decay searches
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Adams, C, Álvarez, V, Arazi, L, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Denisenko, AA, Díaz, G, Díaz, J, Escada, J, Esteve, R, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, F, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Gosh, S, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Hernando Morata, JA, Herrero, P, Herrero, V, Ho, J, Ifergan, Y, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Vara, M, Martínez-Lema, G, McDonald, AD, Meziani, ZE, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Newhouse, C, Novella, P, Nygren, DR, Oblak, E, Palmeiro, B, Para, A, Pérez, J, Querol, M, Redwine, A, Renner, J, Ripoll, L, Rivilla, I, Rodríguez García, Y, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sorel, M, Stanford, C, Teixeira, JMR, Thapa, P, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Vuong, TT, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, and Yahlali, N
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Mathematical Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics ,Nuclear & Particles Physics - Abstract
The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta (0νββ) decay of 136Xe using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of 0νββ decay better than 1027 years, improving the current limits by at least one order of magnitude. This prediction is based on a well-understood background model dominated by radiogenic sources. The detector concept presented here represents a first step on a compelling path towards sensitivity to the parameter space defined by the inverted ordering of neutrino masses, and beyond. [Figure not available: see fulltext.]
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- 2021
28. Boosting background suppression in the NEXT experiment through Richardson-Lucy deconvolution
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Simón, A, Ifergan, Y, Redwine, AB, Weiss-Babai, R, Arazi, L, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Cossío, FP, Denisenko, AA, Díaz, G, Díaz, J, Escada, J, Esteve, R, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, F, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Gosh, S, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Hernando Morata, JA, Herrero, P, Herrero, V, Ho, J, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Vara, M, Martínez-Lema, G, McDonald, AD, Meziani, Z-E, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Newhouse, C, Novella, P, Nygren, DR, Oblak, E, Odriozola-Gimeno, M, Palmeiro, B, Para, A, Pérez, J, Querol, M, Renner, J, Ripoll, L, Rivilla, I, Rodríguez García, Y, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Sorel, M, Stanford, C, Teixeira, JMR, Thapa, P, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Vuong, TT, and Webb, R
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Affordable and Clean Energy ,Mathematical Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics ,Nuclear & Particles Physics - Abstract
Next-generation neutrinoless double beta decay experiments aim for half-life sensitivities of ∼ 1027 yr, requiring suppressing backgrounds to < 1 count/tonne/yr. For this, any extra background rejection handle, beyond excellent energy resolution and the use of extremely radiopure materials, is of utmost importance. The NEXT experiment exploits differences in the spatial ionization patterns of double beta decay and single-electron events to discriminate signal from background. While the former display two Bragg peak dense ionization regions at the opposite ends of the track, the latter typically have only one such feature. Thus, comparing the energies at the track extremes provides an additional rejection tool. The unique combination of the topology-based background discrimination and excellent energy resolution (1% FWHM at the Q-value of the decay) is the distinguishing feature of NEXT. Previous studies demonstrated a topological background rejection factor of ∼ 5 when reconstructing electron-positron pairs in the 208Tl 1.6 MeV double escape peak (with Compton events as background), recorded in the NEXT-White demonstrator at the Laboratorio Subterráneo de Canfranc, with 72% signal efficiency. This was recently improved through the use of a deep convolutional neural network to yield a background rejection factor of ∼ 10 with 65% signal efficiency. Here, we present a new reconstruction method, based on the Richardson-Lucy deconvolution algorithm, which allows reversing the blurring induced by electron diffusion and electroluminescence light production in the NEXT TPC. The new method yields highly refined 3D images of reconstructed events, and, as a result, significantly improves the topological background discrimination. When applied to real-data 1.6 MeV e−e+ pairs, it leads to a background rejection factor of 27 at 57% signal efficiency. [Figure not available: see fulltext.].
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- 2021
29. Longer ensilage time improve rumen fermentation of high moisture – High-tannin sorghum grain
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García y Santos, Carmen, Bettucci, Lina, Britos, Alejandro, and Cajarville, Cecilia
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- 2023
- Full Text
- View/download PDF
30. Sensitivity of the NEXT experiment to Xe-124 double electron capture
- Author
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Martínez-Lema, G, Martínez-Vara, M, Sorel, M, Adams, C, Álvarez, V, Arazi, L, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Díaz, G, Díaz, J, Diesburg, M, Escada, J, Esteve, R, Felkai, R, Fernandes, AFM, Fernandes, LMP, Ferrario, P, Ferreira, AL, Freitas, EDC, Generowicz, J, Ghosh, S, Goldschmidt, A, Gómez-Cadenas, JJ, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Hernando Morata, JA, Herrero, P, Herrero, V, Ifergan, Y, Johnston, S, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, McDonald, AD, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Novella, P, Nygren, DR, Palmeiro, B, Para, A, Pérez, J, Querol, M, Redwine, AB, Renner, J, Repond, J, Riordan, S, Ripoll, L, Rodríguez García, Y, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sofka, C, Stiegler, T, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, and Yahlali, N
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Nuclear and Plasma Physics ,Particle and High Energy Physics ,Synchrotrons and Accelerators ,Physical Sciences ,Dark Matter and Double Beta Decay ,Mathematical Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics ,Nuclear & Particles Physics ,Mathematical physics ,Nuclear and plasma physics ,Particle and high energy physics - Abstract
Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite different, potentially providing a new channel to measure the hypothesized neutrinoless mode of these decays. The Standard-Model-allowed two-neutrino double electron capture (2νEC EC) has been predicted for a number of isotopes, but only observed in 78Kr, 130Ba and, recently, 124Xe. The sensitivity to this decay establishes a benchmark for the ultimate experimental goal, namely the potential to discover also the lepton-number-violating neutrinoless version of this process, 0νEC EC. Here we report on the current sensitivity of the NEXT-White detector to 124Xe 2νEC EC and on the extrapolation to NEXT-100. Using simulated data for the 2νEC EC signal and real data from NEXT-White operated with 124Xe-depleted gas as background, we define an optimal event selection that maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100 operated with xenon gas isotopically enriched with 1 kg of 124Xe and for a 5-year run, a sensitivity to the 2νEC EC half-life of 6 × 1022 y (at 90% confidence level) or better can be reached. [Figure not available: see fulltext.]
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- 2021
31. Demonstration of background rejection using deep convolutional neural networks in the NEXT experiment
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Kekic, M, Adams, C, Woodruff, K, Renner, J, Church, E, Del Tutto, M, Hernando Morata, JA, Gómez-Cadenas, JJ, Álvarez, V, Arazi, L, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Conde, CAN, Contreras, T, Díaz, G, Díaz, J, Diesburg, M, Escada, J, Esteve, R, Felkai, R, Fernandes, AFM, Fernandes, LMP, Ferrario, P, Ferreira, AL, Freitas, EDC, Generowicz, J, Ghosh, S, Goldschmidt, A, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Herrero, P, Herrero, V, Ifergan, Y, Jones, BJP, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, Martínez-Vara, M, McDonald, AD, Meziani, Z-E, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Novella, P, Nygren, DR, Palmeiro, B, Para, A, Pérez, J, Querol, M, Redwine, AB, Ripoll, L, Rodríguez García, Y, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sofka, C, Sorel, M, Stiegler, T, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Webb, R, Weiss-Babai, R, White, JT, and Yahlali, N
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Mathematical Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics ,Nuclear & Particles Physics - Abstract
Convolutional neural networks (CNNs) are widely used state-of-the-art computer vision tools that are becoming increasingly popular in high-energy physics. In this paper, we attempt to understand the potential of CNNs for event classification in the NEXT experiment, which will search for neutrinoless double-beta decay in 136Xe. To do so, we demonstrate the usage of CNNs for the identification of electron-positron pair production events, which exhibit a topology similar to that of a neutrinoless double-beta decay event. These events were produced in the NEXT-White high-pressure xenon TPC using 2.6 MeV gamma rays from a 228Th calibration source. We train a network on Monte Carlo-simulated events and show that, by applying on-the-fly data augmentation, the network can be made robust against differences between simulation and data. The use of CNNs offers significant improvement in signal efficiency and background rejection when compared to previous non-CNN-based analyses. [Figure not available: see fulltext.]
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- 2021
32. Radio Frequency and DC High Voltage Breakdown of High Pressure Helium, Argon, and Xenon
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Woodruff, K., Baeza-Rubio, J., Huerta, D., Jones, B. J. P., McDonald, A. D., Norman, L., Nygren, D. R., Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N. K., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Denisenko, A. A., Díaz, G., Díaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss Jr., F. W., Freitas, E. D. C., Generowicz, J., Goldschmidt, A., González-Díaz, D., Gómez-Cadenas, J. J., Ghosh, S., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Johnston, S., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Palmeiro, B., Para, A., Pérez, J., Querol, M., Renner, J., Repond, J., Riordan, S., Ripoll, L., Garcia, Y. Rodriguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sofka, C., Sorel, M., Stiegler, T., Thapa, P., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., and Yahlali, N.
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Physics - Instrumentation and Detectors ,Nuclear Experiment - Abstract
Motivated by the possibility of guiding daughter ions from double beta decay events to single-ion sensors for barium tagging, the NEXT collaboration is developing a program of R&D to test radio frequency (RF) carpets for ion transport in high pressure xenon gas. This would require carpet functionality in regimes at higher pressures than have been previously reported, implying correspondingly larger electrode voltages than in existing systems. This mode of operation appears plausible for contemporary RF-carpet geometries due to the higher predicted breakdown strength of high pressure xenon relative to low pressure helium, the working medium in most existing RF carpet devices. In this paper we present the first measurements of the high voltage dielectric strength of xenon gas at high pressure and at the relevant RF frequencies for ion transport (in the 10 MHz range), as well as new DC and RF measurements of the dielectric strengths of high pressure argon and helium gases at small gap sizes. We find breakdown voltages that are compatible with stable RF carpet operation given the gas, pressure, voltage, materials and geometry of interest.
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- 2019
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33. Low-diffusion Xe-He gas mixtures for rare-event detection: Electroluminescence Yield
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Fernandes, A. F. M., Henriques, C. A. O., Mano, R. D. P., González-Díaz, D., Azevedo, C. D. R., Silva, P. A. O. C., Gómez-Cadenas, J. J., Freitas, E. D. C., Fernandes, L. M. P., Monteiro, C. M. B., Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carríon, J. V., Cebrían, S., Church, E., Conde, C. A. N., Contreras, T., Díaz, J., Díaz, G., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Ferrario, P., Ferreira, A. L., Generowicz, J., Ghosh, S., Goldschmidt, A., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ifergan, Y., Johnston, S., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Martín-Albo, J., Martínez, A., Martínez-Lema, G., McDonald, A. D., Monrabal, F., Mora, F. J., Vidal, J. Muñoz, Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Pérez, J., Psihas, F., Querol, M., Renner, J., Repond, J., Riordan, S., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sofka, C., Sorel, M., Stiegler, T., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., Woodruff, K., and Yahlali, N.
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Physics - Instrumentation and Detectors ,Physics - Applied Physics - Abstract
High pressure xenon Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification are being proposed for rare event detection such as directional dark matter, double electron capture and double beta decay detection. The discrimination of the rare event through the topological signature of primary ionisation trails is a major asset for this type of TPC when compared to single liquid or double-phase TPCs, limited mainly by the high electron diffusion in pure xenon. Helium admixtures with xenon can be an attractive solution to reduce the electron diffusion significantly, improving the discrimination efficiency of these optical TPCs. We have measured the electroluminescence (EL) yield of Xe-He mixtures, in the range of 0 to 30% He and demonstrated the small impact on the EL yield of the addition of helium to pure xenon. For a typical reduced electric field of 2.5 kV/cm/bar in the scintillation region, the EL yield is lowered by ~ 2%, 3%, 6% and 10% for 10%, 15%, 20% and 30% of helium concentration, respectively. This decrease is less than what has been obtained from the most recent simulation framework in the literature. The impact of the addition of helium on EL statistical fluctuations is negligible, within the experimental uncertainties. The present results are an important benchmark for the simulation tools to be applied to future optical TPCs based on Xe-He mixtures.
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- 2019
34. Radiogenic backgrounds in the NEXT double beta decay experiment
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NEXT Collaboration, Novella, P., Palmeiro, B., Sorel, M., Usón, A., Ferrario, P., Gómez-Cadenas, J. J., Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., López, G. Díaz, Díaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferreira, A. L., Freitas, E. D. C., Generowicz, J., Ghosh, S., Goldschmidt, A., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ifergan, Y., Johnston, S., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., McDonald, A. D., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Nygren, D. R., Para, A., Pérez, J., Psihas, F., Querol, M., Renner, J., Repond, J., Riordan, S., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sofka, C., Stiegler, T., Toledo, J. F., Torrent, J., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., Woodruff, K., and Yahlali, N.
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Physics - Instrumentation and Detectors ,High Energy Physics - Experiment - Abstract
Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity-induced backgrounds are measured with the NEXT-White detector. Data from 37.9 days of low-background operations at the Laboratorio Subterr\'aneo de Canfranc with xenon depleted in $^{136}$Xe are analyzed to derive a total background rate of (0.84$\pm$0.02) mHz above 1000 keV. The comparison of data samples with and without the use of the radon abatement system demonstrates that the contribution of airborne-Rn is negligible. A radiogenic background model is built upon the extensive radiopurity screening campaign conducted by the NEXT Collaboration. A spectral fit to this model yields the specific contributions of $^{60}$Co, $^{40}$K, $^{214}$Bi and $^{208}$Tl to the total background rate, as well as their location in the detector volumes. The results are used to evaluate the impact of the radiogenic backgrounds in the double beta decay analyses, after the application of topological cuts that reduce the total rate to (0.25$\pm$0.01) mHz. Based on the best-fit background model, the NEXT-White median sensitivity to the two-neutrino double beta decay is found to be 3.5$\sigma$ after 1 year of data taking. The background measurement in a Q$_{\beta\beta}\pm$100 keV energy window validates the best-fit background model also for the neutrinoless double beta decay search with NEXT-100. Only one event is found, while the model expectation is (0.75$\pm$0.12) events.
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- 2019
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35. Energy calibration of the NEXT-White detector with 1% resolution near Q$_{\beta\beta}$ of $^{136}$Xe
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Renner, J., López, G. Díaz, Ferrario, P., Morata, J. A. Hernando, Kekic, M., Martínez-Lema, G., Monrabal, F., Gómez-Cadenas, J. J., Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Díaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferreira, A. L., Freitas, E. D. C., Generowicz, J., Ghosh, S., Goldschmidt, A., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Herrero, P., Herrero, V., Ifergan, Y., Johnston, S., Jones, B. J. P., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., McDonald, A. D., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Pérez, J., Psihas, F., Querol, M., Repond, J., Riordan, S., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sofka, C., Sorel, M., Stiegler, T., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., Woodruff, K., and Yahlali, N.
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Physics - Instrumentation and Detectors - Abstract
Excellent energy resolution is one of the primary advantages of electroluminescent high pressure xenon TPCs, and searches for rare physics events such as neutrinoless double-beta decay ($\beta\beta0\nu$) require precise energy measurements. Using the NEXT-White detector, developed by the NEXT (Neutrino Experiment with a Xenon TPC) collaboration, we show for the first time that an energy resolution of 1% FWHM can be achieved at 2.6 MeV, establishing the present technology as the one with the best energy resolution of all xenon detectors for $\beta\beta0\nu$ searches., Comment: 13 pages, 7 figures; accepted to JHEP
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- 2019
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36. Demonstration of the event identification capabilities of the NEXT-White detector
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NEXT Collaboration, Ferrario, P., Benlloch-Rodríguez, J. M., López, G. Díaz, Morata, J. A. Hernando, Kekic, M., Renner, J., Usón, A., Gómez-Cadenas, J. J., Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Díaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferreira, A. L., Freitas, E. D. C., Generowicz, J., Ghosh, S., Goldschmidt, A., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Herrero, P., Herrero, V., Ifergan, Y., Johnston, S., Jones, B. J. P., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., McDonald, A. D., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Pérez, J., Psihas, F., Querol, M., Repond, J., Riordan, S., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sofka, C., Sorel, M., Stiegler, T., Toledo, J. F., Torrent, J., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., Woodruff, K., and Yahlali, N.
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Physics - Instrumentation and Detectors ,High Energy Physics - Experiment - Abstract
In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity of the experiment. In this paper we present the first measurement of the efficiency of a cut based on the different event signatures of double and single electron tracks, using the data of the NEXT-White detector, the first detector of the NEXT experiment operating underground. Using a \TO\ calibration source to produce signal-like and background-like events with energies near 1.6 MeV, a signal efficiency of $71.6 \pm 1.5_{\textrm{ stat}} \pm 0.3_{\textrm{ sys}} \%$ for a background acceptance of $20.6 \pm 0.4_{\textrm{ stat}} \pm 0.3_{\textrm{ sys}} \%$ is found, in good agreement with Monte Carlo simulations. An extrapolation to the energy region of the neutrinoless double beta decay by means of Monte Carlo simulations is also carried out, and the results obtained show an improvement in background rejection over those obtained at lower energies., Comment: Accepted by JHEP
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- 2019
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37. Centered and non-centered variance inflation factor
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Gómez, Román Salmerón and Pérez, Catalina García García y José García
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Economics - Econometrics ,Statistics - Methodology ,62J05 - Abstract
This paper analyzes the diagnostic of near multicollinearity in a multiple linear regression from auxiliary centered regressions (with intercept) and non-centered (without intercept). From these auxiliary regression, the centered and non-centered Variance Inflation Factors are calculated, respectively. It is also presented an expression that relate both of them., Comment: 7 pages
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- 2019
38. Electron Drift and Longitudinal Diffusion in High Pressure Xenon-Helium Gas Mixtures
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McDonald, A. D., Woodruff, K., Atoum, B. Al, González-Díaz, D., Jones, B. J. P., Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Díaz, G., Díaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, A. F. M., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Johnston, S., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Monrabal, F., Monteiro, C. M. B., Mora, F. J., MuñozVidal, J., Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Pérez, J., Querol, M., Renner, J., Repond, J., Riordan, S., Ripoll, L., Garcia, Y. Rodriguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sofka, C., Sorel, M., Stiegler, T., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, White, J. T., and Yahlali, N.
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Physics - Instrumentation and Detectors ,Nuclear Experiment - Abstract
We report new measurements of the drift velocity and longitudinal diffusion coefficients of electrons in pure xenon gas and in xenon-helium gas mixtures at 1-9 bar and electric field strengths of 50-300 V/cm. In pure xenon we find excellent agreement with world data at all $E/P$, for both drift velocity and diffusion coefficients. However, a larger value of the longitudinal diffusion coefficient than theoretical predictions is found at low $E/P$ in pure xenon, below the range of reduced fields usually probed by TPC experiments. A similar effect is observed in xenon-helium gas mixtures at somewhat larger $E/P$. Drift velocities in xenon-helium mixtures are found to be theoretically well predicted. Although longitudinal diffusion in xenon-helium mixtures is found to be larger than anticipated, extrapolation based on the measured longitudinal diffusion coefficients suggest that the use of helium additives to reduce transverse diffusion in xenon gas remains a promising prospect.
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- 2019
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39. Low-diffusion Xe-He gas mixtures for rare-event detection: electroluminescence yield
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Fernandes, AFM, Henriques, CAO, Mano, RDP, González-Díaz, D, Azevedo, CDR, Silva, PAOC, Gómez-Cadenas, JJ, Freitas, EDC, Fernandes, LMP, Monteiro, CMB, Adams, C, Álvarez, V, Arazi, L, Arnquist, IJ, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Díaz, G, Díaz, J, Diesburg, M, Escada, J, Esteve, R, Felkai, R, Ferrario, P, Ferreira, AL, Generowicz, J, Ghosh, S, Goldschmidt, A, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Hernando Morata, JA, Herrero, P, Herrero, V, Ifergan, Y, Johnston, S, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Martín-Albo, J, Martínez, A, Martínez-Lema, G, McDonald, AD, Monrabal, F, Mora, FJ, Muñoz Vidal, J, Novella, P, Nygren, DR, Palmeiro, B, Para, A, Pérez, J, Psihas, F, Querol, M, Renner, J, Repond, J, Riordan, S, Ripoll, L, Rodríguez García, Y, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sofka, C, Sorel, M, Stiegler, T, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, and Yahlali, N
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Prevention ,Mathematical Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics ,Nuclear & Particles Physics - Abstract
High pressure xenon Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification are being proposed for rare event detection such as directional dark matter, double electron capture and double beta decay detection. The discrimination of the rare event through the topological signature of primary ionisation trails is a major asset for this type of TPC when compared to single liquid or double-phase TPCs, limited mainly by the high electron diffusion in pure xenon. Helium admixtures with xenon can be an attractive solution to reduce the electron diffu- sion significantly, improving the discrimination efficiency of these optical TPCs. We have measured the electroluminescence (EL) yield of Xe–He mixtures, in the range of 0 to 30% He and demonstrated the small impact on the EL yield of the addition of helium to pure xenon. For a typical reduced electric field of 2.5 kV/cm/bar in the EL region, the EL yield is lowered by ∼ 2%, 3%, 6% and 10% for 10%, 15%, 20% and 30% of helium concentration, respectively. This decrease is less than what has been obtained from the most recent simulation framework in the literature. The impact of the addition of helium on EL statistical fluctuations is negligible, within the experimental uncertainties. The present results are an important benchmark for the simulation tools to be applied to future optical TPCs based on Xe-He mixtures. [Figure not available: see fulltext.].
- Published
- 2020
40. Passive film formation and corrosion resistance of laser-powder bed fusion fabricated NiTi shape memory alloys
- Author
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Liu, Ming, Zhu, Jia-Ning, Popovich, V.A., Borisov, E., Mol, J.M.C., and Gonzalez-Garcia, Y.
- Published
- 2023
- Full Text
- View/download PDF
41. Basal Extended Mentoplasty
- Author
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García y Sánchez, José Manuel, Gómez Rodríguez, C. L., Gradias Caballero, D. A., and Valdés Martínez, D. A.
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- 2022
- Full Text
- View/download PDF
42. Crop rotational diversity can mitigate climate-induced grain yield losses
- Author
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Swedish Research Council for Sustainable Development, Scottish Government, Swedish University of Agricultural Sciences, Ministerio de Ciencia e Innovación (España), Ministerio de Economía y Competitividad (España), Biotechnology and Biological Sciences Research Council (UK), Costa, Alessio [0000-0002-8647-4738], Bommarco, Riccardo [0000-0001-8888-0476], Smith, Monique E. [0000-0001-5913-3770], Bowles, Timothy [0000-0002-4840-3787], Gaudin, Amélie C.M. [0000-0003-4007-9991], Watson, Christine A. [0000-0002-3758-9483], Alarcòn, Remedios [0000-0003-0078-8363], Berti, Antonio [0000-0002-6377-2820], Blecharczyk, Andrzej [0000-0002-8688-3136], Calderon, Francisco J. [0000-0002-1122-1285], Culman, Steve [0000-0003-3985-257X], Deen, William [0000-0001-5966-6462], Drury, Craig F. [0000-0003-0986-0755], García y García, Axel [0000-0002-7263-530X], García-Díaz, Andrés [0000-0003-4270-0972], Hernández Plaza, María Eva [0000-0002-2378-2602], Jonczyk, Krzysztof [0000-0002-5262-8858], Jäck, Ortrud [0000-0002-9885-0008], Navarrete Martínez, Luis [0009-0007-0900-8745], Montemurro, Francesco [0000-0003-3209-0189], Morari, Francesco [0000-0001-9081-868X], Onofri, Andrea [0000-0002-6603-329X], Osborne, Shannon L. [0000-0003-3458-3251], Tenorio, J. L. [0000-0001-7596-6676], Sandström, Boël [0000-0003-1316-8569], Santín Montanyá, Inés [0000-0003-1978-6560], Sawinska, Zuzanna [0009-0008-3170-0145], Schmer, Marty R. [0000-0002-3721-6177], Stalenga, Jaroslaw [0000-0002-3486-0995], Strock, Jeffrey [0000-0001-5357-0638], Tei, Francesco [0000-0003-0857-9662], Topp, Cairistiona F.E. [0000-0002-7064-638X], Ventrella, Domenico [0000-0001-8761-028X], Walker, Robin L. [0000-0002-8008-4413], Vico, Giulia [0000-0002-7849-2653], Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Costa, Alessio, Bommarco, Riccardo, Smith, Monique E., Bowles, Timothy, Gaudin, Amélie C.M., Watson, Christine A., Alarcòn, Remedios, Berti, Antonio, Blecharczyk, Andrzej, Calderon, Francisco J., Culman, Steve, Deen, William, Drury, Craig F., García y García, Axel, García-Díaz, Andrés, Hernández Plaza, María Eva, Jonczyk, Krzysztof, Jäck, Ortrud, Navarrete Martínez, Luis, Montemurro, Francesco, Morari, Francesco, Onofri, Andrea, Osborne, Shannon L., Tenorio, J. L., Sandström, Boël, Santín Montanyá, Inés, Sawinska, Zuzanna, Schmer, Marty R., Stalenga, Jaroslaw, Strock, Jeffrey, Tei, Francesco, Topp, Cairistiona F.E., Ventrella, Domenico, Walker, Robin L., Vico, Giulia, Swedish Research Council for Sustainable Development, Scottish Government, Swedish University of Agricultural Sciences, Ministerio de Ciencia e Innovación (España), Ministerio de Economía y Competitividad (España), Biotechnology and Biological Sciences Research Council (UK), Costa, Alessio [0000-0002-8647-4738], Bommarco, Riccardo [0000-0001-8888-0476], Smith, Monique E. [0000-0001-5913-3770], Bowles, Timothy [0000-0002-4840-3787], Gaudin, Amélie C.M. [0000-0003-4007-9991], Watson, Christine A. [0000-0002-3758-9483], Alarcòn, Remedios [0000-0003-0078-8363], Berti, Antonio [0000-0002-6377-2820], Blecharczyk, Andrzej [0000-0002-8688-3136], Calderon, Francisco J. [0000-0002-1122-1285], Culman, Steve [0000-0003-3985-257X], Deen, William [0000-0001-5966-6462], Drury, Craig F. [0000-0003-0986-0755], García y García, Axel [0000-0002-7263-530X], García-Díaz, Andrés [0000-0003-4270-0972], Hernández Plaza, María Eva [0000-0002-2378-2602], Jonczyk, Krzysztof [0000-0002-5262-8858], Jäck, Ortrud [0000-0002-9885-0008], Navarrete Martínez, Luis [0009-0007-0900-8745], Montemurro, Francesco [0000-0003-3209-0189], Morari, Francesco [0000-0001-9081-868X], Onofri, Andrea [0000-0002-6603-329X], Osborne, Shannon L. [0000-0003-3458-3251], Tenorio, J. L. [0000-0001-7596-6676], Sandström, Boël [0000-0003-1316-8569], Santín Montanyá, Inés [0000-0003-1978-6560], Sawinska, Zuzanna [0009-0008-3170-0145], Schmer, Marty R. [0000-0002-3721-6177], Stalenga, Jaroslaw [0000-0002-3486-0995], Strock, Jeffrey [0000-0001-5357-0638], Tei, Francesco [0000-0003-0857-9662], Topp, Cairistiona F.E. [0000-0002-7064-638X], Ventrella, Domenico [0000-0001-8761-028X], Walker, Robin L. [0000-0002-8008-4413], Vico, Giulia [0000-0002-7849-2653], Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Costa, Alessio, Bommarco, Riccardo, Smith, Monique E., Bowles, Timothy, Gaudin, Amélie C.M., Watson, Christine A., Alarcòn, Remedios, Berti, Antonio, Blecharczyk, Andrzej, Calderon, Francisco J., Culman, Steve, Deen, William, Drury, Craig F., García y García, Axel, García-Díaz, Andrés, Hernández Plaza, María Eva, Jonczyk, Krzysztof, Jäck, Ortrud, Navarrete Martínez, Luis, Montemurro, Francesco, Morari, Francesco, Onofri, Andrea, Osborne, Shannon L., Tenorio, J. L., Sandström, Boël, Santín Montanyá, Inés, Sawinska, Zuzanna, Schmer, Marty R., Stalenga, Jaroslaw, Strock, Jeffrey, Tei, Francesco, Topp, Cairistiona F.E., Ventrella, Domenico, Walker, Robin L., and Vico, Giulia
- Abstract
Diversified crop rotations have been suggested to reduce grain yield losses from the adverse climatic conditions increasingly common under climate change. Nevertheless, the potential for climate change adaptation of different crop rotational diversity (CRD) remains undetermined. We quantified how climatic conditions affect small grain and maize yields under different CRDs in 32 long-term (10-63 years) field experiments across Europe and North America. Species-diverse and functionally rich rotations more than compensated yield losses from anomalous warm conditions, long and warm dry spells, as well as from anomalous wet (for small grains) or dry (for maize) conditions. Adding a single functional group or crop species to monocultures counteracted yield losses from substantial changes in climatic conditions. The benefits of a further increase in CRD are comparable with those of improved climatic conditions. For instance, the maize yield benefits of adding three crop species to monocultures under detrimental climatic conditions exceeded the average yield of monocultures by up to 553 kg/ha under non-detrimental climatic conditions. Increased crop functional richness improved yields under high temperature, irrespective of precipitation. Conversely, yield benefits peaked at between two and four crop species in the rotation, depending on climatic conditions and crop, and declined at higher species diversity. Thus, crop species diversity could be adjusted to maximize yield benefits. Diversifying rotations with functionally distinct crops is an adaptation of cropping systems to global warming and changes in precipitation.
- Published
- 2024
43. Method for Improved Image Reconstruction in Computed Tomography and Positron Emission Tomography, Based on Compressive Sensing with Prefiltering in the Frequency Domain
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Garcia, Y., Franco, C., Miosso, C. J., Magjarevic, Ratko, Series Editor, Ładyżyński, Piotr, Associate Editor, Ibrahim, Fatimah, Associate Editor, Lackovic, Igor, Associate Editor, Rock, Emilio Sacristan, Associate Editor, Bastos-Filho, Teodiano Freire, editor, de Oliveira Caldeira, Eliete Maria, editor, and Frizera-Neto, Anselmo, editor
- Published
- 2022
- Full Text
- View/download PDF
44. The effect of pH on the corrosion protection of aluminum alloys in lithium-carbonate-containing NaCl solutions
- Author
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Michailidou, E., Visser, P., Mol, J.M.C., Kosari, A., Terryn, H., Baert, K., and Gonzalez-Garcia, Y.
- Published
- 2023
- Full Text
- View/download PDF
45. Unveiled electric profiles within hydrogen bonds suggest DNA base pairs with similar bond strengths
- Author
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Ruiz-Blanco, Y. B., Almeida, Y., Sotomayor-Torres, C. M., and García, Y.
- Subjects
Quantitative Biology - Biomolecules ,Physics - Biological Physics - Abstract
Electrical forces are the background of all the interactions occurring in biochemical systems. From here and by using a combination of ab-initio and ad-hoc models, we introduce the first description of electric field profiles with intrabond resolution to support a characterization of single bond forces attending to its electrical origin. This fundamental issue has eluded a physical description so far. Our method is applied to describe hydrogen bonds (HB) in DNA base pairs. Numerical results reveal that base pairs in DNA could be equivalent considering HB strength contributions, which challenges previous interpretations of thermodynamic properties of DNA based on the assumption that Adenine/Thymine pairs are weaker than Guanine/Cytosine pairs due to the sole difference in the number of HB. Thus, our methodology provides solid foundations to support the development of extended models intended to go deeper into the molecular mechanisms of DNA functioning., Comment: Full version is available on: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0185638
- Published
- 2018
- Full Text
- View/download PDF
46. Demonstration of the event identification capabilities of the NEXT-White detector
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Ferrario, P, Benlloch-Rodríguez, JM, Díaz López, G, Hernando Morata, JA, Kekic, M, Renner, J, Usón, A, Gómez-Cadenas, JJ, Adams, C, Álvarez, V, Arazi, L, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrían, S, Church, E, Conde, CAN, Contreras, T, Díaz, J, Diesburg, M, Escada, J, Esteve, R, Felkai, R, Fernandes, AFM, Fernandes, LMP, Ferreira, AL, Freitas, EDC, Generowicz, J, Ghosh, S, Goldschmidt, A, González-Díaz, D, Guenette, R, Gutíerrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Herrero, P, Herrero, V, Ifergan, Y, Johnston, S, Jones, BJP, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, McDonald, AD, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Novella, P, Nygren, DR, Palmeiro, B, Para, A, Pérez, J, Psihas, F, Querol, M, Repond, J, Riordan, S, Ripoll, L, Rodríguez García, Y, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sofka, C, Sorel, M, Stiegler, T, Toledo, JF, Torrent, J, Veloso, JFCA, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, and Yahlali, N
- Subjects
Mathematical Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics ,Nuclear & Particles Physics - Abstract
In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity of the experiment. In this paper we present the first measurement of the efficiency of a cut based on the different event signatures of double and single electron tracks, using the data of the NEXT-White detector, the first detector of the NEXT experiment operating underground. Using a 228Th calibration source to produce signal-like and background-like events with energies near 1.6 MeV, a signal efficiency of 71.6 ± 1.5 stat± 0.3 sys% for a background acceptance of 20.6 ± 0.4 stat± 0.3 sys% is found, in good agreement with Monte Carlo simulations. An extrapolation to the energy region of the neutrinoless double beta decay by means of Monte Carlo simulations is also carried out, and the results obtained show an improvement in background rejection over those obtained at lower energies. [Figure not available: see fulltext.]
- Published
- 2019
47. Radiogenic backgrounds in the NEXT double beta decay experiment
- Author
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Novella, P, Palmeiro, B, Sorel, M, Usón, A, Ferrario, P, Gómez-Cadenas, JJ, Adams, C, Álvarez, V, Arazi, L, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrían, S, Church, E, Conde, CAN, Contreras, T, Díaz, G, Díaz, J, Diesburg, M, Escada, J, Esteve, R, Felkai, R, Fernandes, AFM, Fernandes, LMP, Ferreira, AL, Freitas, EDC, Generowicz, J, Ghosh, S, Goldschmidt, A, Gonźalez-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Hernando Morata, JA, Herrero, P, Herrero, V, Ifergan, Y, Johnston, S, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, McDonald, AD, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Nygren, DR, Para, A, Pérez, J, Psihas, F, Querol, M, Renner, J, Repond, J, Riordan, S, Ripoll, L, Rodríguez García, Y, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sofka, C, Stiegler, T, Toledo, JF, Torrent, J, Veloso, JFCA, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, and Yahlali, N
- Subjects
Nuclear and Plasma Physics ,Particle and High Energy Physics ,Physical Sciences ,Dark Matter and Double Beta Decay ,Mathematical Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics ,Nuclear & Particles Physics ,Mathematical physics ,Nuclear and plasma physics ,Particle and high energy physics - Abstract
Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity- induced backgrounds are measured with the NEXT-White detector. Data from 37.9 days of low-background operations at the Laboratorio Subterráneo de Canfranc with xenon depleted in 136Xe are analyzed to derive a total background rate of (0.84±0.02) mHz above 1000 keV. The comparison of data samples with and without the use of the radon abatement system demonstrates that the contribution of airborne-Rn is negligible. A radiogenic background model is built upon the extensive radiopurity screening campaign conducted by the NEXT collaboration. A spectral fit to this model yields the specific contributions of 60Co, 40K, 214Bi and 208Tl to the total background rate, as well as their location in the detector volumes. The results are used to evaluate the impact of the radiogenic backgrounds in the double beta decay analyses, after the application of topological cuts that reduce the total rate to (0.25±0.01) mHz. Based on the best-fit background model, the NEXT-White median sensitivity to the two-neutrino double beta decay is found to be 3.5σ after 1 year of data taking. The background measurement in a Qββ±100 keV energy window validates the best-fit background model also for the neutrinoless double beta decay search with NEXT-100. Only one event is found, while the model expectation is (0.75±0.12) events. [Figure not available: see fulltext.].
- Published
- 2019
48. Energy calibration of the NEXT-White detector with 1% resolution near Qββ of 136Xe
- Author
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Renner, J, Díaz López, G, Ferrario, P, Hernando Morata, JA, Kekic, M, Martínez-Lema, G, Monrabal, F, Gómez-Cadenas, JJ, Adams, C, Álvarez, V, Arazi, L, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Díaz, J, Diesburg, M, Escada, J, Esteve, R, Felkai, R, Fernandes, AFM, Fernandes, LMP, Ferreira, AL, Freitas, EDC, Generowicz, J, Ghosh, S, Goldschmidt, A, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Herrero, P, Herrero, V, Ifergan, Y, Johnston, S, Jones, BJP, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, McDonald, AD, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Novella, P, Nygren, DR, Palmeiro, B, Para, A, Pérez, J, Psihas, F, Querol, M, Repond, J, Riordan, S, Ripoll, L, Rodríguez García, Y, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sofka, C, Sorel, M, Stiegler, T, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, and Yahlali, N
- Subjects
Nuclear and Plasma Physics ,Particle and High Energy Physics ,Synchrotrons and Accelerators ,Physical Sciences ,Bioengineering ,Affordable and Clean Energy ,Dark Matter and Double Beta Decay ,Mathematical Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics ,Nuclear & Particles Physics ,Mathematical physics ,Nuclear and plasma physics ,Particle and high energy physics - Abstract
Excellent energy resolution is one of the primary advantages of electroluminescent high-pressure xenon TPCs. These detectors are promising tools in searching for rare physics events, such as neutrinoless double-beta decay (ββ0ν), which require precise energy measurements. Using the NEXT-White detector, developed by the NEXT (Neutrino Experiment with a Xenon TPC) collaboration, we show for the first time that an energy resolution of 1% FWHM can be achieved at 2.6 MeV, establishing the present technology as the one with the best energy resolution of all xenon detectors for ββ0ν searches. [Figure not available: see fulltext.]
- Published
- 2019
49. Energy calibration of the NEXT-White detector with 1% resolution near Q ββ of 136Xe
- Author
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Renner, J, Díaz López, G, Ferrario, P, Hernando Morata, JA, Kekic, M, Martínez-Lema, G, Monrabal, F, Gómez-Cadenas, JJ, Adams, C, Álvarez, V, Arazi, L, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Díaz, J, Diesburg, M, Escada, J, Esteve, R, Felkai, R, Fernandes, AFM, Fernandes, LMP, Ferreira, AL, Freitas, EDC, Generowicz, J, Ghosh, S, Goldschmidt, A, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Herrero, P, Herrero, V, Ifergan, Y, Johnston, S, Jones, BJP, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, McDonald, AD, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Novella, P, Nygren, DR, Palmeiro, B, Para, A, Pérez, J, Psihas, F, Querol, M, Repond, J, Riordan, S, Ripoll, L, Rodríguez García, Y, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sofka, C, Sorel, M, Stiegler, T, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, and Yahlali, N
- Subjects
Dark Matter and Double Beta Decay ,Bioengineering ,Nuclear & Particles Physics ,Mathematical Sciences ,Physical Sciences ,Mathematical Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics - Abstract
Excellent energy resolution is one of the primary advantages of electroluminescent high-pressure xenon TPCs. These detectors are promising tools in searching for rare physics events, such as neutrinoless double-beta decay (ββ0ν), which require precise energy measurements. Using the NEXT-White detector, developed by the NEXT (Neutrino Experiment with a Xenon TPC) collaboration, we show for the first time that an energy resolution of 1% FWHM can be achieved at 2.6 MeV, establishing the present technology as the one with the best energy resolution of all xenon detectors for ββ0ν searches. [Figure not available: see fulltext.]
- Published
- 2019
50. The dynamics of ions on phased radio-frequency carpets in high pressure gases and application for barium tagging in xenon gas time projection chambers
- Author
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Jones, B.J.P., Raymond, A., Woodruff, K., Byrnes, N., Denisenko, A.A., Foss, F.W., Navarro, K., Nygren, D.R., Vuong, T.T., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A.I., Arazi, L., Arnquist, I.J., Ayet, S., Azevedo, C.D.R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J.M., Borges, F.I.G.M., Bounasser, S., Cárcel, S., Carrión, J.V., Cebrián, S., Church, E., Conde, C.A.N., Contreras, T., Cossío, F.P., Díaz, G., Díaz, J., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L.M.P., Ferrario, P., Ferreira, A.L., Freitas, E.D.C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J.J., González, R., González-Díaz, D., Guenette, R., Gutiérrez, R.M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C.A.O., Morata, J.A. Hernando, Herrero-Gómez, P., Herrero, V., Ho, J., Ifergan, Y., Kekic, M., Labarga, L., Laing, A., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Losada, M., Mano, R.D.P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Martínez-Vara, M., McDonald, A.D., Meziani, Z.E., Mistry, K., Monrabal, F., Monteiro, C.M.B., Mora, F.J., Vidal, J. Muñoz, Novella, P., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A.B., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F.P., dos Santos, J.M.F., Simón, A., Sorel, M., Stanford, C., Teixeira, J.M.R., Thapa, P., Toledo, J.F., Torrent, J., Usón, A., Veloso, J.F.C.A., Webb, R., Weiss-Babai, R., White, J.T., and Yahlali, N.
- Published
- 2022
- Full Text
- View/download PDF
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