arXiv - PHYS - Nuclear Experiment最新文献

{"title":"Strength measurement of the $E_α^{lab}$ = 830 keV resonance in $^{22}rm{Ne}(α,n)^{25}rm{Mg}$ reaction using a stilbene detector","authors":"Shahina, R. J. deBoer, J. Gorres, R. Fang, M. Febbraro, R. Kelmar, M. Matney, K. Manukyan, J. T. Nattress, E. Robles, T. J. Ruland, T. T. King, A. Sanchez, R. S. Sidhu, E. Stech, M. Wiescher","doi":"arxiv-2409.01393","DOIUrl":"https://doi.org/arxiv-2409.01393","url":null,"abstract":"The interplay between the $^{22}$Ne$(alpha,gamma)^{26}$Mg and the competing\u0000$^{22}$Ne$(alpha,n)^{25}$Mg reactions determines the efficiency of the latter\u0000as a neutron source at the temperatures of stellar helium burning. In both\u0000cases, the rates are dominated by the $alpha$-cluster resonance at 830 keV.\u0000This resonance plays a particularly important role in determining the strength\u0000of the neutron flux for both the weak and main $s$-process as well as the\u0000$n$-process. Recent experimental studies based on transfer reactions suggest\u0000that the neutron and $gamma$-ray strengths for this resonance are\u0000approximately equal. In this study, the $^{22}$Ne$(alpha,n)^{25}$Mg resonance\u0000strength has been remeasured and found to be similar to the previous direct\u0000studies. This reinforces an 830 keV resonance strength that is approximately a\u0000factor of three larger for the $^{22}$Ne$(alpha,n)^{25}$Mg reaction than for\u0000the $^{22}$Ne$(alpha,gamma)^{26}$Mg reaction.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Charm Sivers function at EicC","authors":"Senjie Zhu, Duxin Zheng, Lei Xia, Yifei Zhang","doi":"arxiv-2409.00653","DOIUrl":"https://doi.org/arxiv-2409.00653","url":null,"abstract":"The Electron-Ion Collider in China (EicC) is pivotal in enhancing our\u0000knowledge of the internal structure of nucleons and nuclei, particularly\u0000through the study of transverse momentum-dependent parton distributions (TMDs).\u0000Among the leading-twist TMDs, the Sivers function is of particular interest, as\u0000it provides crucial insights into the spin and momentum structure of hadrons\u0000and plays a significant role in describing transverse single spin asymmetries\u0000(SSAs) in high-energy scatterings. In this study, we focus on the theoretical framework and phenomenological\u0000implications of the Sivers function in the context of small-x physics, where it\u0000is intricately connected to the spin-dependent QCD odderon, demonstrating that\u0000the SSA can be expressed in terms of transverse momentum-dependent\u0000factorization within the Color Glass Condensate effective theory. Furthermore,\u0000we present simulation results using PythiaeRHIC to assess the feasibility of\u0000measuring the charm quark Sivers function at EicC. The simulation outcomes\u0000suggest that EicC, with its unique kinematic coverage, offers distinct\u0000advantages for probing the Sivers function, which would provide compelling\u0000evidence for the existence of the elusive spin-dependent odderon.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Status report on long-time decay measurements of 137Cs radioisotope","authors":"Edit Fenyvesi, Gábor Gyula Kiss, Dénes Molnár, Péter Lévai, Gergely Gábor Barnaföldi","doi":"arxiv-2409.00182","DOIUrl":"https://doi.org/arxiv-2409.00182","url":null,"abstract":"The constancy of nuclear decay rates can be investigated via long-duration\u0000precision measurements. It is still an open question whether any (annual)\u0000modulation can be observed. Long-lasting nuclear decay rate measurements have\u0000been the subject of considerable research effort. A decay rate measurement with\u0000a 137Cs source is currently being conducted 30 meters below the ground at the\u0000J'anossy Underground Research Laboratory (JURLab, Csilleb'erc, Hungary)\u0000utilizing a High-purity Germanium (HPGe) detector. The laboratory is the\u0000low-radiation-background part of the Vesztergombi High Energy Laboratory (VLAB)\u0000on the KFKI campus, Csilleb'erc, Hungary. From October 2022 to April 2024,\u0000data of 18 months' worth have been collected, providing a new opportunity to\u0000look for variations in decay rates. The experimental setup, data processing\u0000method, and the first results of this measurement are presented here.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Event-activity-dependent beauty-baryon enhancement in simulations with color junctions","authors":"Lea Virág Földvári, Zoltán Varga, Róbert Vértesi","doi":"arxiv-2408.16447","DOIUrl":"https://doi.org/arxiv-2408.16447","url":null,"abstract":"Recent results from ALICE and CMS show a low-transverse-momentum enhancement\u0000of charm baryon-to-meson production ratios over model predictions based on\u0000e$^+$e$^-$ collisions. Several mechanisms are proposed to understand this\u0000phenomenon. New measurements by the LHCb and ALICE experiments show a similar\u0000enhancement in the beauty sector. We explore this enhancement in terms of event\u0000activity using the color-reconnection beyond leading order approximation model.\u0000We propose sensitive probes relying on the event shape that will allow for the\u0000differentiation between the proposed beauty-production scenarios using freshly\u0000collected LHC Run-3 data, and we also compare these to predictions for charm.\u0000Our results will contribute to a deeper theoretical understanding of the\u0000heavy-flavor baryon enhancement and its relation to baryon enhancement in\u0000general.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tracking the baryon number with nuclear collisions","authors":"STAR Collaboration","doi":"arxiv-2408.15441","DOIUrl":"https://doi.org/arxiv-2408.15441","url":null,"abstract":"Baryon quantum number is believed to be conserved since baryogenesis in the\u0000early Universe. While fractionally charged valence quarks are understood\u0000conventionally to each carry a baryon number of 1/3, the baryon junction, a\u0000non-perturbative Y-shaped topology of neutral gluons, has also been proposed as\u0000an alternative entity tracing the baryon number. Neither scenario has been\u0000verified experimentally. The STAR Collaboration reports measurements at\u0000mid-rapidity of baryon number ($boldsymbol{B}$) over the electric charge\u0000number difference ($boldsymbol{Delta Q}$) in isobar nuclear collisions, and\u0000the net-proton yield along rapidity in photonuclear collisions. A larger\u0000$boldsymbol{B/Delta Q}$ ratio and less asymmetric net-proton yield are\u0000observed than predicted from models assigning baryon number to valence quarks.\u0000These findings, corroborated by previous measurements in Au+Au collisions,\u0000disfavor the valence quark picture.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-precision mass measurements of the ground and isomeric states in $^{124,125}$Ag","authors":"J. Ruotsalainen, D. A. Nesterenko, M. Stryjczyk, A. Kankainen, L. Al Ayoubi, O. Beliuskina, L. Canete, P. Chauveau, R. P. de Groote, P. Delahaye, T. Eronen, M. Flayol, Z. Ge, S. Geldhof, W. Gins, M. Hukkanen, A. Jaries, D. Kahl, D. Kumar, I. D. Moore, S. Nikas, H. Penttilä, D. Pitman-Weymouth, A. Raggio, S. Rinta-Antila, A. de Roubin, M. Vilen, V. Virtanen, M. Winter","doi":"arxiv-2408.14181","DOIUrl":"https://doi.org/arxiv-2408.14181","url":null,"abstract":"The masses of the ground and isomeric states in $^{124,125}$Ag have been\u0000measured using the phase-imaging ion-cyclotron-resonance technique at the\u0000JYFLTRAP double Penning trap mass spectrometer. The ground states of $^{124}$Ag\u0000and $^{125}$Ag were found to be 30(250) keV and 250(430) keV less bound but 36\u0000and 110 times more precise than in the Atomic Mass Evaluation 2020,\u0000respectively. The excitation energy of $^{124}$Ag$^{m}$, ${E_x = 188.2(25)}$\u0000keV, was determined for the first time. The new precise mass values have been\u0000utilised to study the evolution of nuclear structure via two-neutron separation\u0000energies. The impact on the astrophysical rapid neutron capture process has\u0000been investigated via neutron-capture reaction rate calculations. The precision\u0000measurements indicate a more linear trend in two-neutron separation energies\u0000and reduce the mass-related uncertainties for the neutron-capture rate of\u0000$^{124}$Ag$(n,gamma)^{125}$Ag by a factor of around 100. The new mass values\u0000also improve the mass of $^{123}$Pd, previously measured using $^{124}$Ag as a\u0000reference.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiative Decay of the $^{229m}$Th Nuclear Clock Isomer in Different Host Materials","authors":"S. V. Pineda, P. Chhetri, S. Bara, Y. Elskens, S. Casci, A. N. Alexandrova, M. Au, M. Athanasakis-Kaklamanakis, M. Bartokos, K. Beeks, C. Bernerd, A. Claessens, K. Chrysalidis, T. E. Cocolios, J. G. Correia, H. De Witte, R. Elwell, R. Ferrer, R. Heinke, E. R. Hudson, F. Ivandikov, Yu. Kudryavtsev, U. Köster, S. Kraemer, M. Laatiaoui, R. Lica, C. Merckling, I. Morawetz, H. W. T. Morgan, D. Moritz, L. M. C. Pereira, S. Raeder, S. Rothe, F. Schaden, K. Scharl, T. Schumm, S. Stegemann, J. Terhune, P. G. Thirolf, S. M. Tunhuma, P. Van Den Bergh, P. Van Duppen, A. Vantomme, U. Wahl, Z. Yue","doi":"arxiv-2408.12309","DOIUrl":"https://doi.org/arxiv-2408.12309","url":null,"abstract":"A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN\u0000of the radiative decay of the $^{229m}$Th nuclear clock isomer embedded in\u0000different host materials is reported. The ratio of the number of radiative\u0000decay photons and the number of $^{229m}$Th embedded are determined for single\u0000crystalline CaF$_2$, MgF$_2$, LiSrAlF$_6$, AlN, and amorphous SiO$_2$. For the\u0000latter two materials, no radiative decay signal was observed and an upper limit\u0000of the ratio is reported. The radiative decay wavelength was determined in\u0000LiSrAlF$_6$ and CaF$_2$, reducing its uncertainty by a factor of 2.5 relative\u0000to our previous measurement. This value is in agreement with the recently\u0000reported improved values from laser excitation.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Observation of Thermal Deuteron-Deuteron Fusion in Ion Tracks","authors":"K. Czerski, R. Dubey, A. Kowalska, G. Haridas Das, M. Kaczmarski, N. Targosz-Sleczka, M. Valat","doi":"arxiv-2409.02112","DOIUrl":"https://doi.org/arxiv-2409.02112","url":null,"abstract":"A direct observation of the deuteron-deuteron (DD) fusion reaction at thermal\u0000meV energies, although theoretically possible, is not succeeded up to now. The\u0000electron screening effect that reduces the repulsive Coulomb barrier between\u0000reacting nuclei in metallic environments by several hundreds of eV and is\u0000additionally increased by crystal lattice defects in the hosting material,\u0000leads to strongly enhanced cross sections which means that this effect might be\u0000studied in laboratories. Here we present results of the 2H(d,p)3H reaction\u0000measurements performed on a ZrD2 target down to the lowest deuteron energy in\u0000the center mass system of 675 eV, using an ultra-high vacuum accelerator\u0000system, recently upgraded to achieve high beam currents at very low energies.\u0000The experimental thick target yield, decreasing over seven orders of magnitude\u0000for lowering beam energies, could be well described by the electron screening\u0000energy of 340 eV, which is much higher than the value of about 100 eV for a\u0000defect free material. At the energies below 2.5 keV, a constant plateau yield\u0000value could be observed. As indicated by significantly increased energies of\u0000emitted protons, this effect can be associated with the thermal DD fusion. A\u0000theoretical model explains the experimental observations by creation of ion\u0000tracks induced in the target by projectiles, and a high phonon density which\u0000locally increases temperature above the melting point. The nuclear reaction\u0000rate taking into account recently observed DD threshold resonance agrees very\u0000well with the experimental data.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measurement of inclusive jet cross section and substructure in $p$$+$$p$ collisions at $sqrt{s_{_{NN}}}=200$ GeV","authors":"PHENIX Collaboration, N. J. Abdulameer, U. Acharya, C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, J. Alexander, M. Alfred, V. Andrieux, S. Antsupov, K. Aoki, N. Apadula, H. Asano, E. T. Atomssa, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, X. Bai, N. S. Bandara, B. Bannier, E. Bannikov, K. N. Barish, S. Bathe, V. Baublis, C. Baumann, S. Baumgart, A. Bazilevsky, M. Beaumier, R. Belmont, A. Berdnikov, Y. Berdnikov, L. Bichon, D. Black, B. Blankenship, D. S. Blau, J. S. Bok, V. Borisov, K. Boyle, M. L. Brooks, J. Bryslawskyj, H. Buesching, V. Bumazhnov, S. Butsyk, S. Campbell, R. Cervantes, C. -H. Chen, D. Chen, M. Chiu, C. Y. Chi, I. J. Choi, J. B. Choi, S. Choi, P. Christiansen, T. Chujo, V. Cianciolo, Z. Citron, B. A. Cole, M. Connors, R. Corliss, N. Cronin, N. Crossette, M. Csanád, T. Csörgő, L. D'Orazio, T. W. Danley, A. Datta, M. S. Daugherity, G. David, K. DeBlasio, K. Dehmelt, A. Denisov, A. Deshpande, E. J. Desmond, L. Ding, A. Dion, D. Dixit, V. Doomra, J. H. Do, O. Drapier, A. Drees, K. A. Drees, J. M. Durham, A. Durum, H. En'yo, T. Engelmore, A. Enokizono, R. Esha, K. O. Eyser, B. Fadem, W. Fan, N. Feege, D. E. Fields, M. Finger, Jr., M. Finger, D. Firak, D. Fitzgerald, F. Fleuret, S. L. Fokin, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukao, Y. Fukuda, T. Fusayasu, K. Gainey, P. Gallus, C. Gal, P. Garg, A. Garishvili, I. Garishvili, H. Ge, F. Giordano, A. Glenn, X. Gong, M. Gonin, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, T. Gunji, T. Guo, H. Guragain, Y. Gu, T. Hachiya, J. S. Haggerty, K. I. Hahn, H. Hamagaki, H. F. Hamilton, J. Hanks, S. Y. Han, S. Hasegawa, T. O. S. Haseler, K. Hashimoto, R. Hayano, T. K. Hemmick, T. Hester, X. He, J. C. Hill, K. Hill, A. Hodges, R. S. Hollis, K. Homma, B. Hong, T. Hoshino, N. Hotvedt, J. Huang, T. Ichihara, Y. Ikeda, K. Imai, Y. Imazu, M. Inaba, A. Iordanova, D. Isenhower, A. Isinhue, D. Ivanishchev, S. J. Jeon, M. Jezghani, X. Jiang, Z. Ji, B. M. Johnson, K. S. Joo, D. Jouan, D. S. Jumper, J. Kamin, S. Kanda, B. H. Kang, J. H. Kang, J. S. Kang, D. Kapukchyan, J. Kapustinsky, S. Karthas, D. Kawall, A. V. Kazantsev, J. A. Key, V. Khachatryan, P. K. Khandai, A. Khanzadeev, K. M. Kijima, C. Kim, D. J. Kim, E. -J. Kim, M. Kim, Y. -J. Kim, Y. K. Kim, D. Kincses, E. Kistenev, J. Klatsky, D. Kleinjan, P. Kline, T. Koblesky, M. Kofarago, B. Komkov, J. Koster, D. Kotchetkov, D. Kotov, L. Kovacs, F. Krizek, S. Kudo, K. Kurita, M. Kurosawa, Y. Kwon, Y. S. Lai, J. G. Lajoie, A. Lebedev, D. M. Lee, G. H. Lee, J. Lee, K. B. Lee, K. S. Lee, S. Lee, S. H. Lee, M. J. Leitch, M. Leitgab, Y. H. Leung, B. Lewis, S. H. Lim, M. X. Liu, X. Li, X. Li, V. -R. Loggins, S. Lokos, D. A. Loomis, K. Lovasz, D. Lynch, C. F. Maguire, T. Majoros, Y. I. Makdisi, M. Makek, A. Manion, V. I. Manko, E. Mannel, M. McCumber, P. L. McGaughey, D. McGlinchey, C. McKinney, A. Meles, M. Mendoza, B. Meredith, Y. Miake, T. Mibe, A. C. Mignerey, A. Milov, D. K. Mishra, J. T. Mitchell, M. Mitrankova, Iu. Mitrankov, G. Mitsuka, S. Miyasaka, S. Mizuno, A. K. Mohanty, S. Mohapatra, P. Montuenga, T. Moon, D. P. Morrison, M. Moskowitz, T. V. Moukhanova, B. Mulilo, T. Murakami, J. Murata, A. Mwai, T. Nagae, K. Nagai, S. Nagamiya, K. Nagashima, T. Nagashima, J. L. Nagle, M. I. Nagy, I. Nakagawa, Y. Nakamiya, K. R. Nakamura, T. Nakamura, K. Nakano, C. Nattrass, P. K. Netrakanti, M. Nihashi, T. Niida, R. Nouicer, N. Novitzky, T. Novák, G. Nukazuka, A. S. Nyanin, E. O'Brien, C. A. Ogilvie, H. Oide, K. Okada, J. D. Orjuela Koop, M. Orosz, J. D. Osborn, A. Oskarsson, G. J. Ottino, K. Ozawa, R. Pak, V. Pantuev, V. Papavassiliou, I. H. Park, J. S. Park, S. Park, S. K. Park, L. Patel, M. Patel, S. F. Pate, J. -C. Peng, D. V. Perepelitsa, G. D. N. Perera, D. Yu. Peressounko, C. E. PerezLara, J. Perry, R. Petti, M. Phipps, C. Pinkenburg, R. P. Pisani, M. Potekhin, M. L. Purschke, H. Qu, J. Rak, I. Ravinovich, K. F. Read, D. Reynolds, V. Riabov, Y. Riabov, E. Richardson, D. Richford, T. Rinn, N. Riveli, D. Roach, S. D. Rolnick, M. Rosati, Z. Rowan, M. S. Ryu, A. S. Safonov, B. Sahlmueller, N. Saito, T. Sakaguchi, H. Sako, V. Samsonov, M. Sarsour, S. Sato, S. Sawada, B. Schaefer, B. K. Schmoll, K. Sedgwick, J. Seele, R. Seidl, Y. Sekiguchi, A. Seleznev, A. Sen, R. Seto, P. Sett, A. Sexton, D. Sharma, A. Shaver, I. Shein, T. -A. Shibata, K. Shigaki, M. Shimomura, T. Shioya, K. Shoji, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, B. K. Singh, C. P. Singh, V. Singh, M. Skolnik, M. Slunečka, K. L. Smith, M. Snowball, S. Solano, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, P. W. Stankus, P. Steinberg, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, M. R. Stone, T. Sugitate, A. Sukhanov, T. Sumita, J. Sun, Z. Sun, J. Sziklai, A. Takahara, A. Taketani, Y. Tanaka, K. Tanida, M. J. Tannenbaum, S. Tarafdar, A. Taranenko, G. Tarnai, E. Tennant, R. Tieulent, A. Timilsina, T. Todoroki, M. Tomášek, H. Torii, C. L. Towell, R. S. Towell, I. Tserruya, Y. Ueda, B. Ujvari, H. W. van Hecke, M. Vargyas, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, M. Virius, V. Vrba, N. Vukman, E. Vznuzdaev, R. Vértesi, X. R. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, Y. S. Watanabe, F. Wei, S. Whitaker, S. Wolin, C. L. Woody, M. Wysocki, B. Xia, L. Xue, C. Xu, Q. Xu, S. Yalcin, Y. L. Yamaguchi, H. Yamamoto, A. Yanovich, S. Yokkaichi, I. Yoon, J. H. Yoo, I. Younus, Z. You, I. E. Yushmanov, H. Yu, W. A. Zajc, A. Zelenski, S. Zhou, L. Zou","doi":"arxiv-2408.11144","DOIUrl":"https://doi.org/arxiv-2408.11144","url":null,"abstract":"The jet cross-section and jet-substructure observables in $p$$+$$p$\u0000collisions at $sqrt{s}=200$ GeV were measured by the PHENIX Collaboration at\u0000the Relativistic Heavy Ion Collider (RHIC). Jets are reconstructed from\u0000charged-particle tracks and electromagnetic-calorimeter clusters using the\u0000anti-$k_{t}$ algorithm with a jet radius $R=0.3$ for jets with transverse\u0000momentum within $8.0<p_T<40.0$ GeV/$c$ and pseudorapidity $|eta|<0.15$.\u0000Measurements include the jet cross section, as well as distributions of\u0000SoftDrop-groomed momentum fraction ($z_g$), charged-particle transverse\u0000momentum with respect to jet axis ($j_T$), and radial distributions of charged\u0000particles within jets ($r$). Also meaureed was the distribution of\u0000$xi=-ln(z)$, where $z$ is the fraction of the jet momentum carried by the\u0000charged particle. The measurements are compared to theoretical next-to and\u0000next-to-next-to-leading-order calculatios, PYTHIA event generator, and to other\u0000existing experimental results. Indicated from these meaurements is a lower\u0000particle multiplicity in jets at RHIC energies when compared to models. Also\u0000noted are implications for future jet measurements with sPHENIX at RHIC as well\u0000as at the future Election-Ion Collider.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Search for magnetic monopole pair production in ultraperipheral Pb+Pb collisions at $sqrt{s_{_textrm{NN}}}=5.36$ TeV with the ATLAS detector at the LHC","authors":"ATLAS Collaboration","doi":"arxiv-2408.11035","DOIUrl":"https://doi.org/arxiv-2408.11035","url":null,"abstract":"This Letter presents a search for highly ionizing magnetic monopoles in\u0000262$~mu$b$^{-1}$ of ultraperipheral Pb+Pb collision data at\u0000$sqrt{s_{_textrm{NN}}}=5.36$ TeV collected by the ATLAS detector at the LHC.\u0000A new methodology that exploits the properties of clusters of hits\u0000reconstructed in the innermost silicon detector layers is introduced to study\u0000highly ionizing particles in heavy-ion data. No significant excess above the\u0000background, which is estimated using a data-driven technique, is observed.\u0000Using a nonperturbative semiclassical model, upper limits at 95% confidence\u0000level are set on the cross-section for pair production of monopoles with a\u0000single Dirac magnetic charge in the mass range of 20-150 GeV. The search\u0000significantly improves on the previous cross-section limits for production of\u0000low-mass monopoles in ultraperipheral Pb+Pb collisions.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}